Coating vehicle suspension springs comprises heat treating the spring surface by shot peening, mechanical and/or thermal pre treating the spring surface, and partially coating the spring surface by thermal spraying

摘要

Coating a spring comprises heat treating the spring surface by shot peening; mechanical and/or thermal pre treating the spring surface; and partially coating the spring surface by thermal spraying. Preferred Features: The surface is pretreated by sand blasting or by using a laser. A coating is applied by flame spraying, high speed flame spraying, plasma spraying or electric arc wire spraying. The coating material has a lower normal potential in the electrochemical chain than the material of the spring. The coating material consists of zinc, aluminum, copper and/or their alloys.