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INVESTIGATION OF ELECTROCHEMICAL CORROSION BEHAVIOR OF A NEW TYPE OF Fe-Mn-Al-Cr STAINLESS STEELS |
Weili Liu; |
浙江大学材料系 |
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Abstract A series of new type Fe-Mn-Al-Cr stainless steels,which were cheaper than the steel containing 26% Mn, were designed.Their anodic polarization curves in 0.5mol/L H2SO4, 1mol/L HNO3,1mol/L Na2SO4 and 2mol/L NaOH showed that these new materials had better corrosion resistance than the former 26% Mn steel.The increase in chromium content did not monotonously improve their corrosion resistance.When the chromium content reached to a certain value ferrite appeared and the passivity of alloy decreased.XPS was applied to study the study the structure of passive film formed in 0.5mol/L H2SO4 .From the tests we wold conclude that the outer layer of the film was mainly composed of metal oxides and hydrates and its inner layer was metal oxides.Cr18Ni9Ti
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Received: 03 August 1998
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Corresponding Authors:
Weili Liu
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1 Altstetter C J; Bentley A P; Kirbride A N. Material Science and Engineering, 1986, 82: 13 2 Gao Y J, Wu J K. Corrosion Prevention & Control, 1997, 4: 56 3朱雪梅,钟喝晖,张彦生.中国腐蚀与防护学报,1996,16(4):256 4陈才金.一种铁-锰-铝-铬不锈钢.中国专利号85105573.7,1985 5陈才金,俞开平,季振国.中国腐蚀与防护学报,1997,17(1):77 6陈才金,刘卫丽.浙江大学学报(待发表) 7 H.克舍.金属腐蚀,北京:化学工业出版社, 1984. p264 8 Katsuhisa Sugimoto, Shiro Matsuda.J. Electrochem. Soc, 1983, 130(12): 2323 |
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