Which standard describes near-white commercial blast cleaning?

The standard that describes near-white commercial blast cleaning is SSPC-SP6/NACE 3. This standard outlines the necessary cleanliness levels and surface preparation practices for steel surfaces that have been blast cleaned to remove all visible contaminants, such as rust, mill scale, and old coatings. The term "near-white" refers to a surface that has a minimal amount of staining or discoloration left from contaminants, allowing for a clean anchor pattern for new coatings to adhere effectively.

The standard also specifies that the resulting surface should have a uniform appearance with no more than a trace of residue or staining, which is crucial for ensuring optimal performance of protective coatings. Meeting these cleanliness standards is vital for the durability and longevity of coatings applied in industrial settings, as it significantly impacts adhesion and overall performance.

Other options, while related to surface preparation, refer to different levels of cleanliness or specific techniques that do not match the criteria defined for near-white commercial blast cleaning.