Rustproofing

Prevention of rusting of iron and steel objects Severe car body corrosion example Rustproofing is the prevention or delay of rusting of iron and steel objects, or the permanent protection against corrosion. Typically, the protection is achieved by a process of surface finishing or treatment. Depending on mechanical wear or environmental conditions, the degradation may not be stopped completely, unless the process is periodically repeated.[not verified in body] The term is particularly used in the automobile industry.[citation needed] Vehicle rustproofing Factory In the factory, car bodies are protected with special chemical formulations. Typically[according to whom?], phosphate conversion coatings were used.[when?][by whom?] Some firms galvanized part or all of their car bodies before the primer coat of paint was applied.[citation needed] If a car is body-on-frame, then the frame (chassis) must also be rustproofed. In traditional automotive manufacturing of the early- and mid-20th century, paint was the final part of the rustproofing barrier between the body shell and the atmosphere, except on the underside. On the underside, an underseal rubberized or PVC-based coating was often s