The First Word in Protective & Marine Coatings

A Product of Technology Publishing / PaintSquare
JPCL | PaintSquare News | Durability + Design | Paint BidTracker

Problem Solving Forum

| More

PSF Archive

Question Dates Displayed
Zinc metalizing has been applied to concrete surfaces to provide cathodic protection to rebar in the concrete. What are the problems, if any, with applying zinc metalizing to concrete, and what is the best approach to addressing them? 10/7 to 10/13/2013
Why would a pull-off adhesion test give a high value (no failure) for a solventless epoxy that later showed poor adhesion in service? 7/1 to 7/7/2013
Which type of abrasive blasting media is suitable for preparing the more “exotic” stainless steels, such as Inconel or Monel? 3/17 to 3/21/2014
Which single type of paint system can be used to protect both stainless steel and carbon steel welded together? 3/3 to 3/7/2014
Which lining systems are suitable for the maintenance painting of an mono ethylene glycol storage tank protection? 8/1 to 8/7/2011
Which industries or market sectors are adopting the use of powder coating? 12/24 to 1/6/2013
Which generic coating systems are suitable for protecting pipeline internals carrying highly abrasive media? 10/31 to 11/6/2011
Which factors are most important in selecting coatings for new concrete? 7/16 to 7/22/2012
Which DFT statistics should be recorded in a daily inspection report, and why are they relevant to a good coating QC record? 6/20 to 6/26/2011
Where would you use epoxy and cementitious intumescent coatings? 5/13 to 5/19/2013
Where are errors most likely to occur when measuring dry film thickness on steel, and how can they be avoided? 8/19 to 8/25/2013
When we use field splice plate connections on structural steel projects, how do we prevent rust and rust staining at bolt heads and at the splice plate/steel interface? 5/12 to 5/16/2014
When we use field splice plate connections on structural steel projects, how do we prevent rust and rust staining at bolt heads and at the splice plate/steel interface? 10/18 to 10/31/2010
When the relative humidity in a paint shop exceeds 80%, how can you apply waterborne inorganic zinc so that it cures sufficiently for topcoating in a reasonable time? 1/30 to 2/5/2012
When SSPC-SP3 (Power Tool Cleaning) is specified, how should one decide when to apply the power tool to the entire surface and when to use it just where the coating appears to be defective or rusting? 1/31 to 2/6/2011
When specifying coatings for maintenance repainting of structural steel, under what conditions is it acceptable to settle for a surface-tolerant system, and when is such a system unacceptable? 4/25 to 5/1/2011
When should you specify UHP waterjetting on bridges? 10/17 to 10/23/2011
When should the adhesion of an applied coating or lining multi-coat system be tested? 11/26 to 12/2/2012
When preparing to refurbish an old concrete secondary containment wall around a storage tank, what criteria should be used to determine if a crack can be repaired for coating or if the section of the wall should be rebuilt? 12/5 to 12/11/2011
When performing maintenance surveys on structures that require coatings under insulation, how do you inspect the condition of the coatings? 1/3 to 1/9/2011
When performing maintenance surveys on structures that require coatings under insulation, how do you inspect the condition of the coatings? 5/5 to 5/9/2014
When performing maintenance painting of tank coatings, what are the pros and cons of overcoating an existing lining that appears to be in good condition? 1/2 to 1/8/2012
When moisture permeates concrete slabs or walls below grade, how can this problem be solved and does it require excavation? 3/28 to 4/3/2011
When is it cost-effective to use thermal spray in petrochemical facilities? 11/14 to 11/20/2011
When implementing an in-plant, exterior exposure, or accelerated testing program for coatings, should the test panels be scribed? Why? 3/7 to 3/13/2011
When blasting cast-iron structural steelwork, what type of defects might be found, and how do you address them? 6/18 to 6/24/2012
When applying a 100% solids, fast-curing polyurea coating on concrete, what is the best method for verifying that the proper thickness has been applied? 10/3 to 10/9/2011
When animal fat in slaughterhouses penetrates concrete surfaces, how do you identify and remove the contamination before coating the concrete? 5/26 to 5/30/2014
When and why would I need to stripe coat if I’m using an edge-retention primer? 1/16 to 1/22/2012
When a food plant runs 24/7, even during coating maintenance, tiny airborne food particles can contaminate a prepared surface. How do you identify, prevent and/or remove such contamination before coating? 4/7 to 4/11/2014
When a food plant runs 24/7 even during coating maintenance, tiny food particles floating in the air (e.g., sugar from sugar processing) in the plant can contaminate a prepared surface. How do you prevent such contamination, or identify it and remove it before applying the coating? 9/27 to 10/3/2010
What’s the best way to prevent corrosion of reinforcing bar in concrete? 3/5 to 3/11/2012
What’s the best way to prevent corrosion of reinforcing bar in concrete? 11/19 to 11/25/2012
What’s the best way to determine if a cementitious-based mortar used to repair exterior concrete is ready to be coated? 2/17 to 2/21/2014
What would be a reasonable service life for a two-coat, zinc-rich epoxy/epoxy mastic system, about 200-250 microns, in a marine environment? What evidence is there from the field? 2/3 to 2/7/2014
What type of generic coating is required to protect the inside of a tank containing liquid with pH ranging from 2 to 13 and operated at 65-80°C? Why? 4/29 to 5/5/2013
What type of coating system (and surface prep) should be used to protect a steel factory roof that is subject to hydrochloric acid vapors and other industrial pollutants and particulates in a hot, humid environment? 2/24 to 2/28/2014
What type of antifouling or foul-release coating will provide the greatest protection in warm tropical waters, and for how long? 9/2 to 9/8/2013
What tests should be run to determine if an existing concrete bridge pier needs rehabilitation or repair before cleaning and coating? 5/21 to 5/27/2012
What tests and criteria can a coatings user specify to assure consistent lot-to-lot performance of supplied coatings? 9/16 to 9/22/2013
What steps must be taken to mitigate poor adhesion over an existing aged silver aluminum paint? What primer will achieve good adhesion? 6/27 to 7/4/2011
What smartphone apps or online tools do you find useful in your job? How do they work, and how have they benefited you? 5/31 to 6/5/2011
What should be included in the risk assessment of a particular painting project? 1/28 to 2/3/2013
What quality control checks can I use to assure the cleanliness of steel abrasive in a fabricator's or shipyard's shop? 11/22 to 11/28/2010
What procedures and tools are needed for assessing the condition of coatings and substrates in a process facility to develop a maintenance painting plan? 8/4 to 8/10/2010
What percentage of deterioration is acceptable at a one-year warranty inspection of water tank linings before a contractor must repair the coating job? 5/23 to 5/29/2011
What must specifiers consider when selecting and using sealants and grouts to fill gaps and seal concrete structures? 7/2 to 7/8/2012
What measures must you take to determine and assure the cleanliness of an abrasive? 2/6 to 2/12/2012
What kind of training and credentials are needed in the U.S. for industrial painters who work near live wires? 11/18 to 11/22/2013
What kind of initial treatment is the best defense against graffiti for rough-surfaced concrete block (CMU)? 6/9 to 6/13/2014
What kind of coating system, including surface preparation, should be used to protect a steel factory roof that is subject to hydrochloric acid vapors and other industrial pollutants and particulates in a hot, humid environment? 9/7 to 9/12/2010
What is the state-of-the-art treatment and preservation of the many cables used on suspension bridges? 2/21 to 2/27/2011
What is the service life of a painted weathering steel bridge, compared to a painted carbon steel bridge in the same service environment? 12/12 to 12/18/2011
What is the risk of damaging a paint film by inspecting a repaired area more than twice with a high-voltage holiday detector? 12/16 to 12/23/2013
What is the remedial action if a blaster produces too high a surface profile for the required primer thickness? 7/18 to 7/24/2011
What is the proper surface preparation for stainless steel before coating to resist a salt-laden atmosphere? 9/3 to 9/9/2012
What is the preferred method to remove 25-year-old coal tar epoxy from a carbon steel tank in order to reline? 6/6 to 6/12/2011
What is the most common or economical coating system for rehabbing the exterior of above-ground storage tanks? 1/2 to 5/22/2012
What is the maximum temperature that an epoxy powder coating can resist when applied on steel substrate? 2/4 to 2/10/2013
What is the maximum number of holidays that should be permitted for linings used in immersion service, and why? 2/14 to 2/20/2011
What is the effect of using a lower-metallic-content zinc-rich epoxy on the life of a paint system? 7/30 to 8/5/2012
What is the effect of the wind-chill factor on the curing of epoxy and PU when temperatures are similar? 4/1 to 4/7/2013
What is the difference between a damp-surface tolerant and a wet-surface tolerant paint? How can we determine when a surface is damp or wet? 1/2 to 1/12/2014
What is the correct procedure for carrying out preventive maintenance painting work in a small chemical product tank? 12/10 to 12/16/2012
What is the Cold Wall Effect? Can it cause premature coating failure and, if so, how do I prevent or minimize it? 12/20 to 1/2/2011
What is the best way to repair localized coating breakdown on steel? 3/11 to 3/17/2013
What is the best way to remove thick-film elastomers from floors and ship decks? 3/31 to 4/4/2014
What is the best way to remove thick film elastomers from floors and ship decks? 9/20 to 9/26/2010
What is the best way to assure compliance with specified dry film coating thickness requirements on vertical concrete? 7/7 to 7/20/2014
What is the best way to achieve proper surface preparation in areas with limited access, such as interior box beams on bridges? 5/14 to 5/20/2012
What is the best method for removing production machine oils soaked deeply into a concrete floor before applying a non-skid coating? 1/9 to 1/15/2012
What is the best method for protecting cables on suspension bridges from corrosion? 10/1 to 10/7/2012
What is the best method for preparing newly galvanized steel to be overcoated with an epoxy system? 11/7 to 11/13/2011
What is the best low-maintenance approach to coating power-tool-cleaned field weld joints on process pipework that is protected with thermal-sprayed aluminum? 9/9 to 9/15/2013
What is most effective treatment for steel contaminated with MIC before painting ? 3/18 to 3/24/2013
What is best way to remedy over-thickness of a topcoat after it has dried and cured? 5/9 to 5/15/2011
What is an acceptable level of moisture in concrete walls before painting with an acrylic system, and how is the moisture level measured? 9/12 to 9/18/2011
What health and safety precautions do contractors have to take when applying isocyanate-cured epoxies in the field? 10/10 to 10/16/2011
What do you do when the surface profile is higher than the dry film thickness of the specified primer? 3/10 to 3/14/2014
What differences in performance and speed do you see among plural-component, conventional airless, and conventional air spraying equipment for field painting structural steel? 10/8 to 10/14/2012
What components of an onshore shale gas drilling rig require coating protection, and what properties must the coatings have? 9/30 to 10/4/2013
What coating problems are likely in storage tanks that have dissimilar metal sides and floors? 6/25 to 7/1/2012
What causes static electricity during abrasive blasting? What risk does it pose, and how can it be controlled? 10/15 to 10/21/2012
What causes bubbling or cratering of epoxy intermediate coat when applied over epoxy zinc-rich primer? 12/17 to 12/23/2012
What causes blistering/crater formation in freshly applied polyurethane topcoats, and how can this be avoided? 3/4 to 3/10/2013
What causes amine blush in epoxy topcoats? 2/18 to 2/24/2013
What can be done to prevent rust bleed in crevices when applying a zinc/epoxy/urethane system? 10/24 to 10/30/2011
What are the significant performance differences between an inorganic zinc primer (ethyl silicate) and an organic zinc primer (epoxy), given the same application and exposure conditions? 4/14 to 4/18/2014
What are the significant differences in performance between an inorganic zinc primer (ethyl silicate) and an organic zinc primer (epoxy), given the same application and exposure conditions? 8/17 to 8/22/2010
What are the pros and cons of using shotblasting to remove a coating system from a concrete floor? 1/24 to 1/30/2011
What are the pros and cons of using shotblasting to remove a coating system from a concrete floor? 6/16 to 6/20/2014
What are the pros and cons of specifying sieve sizes for abrasives? 7/23 to 7/29/2012
What are the performance distinctions among various types of intumescent coatings (for example, water-based, solvent based, epoxies, methacrylates, etc.)? 9/24 to 9/30/2012
What are the options for shop-applied systems (surface preparation and coating type) to protect the interiors and exteriors of new saltwater storage tanks and associated steelwork that will be exposed to seawater, and that will allow for easy touchup and maintenance once the structures are erected? 7/25 to 7/31/2011
What are the most effective procedures for protecting steel and adjacent concrete together? 7/9 to 7/15/2012
What are the most effective procedures for protecting steel and adjacent concrete together? 5/7 to 5/13/2012
What are the limitations of rust-encapsulating coatings? 4/8 to 4/14/2013
What are the criteria for selecting coatings for application during extreme (atmospheric) heat? 6/11 to 6/17/2012
What are the best practices for a small maintenance shipyard (120m x 20m x 8m drydock) to handle UHP-generated wastes? 10/21 to 10/27/2013
What are the best cycles to use in cyclic accelerated corrosion testing to achieve the highest correlation with atmospheric exposure in a northern, industrial environment? 7/4 to 7/10/2011
What are the alternatives for removing mildew from previously uncoated concrete block exteriors before coating? 8/30 to 9/7/2010
What are the advantages and disadvantages of using mechanical equipment inspectors or welding inspectors, instead of certified coating inspectors, to perform coating inspection duties? 8/13 to 8/19/2012
What are the benefits and risks of using holiday testing on mat-reinforced, thermoset linings (over a conductive primer) on concrete substrates intended for immersion service? Should other tests be performed with or instead of holiday testing? 8/23 to 8/29/2010
What are some ways to improve transfer efficiency of airless spray application? 6/17 to 6/23/2013
What advantages/disadvantages have you seen with using recycled glass abrasives vs. traditional abrasives? 8/6 to 8/12/2012
What action should be taken if the IOZ fails the MEK test? 2/25 to 3/3/2013
We are restricted to applying road marking paints during hot, humid summer nights, on surfaces very often below dew point conditions. What is the best generic type of marking paint to use? 4/23 to 4/29/2012
Under what types of exterior atmospheric exposures (other than marine) is it necessary to test for soluble salts? 11/5 to 11/11/2012
Under what conditions should stainless steel be painted in the oil and gas industry? 4/4 to 4/10/2011
Under what conditions should small-diameter blisters (<1.5 inches) in a water tank lining be repaired/repainted? Should the blisters be broken and the substrate examined? 10/22 to 10/28/2012
Under what circumstances is third-party inspection justified on commercial coating work? 2/10 to 2/14/2014
There are ways to increase the pressure for waterjetting to levels above 20,000 psi. What are the effects of different pressures (below and above 20,000 psi) on cleaning ratios? 12/9 to 12/13/2013
The literature indicates that UHP waterjetting does produce a profile on steel, although of a micro nature. Is this sufficient roughness for good adhesion of thin film primers (e.g. < 2 mils dft)? 12/13 to 12/19/2010
The façade of my late-19th-century, cast-iron office building has been coated several times, most recently in the 1960s. The paint is faded and delaminating, and I want to remove and replace it. How do I assess the condition of the cast iron and coating, repair weakened areas of the cast iron, and prepare and recoat the surface? 10/4 to 10/10/2010
Specifications often state that glossy surfaces must be dulled before overcoating. What are some methods for doing this, especially when sanding isn’t feasible or desirable? 8/29 to 9/4/2011
Some painting specifications call for the use of “Best Effort” in relation to blasting. How does one determine “Best Effort?” 2/20 to 2/26/2012
Should the surfaces of flanges be coated to prevent corrosion? Why or why not? 5/20 to 5/26/2013
Lighthouse Painting: I'm with a Massachusetts municipal park department and have been ordered by the city's administration to "get the lighthouse painted." I know there's far more to it than just grabbing a brush and a can of paint. I need to know how to write specifications for a bid for such a project, as well as how to locate companies that might want the job. Since I'm starting from scratch here, any information or references would be greatly appreciated.

Submitted by reader William Woolley
7/11 to 7/17/2011
Is there a requirement that NIST calibration plates or blocks be calibrated? If so, what is the best way to do so? 12/19 to 12/25/2011
Is there a place for using “rust convertors” in heavy-duty maintenance projects? 4/22 to 4/28/2013
Is there a definitive relationship between mechanical properties of coatings (such as elongation and tensile strength) and crack-bridging capability? 1/27 to 1/31/2014
Is there a definitive relationship between mechanical properties of coatings (such as elongation and tensile strength) and crack-bridging capability? 8/11 to 8/16/2010
Is the MEK rub test a conclusive test to check the cure of IOZ coatings? 1/14 to 1/20/2013
Is stainless steel banding suitable for fixing galvanized insulation cladding? If not, why not? 1/23 to 1/29/2012
Is it sufficient to specify simply that paint should be applied "according to the manufacturer’s instructions?" If not, what kind of detail should be included? 12/6 to 12/12/2010
Is it practical to use black light to check for dirt or other foreign matter during surface preparation inspection? 1/20 to 1/24/2014
Is it necessary to holiday test the interior lining in the vapor phase (roof) of water storage tanks after coating? 9/5 to 9/11/2011
Is it cost-effective to pressure wash a bridge or other structure before abrasive blasting? What pressures, flow rates, and procedures are recommended? 11/12 to 11/18/2012
Is it cost-effective to grind steel edges before coating for atmospheric service? Why or why not? 10/29 to 11/4/2012
Is grinding the only way to remove large areas of a silicone coating from a ship's hull to replace the silicone with an epoxy mastic? 1/10 to 1/16/2011
In preparing for coating, what is the best way to treat a steel surface that has been attacked by microbiologically influenced corrosion (MIC)? 5/29 to 6/1/2012
If I apply a zinc-rich epoxy primer at 3 mils’ dry film thickness in the shop with air temperature of 90 F, what checks can I make to determine when it is safe to handle and stack the primed steel components? 5/31 to 6/22/2010
If I apply 140 microns of inorganic zinc to a steel substrate with a 75 micron profile, is there any concern about cracking of the primer during storage, shipment, and erection of the structure, or with field-application of a topcoat? 7/7 to 7/18/2010
If a paint data sheet notes a required primer thickness of 125 microns, but the project specification calls for 50 microns, how is this resolved? 2/27 to 3/4/2012
I need to embed a metallized culvert liner on concrete. I've been told I have to paint it to avoid adhesion problems between the metal liner and the concrete. Is this true and, if so, what type of coating is best? 6/13 to 6/19/2011
I need to coat a bare concrete warehouse floor that has visible oil stains. What are my options for cleaning the concrete before coating it? 1/13 to 1/18/2014
I keep reading references to sweep blasting, but I can't find a standard for it. What is sweep blasting, and is there a standard for it in the U.S. or elsewhere? 11/4 to 11/8/2013
I have several water tanks constructed with carbon steel for demineralized water storage. The tanks are about 20 years old, and the original coating has started to blister. For refurbishment of the coating, what material should be used and at what dry film thickness? The original type of coating is unknown. 6/22 to 7/6/2010
I have several 20-year-old carbon steel tanks for storing demineralized water. The original coating (type unknown) has started to blister. What material, at what DFT, should be used to refurbish the coating? 4/21 to 4/25/2014
I have galvanized steel in direct contact with powder-coated aluminum in an outdoor exposure. The galvanized steel is corroding. What is the best way to remedy the situation? 11/11 to 11/15/2013
I am experiencing problems with a paint system on some vessels we built. The system is an ethyl silicate zinc primer, glass flake epoxy tie-coat and aliphatic poly top coat. The project is constructed from A516 boiler plate 1/4 in thick. Blasted to SP10 with 2.5 mil profile. Painting is being done inside a paint booth where ambient conditions clearly meet the specification. The coatings are exhibiting symptoms of solvent popping in a specific area on the exterior of the vessel. The problem only manifests itself over the back side of a weld that is on the inside of the vessel. We have made numerous adjustments to the system as well as the process to try to solve the issue. Nothing is helping. The manufactures reps are scratching their heads, and I am pulling my hair out. Any input would be welcome. 1/7 to 1/13/2013
How, besides grinding, can one remove large areas of silicone coating from a ship’s hull to replace the silicone with an epoxy mastic? 6/2 to 6/6/2014
How should surface preparation be conducted in non-sparking atmospheres? 6/23 to 6/27/2014
How should surface preparation be conducted in non-sparking atmospheres? 1/17 to 1/23/2011
How should a contractor respond when he reads a specification requirement that "the nominal dry film thickness of the coating shall be 3 mils"? 5/17 to 5/23/2010
How should a contractor respond to a specification requirement that “the nominal dry film thickness of the coating shall be 3 mils?” 5/19 to 5/23/2014
How should a conflict between requirements, such as film thickness, on a product data sheet and the specification be resolved? 8/15 to 8/21/2011
How pure must fresh water be for water washing or waterjetting, and how do you determine the water’s purity? 8/27 to 9/2/2012
How long can a blasted surface be left before priming under different temperatures/relative humidity environments? 4/16 to 4/22/2012
How long after blasting can stainless steel be left before painting? If this time is exceeded, what further surface preparation is required? 8/20 to 8/26/2012
How does the concave or convex curvature of a surface affect the WFT reading? 6/24 to 6/30/2013
How does the concave or convex curvature of a surface affect the dry film thickness reading? 5/6 to 5/12/2013
How does the concave or convex curvature of a surface affect a coating's shore hardness reading? 8/12 to 8/18/2013
How does residue from chemical stripping affect the performance of the replacement coating? 2/7 to 2/13/2011
How does rapid depressurization affect lining performance in vessels and line pipe, and how can you identify any failure that might result? 3/21 to 3/27/2011
How does one apply thin polymer coatings to installed tubes or pipes with diameters of one to three inches and lengths of 20 to 60 feet? 4/28 to 5/2/2014
How does one accurately measure coating thickness on the inside and outside of a small-diameter (~50mm) pipe? 5/27 to 6/2/2013
How does abrasive recycling affect cleaning rates when steel is blast-cleaned in the field? 3/24 to 3/28/2014
How does abrasive recycling affect cleaning rates when steel is blast-cleaned in the field? 5/6 to 5/13/2010
How do you successfully apply a chemical-resistant lining to the interior of small-diameter pipes (3 inches or less)? 8/22 to 8/28/2011
How do you repair polyurea coatings? 4/15 to 4/21/2013
How do you repair delaminated areas of an elastomeric polyurea when the majority of the coating system is intact? 11/15 to 11/21/2010
How do you remove all traces of an uncured internal coating from a tank when abrasive blasting is not an option? 6/4 to 6/8/2012
How do you protect concrete against microbiologically influenced corrosion? 4/2 to 4/8/2012
How do you properly coat welded joints? 3/25 to 3/31/2013
How do you prepare flame-cut edges for application of thermal spray metallic coatings? The problem is that these edges are often harder than the abrasive, so a very low profile is produced, resulting in lower-than-specified adhesion of the thermal spray to the steel. 10/14 to 10/20/2013
How do you prepare an oil-stained, bare concrete floor for coating? 8/26 to 9/1/2013
How do you measure wet film thickness on shop-applied organic zinc-rich primers to accurately predict dry film thickness?

Our shop applies a great deal of OZ primer, and we have found that WFT readings with a standard gauge are not accurate predictors of DFT.
2/28 to 3/6/2011
How do you measure the DFT or WFT of a film-forming sealer applied to a metallized coating (e.g., flame-sprayed zinc)? 11/21 to 12/4/2011
How do you maintain a proper operating mix of recyclable abrasive in the field? 11/8 to 11/14/2010
How do you know when pot life has expired? Can you extend pot life and, if so, how? 4/9 to 4/15/2012
How do you gauge the remaining service life of an aging FBE system on a buried transmission pipeline? 4/18 to 4/24/2011
How do you gauge the remaining service life of a weathered alkyd paint system and determine whether it should be removed or overcoated? 8/5 to 8/11/2013
How do you determine whether a lead-bearing coating can be overcoated or removed and replaced? 4/30 to 5/6/2012
How do you determine the size of the dehumidification equipment required for a tank lining project? 5/24 to 5/30/2010
How do you determine if local water is suitable for use in UHP waterjetting, particularly in areas where potable water is scarce? 3/12 to 3/18/2012
How do you calibrate a DFT gauge in the magnetic field of a live power plant to measure coatings on steel substrates? 9/26 to 10/2/2011
How do you adequately assess the adhesion of a newly applied coating? 2/13 to 2/19/2012
How do you accurately measure the adhesion of inorganic zinc? 6/10 to 6/16/2013
How do I minimize corrosion at the splash zone on sheet pile and piping in brackish water? 3/26 to 4/1/2012
How do I identify and remove airborne particles like sugar dust from recently prepared steel in food processing plants that operate 24/7? 11/1 to 11/7/2010
How do I determine when a cementitious-based mortar used to repair exterior concrete is ready to be coated? 10/11 to 10/17/2010
How do admixtures to concrete (hardeners, anti-dust compounds, etc.) affect coating adhesion? What can be done to eliminate or minimize negative effects? 3/14 to 3/20/2011
How clean must the compressed-air supply be for blast cleaning, blow down and painting? How is cleanliness of the air determined? 4/11 to 4/17/2011
How can you justify the cost of installing an auto-blast machine and a paint booth in a fabricator's shop, and what resources are available to carry out such an analysis? 7/19 to 7/28/2010
How can I determine when concrete has cured sufficiently to be coated, besides waiting the 28 days typically specified? 10/25 to 10/31/2010
How can I determine when concrete has cured sufficiently to be coated, besides waiting the 28 days typically specified? 6/3 to 6/9/2013
How can I determine the cleanliness of stainless steel for painting after blast cleaning? 8/8 to 8/14/2011
How can active corrosion be determined on a live pipeline? 3/19 to 3/25/2012
From a specifier’s point of view, what are the important distinctions between various products that are classified as polyurea? 9/10 to 9/16/2012
For coatings with a high-solids content (95% or more), what kinds of defects, such as holidays or micropores, are possible or likely to occur in the applied film? How can these be prevented or remedied? 7/8 to 7/14/2013
During newbuilding, do I have to stripe coat edges if I am using an edge retention primer? 1/21 to 1/27/2013
During a week of heavy rain, we painted the interior walls of a heated concrete building. On the interior of walls that had an outside exposure, the paint blistered badly a week after the rain subsided. Could the rain have caused the blistering and, if so, how? 10/28 to 11/1/2013
During a week of heavy rain, we painted the interior of a heated concrete building. The paint blistered badly a week later on the walls with an outside exposure. What’s the best way to remove the coating, prepare the surface, and recoat to prevent future blistering? 11/25 to 12/6/2013
Can water be sprayed onto an IOZ coated surface, which has not fully cured due to low humid conditions, to accelerate the cure? 2/11 to 2/17/2013
As an engineer in a moderate-sized chemical plant, how can I justify the cost of third-party inspection to upper management? 12/3 to 12/9/2012
As a facility owner, how can I justify the cost of quality control measures, such as third-party inspection, to upper management in my company? 6/30 to 7/4/2014
Are there special primers and surface preparation requirements for painting unpainted aluminum? 9/19 to 9/25/2011
Animal fat in slaughterhouses often penetrates concrete surfaces. If the fat is not removed before the concrete is coated, the fat can cause the coating to fail. How do you identify and remove the contamination before coating the concrete? 9/13 to 9/19/2010
A specification requires Manufacturer X’s system “or equivalent.” What does “or equivalent” mean, and who decides what’s “equivalent?” 5/2 to 5/8/2011
A specification for a bridge to be built of high-performance weathering steel (HPS GR50/GR70W) requires an SSPC-SP 10, a profile of 3 to 5 mils, and metallizing with a final dft of 10-12 mils. What challenges, time, and costs are associated with obtaining the profile, primarily in the shop but also in the field? Are there any long-term performance issues with metallizing over weathering steel? 4/23 to 5/5/2010

Current PSF Question | Submit a PSF Question

Atlantic Design, Inc.

Many service issues can be easily solved over the phone. When you do need parts, ADI has most in stock for all your blasting needs. 866.Call.ADI

Axxiom Manufacturing
Schmidt Introduces
the New miniBRS

Reduced in size, it is incredibly easy to maneuver and operate! The perfect alternative to larger blast & recovery units when project space is limited.
Call 1-800-231-2085

Find BLACK BEAUTY® Abrasives

Use our online tool to search by address, city or zip code to find where you can buy BLACK BEAUTY® abrasives. Or call us toll free: 1-888-733-3646

Advanced Recycling Systems

Recycling Machines, Dust Collectors, Rapid Deployment units are time-tested and approved for the rugged industrial environment. Contact ARS today!

Graco Inc.
Eco-friendly surface prep blasting equipment

EcoQuip blast equipment adds a fine water mist during the spraying process for less dust. Less media consumption. Less cleanup. Easy to use. Call 877.326.7847

NLB Corporation
See NLB Crawler hit the heights

Surface prep 100 ft. and more above the ground is easy with the SRT-10-W-1 Crawler. Rotating water jets work fast, with vacuum recovery and wireless controls.

Montipower, Inc.
The MBX Bristle Blaster

Get a 2.7 to 3.3 mil profile and a Near White Metal Clean. For info visit or call 877 629-8777

Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker JPCL Europe

EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us

© Copyright 2000-2014, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail