Abrasive Blast Cleaning

White Metal Blast Cleaning (SSPC-SP5, NACE No. 1)

A surface with a gray-white, uniform metallic color, slightly roughened to form a suitable anchor pattern for coatings. This surface is free of all oil, grease, dirt, mill scale, rust, corrosion products, oxides, paint and other foreign matter.

Near Whiate Blast Cleaning (SSPC-SP10, NACE No. 2)

A surface from which all oil, grease, dirt, mill scale, rust corrosion products, oxides, paint or other foreign matter have been removed except for light shadows, streaks or other discolorations (of oxide bonded to metal). At least 95% of any given square inch has the appearance of “White Metal” and the remainder is limited to slight discolorations.

Commercial Blast Cleaning (SSPC-SP6, NACE No. 3)

A surface from which all oil, grease, dirt, rust scale and foreign matter have been removed except for slight shadows, streaks or discoloration caused by rust stain or mill scale oxide binder. At least two-third of any square inch shall be free of all visible residues and the remainder shall be limited to light discoloration, slight staining, or light residues mentioned above. If the surface is pitted, slight residues of rust or paint are found in the bottoms of the pits.

Brush-Off Blast Cleaning (SSPC-SP7, NACE No. 4)

A surface from which oil, grease, dirt, loose rust scale, loose mill scale and loose paint are removed, but tightly adhering mill scale, rust, paint and coatings are permitted to remain if they have been exposed to the abrasive blast pattern, so that numerous flecks of the underlying metal are uniformly distributed over the entire surface.

Water Blasting (NACE No. RP-01-72)

Removal of oil, grease, dirt, loose rust, loose mill scale and loose paint by water at pressures of 2000-5000 psi.