What does NACE SP0188 refer to?

NACE SP0188 is a standard established by the National Association of Corrosion Engineers that specifically addresses holiday testing. Holiday testing is a method used to identify uncoated areas or discontinuities in a protective coating on a substrate, typically used in the context of coatings for structures such as pipelines, tanks, and other surfaces exposed to corrosive environments. The process involves applying a voltage to the coated surface, and when a holiday (or defect) exists, it allows current to leak through, which can be detected by the tester. This standard outlines the procedures and requirements for conducting holiday testing effectively to ensure the integrity of the protective coatings.

The other options represent different procedures related to coatings but are not the focus of NACE SP0188. Solvent cleaning is a method for preparing surfaces before coating, surface profile measurement is essential for ensuring proper adhesion, and power tool cleaning refers to the surface preparation technique using mechanical tools, but none of these are specified under NACE SP0188.