PaintSquare.com
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram
Search the site

 

Download our FREE eResource: Specifier's Choice Guide. Get it now.

Problem Solving Forum

| More

October 8 - October 14, 2012

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

More items for Coating Application


Selected Answers

From Charles Williams of kurbtblast on October 8, 2012:
     Difference are with capacity (gpm) and number of passes for adequate millage.

From Giuseppe Santagata of NACE Certif. Coat. Insp. level III # 2737 on October 9, 2012:
 Plural component requires  very expensive equipment, but it is fast with good production, and saves a lot of paint material, etc. This equipment needs a professional operator, especially to be sure to  obtain the correct mix ratio at the tip. Airless is 100% fast with very high production, but in some circumstances you have also 80% of paint loss if not set properly (pressure tip size and angle) and you need professional sprayers. The air spray or conventional spray is slow, produces a lot of dry/overspray, but has the possibility to work better in some difficul areas, as well as the possibility to clean the surface to be coated immediately before spraying by using the air in the gun.

From Jerry Trevino of Protective Liner Systems on October 21, 2012:
     Plural component pumps are very effective in spraying and applying 100% solid materials and are more productive than (hot potting) airless pumps. Conventional air spaying will not pump high solids, thick coatings. In the case of 50% to 60% solid materials, airless (hot potting) may be more efficient. Conventional spraying may be more efficient in applying thin, one to three mils of a top coat for uv protection or for an aesthetic coat over thicker coats of paint on the structural steel. All three types of spraying have their pro's and con's. Plural component spray systems have a high risk of being off ratio. Temperature adjustments may have to be made to attempt to equalize the viscosity of both components. In some cases, for instance, you must heat one of the two components more than the other. Fast-setting materials may only be sprayed with plural systems. The size of the project, location, overspray considerations, target paint thickness, and type of coating used are factors that have to be considered in selecting the type of spraying to be used.

From Jay Barstow of Aeroflor Coating Services on October 16, 2012:
     Definitely, single-component airless hot potting a low-viscosity, solventless resin for DFT/sec/SF application. It's a function of viscosity and heat. I have shot over 3 GPM from single King airless for hours at a time on large flooring projects. Heat, especially in plural component, affects viscosity and flow, but because of internal mixing,  the effective pressure, and thus flow rate, is lost.

From Daniel Liu of APC on February 6, 2013:
    Plural component equipment is very expensive, but easy for operation during  coating application once the mixing ratio is set. Especially for those materials that include more than two parts, it can be faster and safer.
      Airless spray equipment is the most common equipment used on site. For  materials with high volume solids and higher total thickness sprayed on large areas, airless spray will be required, as it is faster and more convenient. Since the liquid is pressured without air, there is less chance of air entrapment in the coating film, which is very common in the shipbuilding coating field.
     Air spray is normally  used in the field where the thickness is mainly less than 100 microns. The coating material is atomized with pressured air, then blown out together with air to the substrate.  The air pressure is not strong enough to convey high solids materials, so air spray is normally used with very low solids and  low viscosity coatings.

Please sign in to submit your answer this question    

Tagged categories: Air spray; Airless spray; Paint application; Plural component spray; Steel


Current PSF Question | Submit a PSF Question | Full PSF Archive

Advertisements
 
Carlisle Fluid Technologies
 
Built for Tough Jobs
 
From Epoxies to Urethanes to other high solid coatings, the new Binks Airless 75 delivers a great finish using an ergonomic design. Visit binks.com for more information.
 

 
Detail Masters
 
Overspray Removal
 
We offer professional, turnkey service and unparalleled quality!
Our process can save hundreds— even thousands of dollars. It's fast, environmentally safe and 100% guaranteed.
 

 
SABRE Autonomous Solutions
 
Safety, Productivity, Quality. Robotic Blasting
 
Learn how this simple to use, field deployed, automatic robot is eliminating hazards in major confined, cluttered and complex surface preparation projects.
 

 
PSS Industrial Group
 
AirTech - World Leader in Custom Spray Solutions
 
AirTech is the solution
for any custom spray application. We have painting & finishing equipment, blast equipment, painting accessories, booth filter and many more items in inventory.
 

 
Tarps manufacturing, Inc.
 
QUALITY MADE IN AMERICA —Available near you!
 
CLICK to get a behind-the-scenes look at how Tarps Manufacturing makes the highest-quality tarps right here in the USA — available nationwide.
 

 
Fischer Technology Inc.
 
NEW PROBE FOR MEASURING TSA THICKNESS
 
Paired with the PHASCOPE PMP10, Fischer’s new probe is quick and accurate for measuring thermally sprayed aluminum on stainless steel. Click to learn more.
 

 
SAFE Systems, Inc.
 
Enduroguard -
The Tough Cable
for a Tough Industry.
 
Reduce maintenance costs and down time, increase job site safety with Enduroguard Cable. Available exclusively from SAFE Systems. UL listed, flexible, abrasion resistant and cut resistant.
 

 
Harsco
 
BLACK BEAUTY® App
 
Download the free app for BLACK BEAUTY® Abrasives. Explore all the features from the palm of your hand.
Toll Free: 1-888-733-3646
 

 
Clemco International GmbH
 
Global engineering-trusted solutions
 
For more than 70 years, Clemco has provided the highest quality blast equipment with a total commitment to comfort and safety.
 

 
Hempel (USA) Inc.
 
Trusted worldwide for advanced protective coatings
 
Trusted worldwide
for advanced
protective, coatings
–Full range of 
  advanced coatings
–Optimised application
–Fast, reliable service  worldwide. Contact us at oilandgas@hempel.com
 

 
 
 

Technology Publishing Co., 2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

 
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 PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us