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Problem Solving Forum (20)


On guardrails on a marine wharf, grating panels consisting of mild steel bars about 1/8-inch by 1-inch on a 2-inch-square grid were painted with a three-coat zinc/epoxy/urethane system. Inspectors are finding numerous pinholes in the finish coat along the inside corners of the grating where the 1-inch-thick bars meet at a 90-degree angle. These pinholes were not noticed in the zinc or epoxy coats, but the final coat's visual inspection is more detailed. What is the likely cause of the pinholing, and what could be done to prevent it on future applications? Also, what should the disposition of the parts with pinholes be, as in, repair, accept as is, reblast and recoat, or an alternative?


Alternatives to coal tar epoxies in wastewater/sewage applications have been in service for a number of years. From experience, which coating types with what fillers at what thicknesses (over steel) have performed best?


What are the most effective procedures for protecting steel and adjacent concrete together?


In preparing for coating, what is the best way to treat a steel surface that has been attacked by microbiologically influenced corrosion (MIC)?


What are the most effective procedures for protecting steel and adjacent concrete?


How do you calibrate a DFT gauge in the magnetic field of a live power plant to measure coatings on steel substrates?


I am the facility manager for a new amusement park that will operate year-round in a hot, humid environment. What protective coating system should I select to achieve the longest useful life (cost is a secondary consideration), and what performance can I expect?


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?


How does abrasive recycling affect cleaning rates when steel is blast-cleaned in the field?


What errors are most likely to occur when measuring dry film thickness on steel, and how can I avoid them?


Where are errors most likely to occur when measuring dry film thickness on steel, and how can they be avoided?


What is most effective treatment for steel contaminated with MIC before painting ?


What is the best way to repair localized coating breakdown on steel?


What is the maximum temperature that an epoxy powder coating can resist when applied on steel substrate?


What differences in performance and speed do you see among plural-component, conventional airless, and conventional air spraying equipment for field painting structural steel?


What are the most effective procedures for protecting steel and adjacent concrete together?


In preparing for coating, what is the best way to treat a steel surface that has been attacked by microbiologically influenced corrosion (MIC)?


What are the most effective procedures for protecting steel and adjacent concrete together?


What is the service life of a painted weathering steel bridge, compared to a painted carbon steel bridge in the same service environment?


How do you calibrate a DFT gauge in the magnetic field of a live power plant to measure coatings on steel substrates?


 
 
   

Novatek Corporation
Novatek Corporation, Dustless Coatings Removal

Strip, clean and profile all dust free! Comply with new lead standards. Contact today: (866) 563-7800


Desco Mfg. Co., Inc.

Dust - Free Surface Prep
Made EASY!

Efficient-Fast clean/remove
Advanced Containment
Safe - Well Below OSHA
Yes! - Innovative Solutions!
DESCO Mfg.Co., Inc.
www.descomfg.com
800-337-2648


Waterjet Technology Association (WJTA)
2016 WJTA-IMCA Expo Nov. 2-3, New Orleans

See the latest advances in automated and handheld UHP waterjetting tools/systems for paint/coating removal, surface prep, industrial cleaning. Exhibits, live demos.


Park Derochie Coatings Ltd.
www.ParkDerochie.com

Coatings          Fireproofing
Sandblasting     Scaffolding
Metalizing           Insulation

• Shop & Field Services
• SSPC Certified
• NACE Inspectors on staff
• New Construction &
  Maintenance Programs


Clemco Industries Corp.
Powerful Protection in a Small Package

Mounts inside blast helmet, alerts operator to dangerous breathing-air condition by audible, visual, and vibratory alarms. Easily calibrated, battery operated.


Modern Safety Techniques
Modern Safety Techniques

See our Low Temperature Catalyst for your CO removal needs. Help to provide your workers with safe, comfortable breathing air!


Dampney Co., Inc.
Temperature Indicating Paint/Coating

protective coating that provide a visual warning that a pipe, vessel, reactor, transfer line, and similar equipment is overheating due to failure of refractory linings or the bypassing of hot gasses.


Jotun Paints Inc.
Jotachar JF750 - The Time Saving Solution

The only mesh free solution for jet fire scenarios. Jotachar saves installation time and material costs - the next generation of epoxy passive fire protection.


HoldTight Solutions Inc.
NO FLASH RUST - NO CONTAMINANTS

Our HoldTight®102 salt remover & flash rust
preventer prevents flash
rust by removing surface contaminants. Contact us
for your nearest distributor.
(800) 319.8802 sales@holdtight.com


PPG Protective and Marine Coatings Group
Bringing innovation to the surface.™

PPG Protective & Marine Coatings is widely recognized as a world leader in protective and marine coatings, developing innovative, cutting-edge products and services.

 
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