CORROSION RESISTANCE OF N Cr Mn STEEL SMELTED BY USING PLASMA
等离子体冶炼的N─Cr─Mn钢的耐腐蚀性能

Various nitrogen containing stainless steels have been smelted by using nitrogen plasma. The corrosion resistances of the steels were measured by electrochemical methods, such as potentiodynamic scanning and electrochemical impetance were compared with 1Cr18Ni9 stainless steel. The experimental results indicated that the N containing stainless steels had much better corrosion resistance than that of 1Cr18Ni9 stainless steel. With increasing the N content in steel, the austenitic phase was enlarged and then the corrosion resistance of the steel increased. When the nitrogen content in steel reached 0.74% , a complete austenitic phase in steel was formed. After anodization, the austenitic phase in corroding layer on steel surface was larger than in original bright surface, and then a compact film was formed.