Which term reflects the highest standard of cleanliness in blast cleaning according to NACE standards?

The term that reflects the highest standard of cleanliness in blast cleaning according to NACE standards is "Very Thorough Blast Cleaning." This level of cleanliness involves the removal of virtually all rust, mill scale, and old coatings from the surface to provide an ideal substrate for further coating applications. It is a critical requirement when preparing surfaces for coating systems, ensuring that all contaminants that could hinder adhesion or performance are eliminated.

To achieve this standard, specific practices and techniques during the blast cleaning process are employed, ensuring the surface is left in the best possible condition. This thoroughness is essential for the long-term durability and effectiveness of the coating systems to be applied later.