Corrosion resistance of stainless steel depends on chrome? Corrosion resistance of stainless steel depends on chrome, but because chromium is an integral part of the steel, so the protection methods vary. Stainless steel when the addition amount reached 10.5% chromium spring wire, atmospheric corrosion resistance of steel significantly increased, but a higher chromium content, while still being improved corrosion resistance, but not obvious. The reason is that when using chrome steel alloying treatment, the type of change has become similar to the surface of the oxide surface oxides formed on pure chromium metal. Chromium-rich oxide protective surface such tight adhesion to prevent further oxidation. This oxide layer is very thin, it can be seen through the natural sheen of steel surfaces of stainless steel has a unique surface. Moreover, if the surface is damaged, and atmospheric reactions exposed steel surface will self-repair, re-formation of this "passive film", continue to play a protective role. In recent years. To solve candle intergranular corrosion and stress corrosion of austenitic stainless steel, they were developing a low carbon stainless steel and super ferrite stainless steel. Currently, the species has been put into the stainless steel market has reached more than 230 kinds, there are nearly 50 kinds of commonly used, of which about 80% are austenitic stainless steel (18 --8 chromium nickel) derivatives of high quality stainless steel spring wire, and The remaining 20% ??are made of chrome steel evolved from the 13's. The main research and development on stainless steel is to focus on two aspects: ◆ The first is to improve the corrosion resistance of steel, where the study of intergranular corrosion Steel 18-8 candle problem, not only the development of the steel proposed to solve this problem of inter-process method. Also contributed to the research related to the mechanism of passivation and corrosion of stainless steel. ◆ The second aspect is the development of high strength stainless steel (ie, precipitation hardening stainless steel) stainless steel spring wire, this steel is after World War II with the progress of aviation, aerospace and rocket technology and developed. Semi-austenitic precipitation hardening stainless steel which has excellent process performance (17-7PH class), after solution treatment easily forming process, and the subsequent strengthening heat treatment (aging) is not high temperature deformation is small, this steel in the United States used for aerospace structures, and has a lot of production, countries also have similar kinds of steel put into use. 0.2 stainless steel spring wire stainless steel spring wire _ _ Shengyuan Stainless provided by Dongguan Shengyuan stainless steel. Shengyuan Stainless Steel Co., Ltd. of Dongguan City (dg-shengyuan.cn) strong, credible, in Dongguan, Guangdong metal packaging machinery industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving Shengyuan innovative ideas will lead you hand into the brilliant stainless steel and a better future!