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Problem Solving Forum (12)


Should pull-off adhesion tests be carried out on a zinc-rich primer alone, or only on a complete system?


Is there any method to take accurate wet film thickness readings when applying zinc rich primers?


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?


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?


How do you accurately measure the adhesion of inorganic zinc?


What causes bubbling or cratering of epoxy intermediate coat when applied over epoxy zinc-rich primer?


What is the recommended coating system and procedure for repairing deteriorated inorganic zinc/epoxy/polyurethane 3-coat systems? Does the repair system or procedure vary with the degree of deterioration and if so, how?


How does a lower-metallic-content zinc-rich epoxy affect the life of a paint system?


What are the pros and cons of using an organic vs. inorganic zinc primer?


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?


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?


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?


 
 
   

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