Typically, there are two methods for acid washing: chemical and electrolytic. Stainless steel pipeline anti-corrosion only uses chemical acid washing, which can remove oxide scale, rust, and old coatings, and sometimes can also be used as a reprocessing after sandblasting. While chemical cleaning can achieve a certain level of cleanliness and roughness on the surface, it has shallow anchor patterns and is prone to environmental pollution.
Spray (Throw) Blasting for Rust Removal
Shot blasting is a process that utilizes a high-power motor to drive the blast nozzle blades at high speeds. This action propels abrasives such as steel shot, steel grit, wire segments, and minerals against the surface of steel pipes under centrifugal force. Not only does it effectively remove rust, oxides, and debris, but the stainless steel pipes also achieve the desired level of uniform roughness due to the intense impact and friction exerted by the abrasives.
After shot blasting (abrasive blasting) for rust removal, not only does it expand the physical adsorption on the surface of stainless steel pipes, but it also enhances the mechanical adhesion between the anti-corrosion coating and the pipe surface. Therefore, shot blasting (abrasive blasting) for rust removal is an ideal method for pipeline anti-corrosion. Generally speaking, shot blasting (sandblasting) is mainly used for the internal surface treatment of pipes, while abrasive blasting is mainly used for the external surface treatment. Several issues should be noted when using shot blasting (abrasive blasting) for rust removal.
