For critically coated areas, what is the profile standard?

For critically coated areas, the standard for surface profile is set at 2 mils. This standard is essential for ensuring that there is adequate surface roughness for proper adhesion of coatings, especially in environments where corrosion protection is paramount. A 2 mil profile creates sufficient texture that allows the coating to mechanically bond with the substrate, reducing the likelihood of delamination and improving the overall durability of the coating system.

In the context of maritime applications, where protective coatings are critical to prevent corrosion and other forms of degradation, adherence to this standard is vital. A profile that is below this threshold may not provide enough surface area for the coating to latch onto, potentially leading to premature failure. Conversely, profiles that are too rough could also interfere with the application process or affect the performance of the coating. Therefore, maintaining a profile standard of 2 mils in critically coated areas is necessary for optimal performance and longevity of the coating system.