What is the importance of stainless steel extension springs surface treatment?

What is the importance of stainless steel extension springs surface treatment?

        Stainless steel extension springs are mostly made of stainless steel materials such as 304 and 305. Although stainless steel has strong anti-rust properties, in terms of metal characteristics, our technical support must be rust-proof surface treatment for stainless steel extension springs. Of course, there is another aspect that our surface treatment not only protects but also improves aesthetics. No matter what it is, our stainless steel Extension spring surface treatment process is not a project that can be ignored.

        The stainless steel Extension spring operating environment has no strong solvent smell, less air pollution, and the waste water treatment and discharge process is simple. It only needs to adjust the resin of the PH sedimentation electrophoretic paint, and then discharge the clear water. We design the process flow for a domestic manufacturer: forming spring → shot blasting → → hanging tool → alkaline degreasing → double water washing → (slightly acid 1% neutralization) phosphating → double water washing → double deionized water washing → cathode system Polyurethane colorful electrophoretic paint→recovering→double water washing→assisting washing→baking and curing→under hanging tools.
 
  Result: The particles of shot blasting will be clamped in the gap between the two ends of the stainless steel Extension spring. Shot peening causes a rough appearance, and the paint layer should be thickened accordingly to have a bright and flat appearance, with a thickness of 10-20 microns, which in turn causes the shortened thickness of the spring to become smaller. Phosphating will cause hydrogen embrittlement and reduce the service life of stainless steel tension springs.
 
Improvement process: forming spring → lye polish degreasing → centrifugal water drop → hanging → alkaline degreasing → double water washing → (slightly acid neutralized 1%) phosphating → double water washing → double deionized water washing → cathode system Polyurethane colorful electrophoretic paint→recovering→double water washing→assisting washing→baking and curing→under hanging tools.
 
   Finishing (finishing) process is to put the stainless steel Extension spring directly into the skew centrifugal, spiral oscillation, vortex and other series of finishing machines, and add appropriate abrasives, abrasives and water for finishing. The polished appearance is smoother than that of shot blasting. In addition, traditional processes such as degreasing, cleaning, pickling, phosphating, dehydrogenation, etc. are reduced, the production process is simplified, and the rusting time of the spring in the production process is less, and pickling is unnecessary. The thickness of the paint on the exterior can be controlled at about 10 microns.