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用等离子氮弧冶炼不同氮含量的铬锰不锈钢，其耐腐蚀性能用动电位扫描、电化学阻抗等方法测试，并与１Ｃｒ１８Ｎｉ９不锈钢作比较，结合显微组织分析耐蚀原因。实验结果表明含氮钢的耐蚀性普遍好于１Ｃｒ１８Ｎｉ９不锈钢。随钢中含氮量增加，奥氏体组织扩大，耐腐蚀性能提高。当含氮量达０．７４％时形成完全的奥氏体相。经阳极极化后，含氮钢表面的腐蚀层中奥氏体相比原基体的扩大，膜致密，耐腐蚀性能远远高于原基体。
The Cr-Mn stainless steel with different nitrogen content was smelted by plasma nitrogen arc. The corrosion resistance of the Cr-Mn stainless steel was tested by potentiodynamic scanning and electrochemical impedance. The corrosion resistance was compared with that of 1Cr18Ni9 stainless steel. The experimental results show that the corrosion resistance of nitrogen-containing steel is generally better than 1Cr18Ni9 stainless steel. With the increase of nitrogen content in steel, austenite expands and the corrosion resistance improves. A complete austenite phase is formed when the nitrogen content reaches 0.74%. After anodic polarization, the corrosion layer of nitrogen steel on the surface of the austenite compared to the original matrix to expand, the film is dense, corrosion resistance is much higher than the original matrix.