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Category: Coating / Film thickness

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Problem Solving Forum (17)

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The literature indicates that UHP waterjetting produces a profile on steel, although of a micro nature. Is this sufficient roughness for good adhesion of thin-film primers?

Question posted September 15 to September 19, 2014


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.

Question posted August 18 to August 22, 2014


What is the best way to assure compliance with specified dry film coating thickness requirements on vertical concrete?

Question posted July 7 to July 20, 2014


How should a contractor respond to a specification requirement that “the nominal dry film thickness of the coating shall be 3 mils?”

Question posted May 19 to May 23, 2014


What is the best way to remove thick-film elastomers from floors and ship decks?

Question posted March 31 to April 4, 2014


How does one accurately measure coating thickness on the inside and outside of a small-diameter (~50mm) pipe?

Question posted May 27 to June 2, 2013


How does the concave or convex curvature of a surface affect the dry film thickness reading?

Question posted May 6 to May 12, 2013


How many times can a building be repainted before the paint becomes too thick to perform properly?

Question posted November 17 to November 25, 2012


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?

Question posted February 27 to March 4, 2012


How do you measure the DFT or WFT of a film-forming sealer applied to a metallized coating (e.g., flame-sprayed zinc)?

Question posted November 21 to December 4, 2011


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?

Question posted October 3 to October 9, 2011


How is it possible to determine if concrete is sound enough to receive a thick-film coating?

Question posted May 9 to May 15, 2011


What is best way to remedy over-thickness of a topcoat after it has dried and cured?

Question posted May 9 to May 15, 2011


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.

Question posted February 28 to March 6, 2011


What generic types of coatings work best as liquid-applied air barriers, considering both cost and effectiveness, and what should be the dry film thickness of this system?

Question posted February 14 to February 20, 2011


What is the best way to assure compliance with specified dry film coating thickness requirements on vertical concrete?

Question posted January 31 to February 6, 2011


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?

Question posted May 31 to June 22, 2010


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