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Problem Solving Forum (20)


In reviewing the testing data for adhesion, some manufacturers indicate ASTM D4541 results while others show ASTM C3359 results. Is it possible to compare one against the other? For example, does 1037 psi provide better adhesion than 4A?


When performing maintenance surveys on structures that require coatings under insulation, how do you inspect the condition of the coatings?


What is the risk of damaging a paint film by inspecting a repaired area more than twice with a high-voltage holiday detector?


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


What tests and criteria can a coatings user specify to assure consistent lot-to-lot performance of supplied coatings?


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


For coatings with a high-solids content (95 percent 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?


Why would a pull-off adhesion test give a high value (no failure) for a solventless epoxy that later showed poor adhesion in service?


How do you accurately measure the adhesion of inorganic zinc?


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


In what circumstances is third-party inspection recommended for commercial coating work?


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


How do you adequately assess the adhesion of a newly applied coating?


What can be done to prevent rust bleed in crevices when applying a zinc/epoxy/urethane system?


How do you assess vertical concrete surface pH after surface preparation of existing concrete?


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


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?


What tests and criteria can a coatings user specify to assure consistent lot-to-lot performance of supplied coatings?


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?


What quality control checks can I use to assure the cleanliness of steel abrasive in a fabricator's or shipyard's shop?


 
 
   

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