What is the preferred surface preparation method for many components of support equipment?

• A. Anodizing
• B. Chemical degreasing only
• C. Abrasive or grit blasting
• D. Polishing with fine abrasive

Answer: (C)

Abrasive or grit blasting is preferred because it both cleans and prepares the surface for coating. The blasting process removes rust, scale, old coatings, oils, and other contaminants, and it also roughens the surface to create a mechanical key for the coating to grip. This combination—cleanliness plus a suitable surface profile—improves coating adhesion and long-term corrosion resistance across the varied materials found in support equipment.

Other methods have limitations: polishing with a fine abrasive yields an overly smooth surface with poor coating adhesion; chemical degreasing may remove oils but often misses rust, scale, and residues and doesn’t provide the necessary roughness; anodizing is specific to aluminum and changes the surface rather than preparing it for a broad range of coatings.