AN XPS STUDY OF Cr-Al COMPOSITE PASSIVE FILMS

J Chin Soc Corr Pro

1997, Vol. 17

Issue (1): 77-80 DOI:

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AN XPS STUDY OF Cr-Al COMPOSITE PASSIVE FILMS

CHEN Caijin JI Zhenguo YU Kaiping (Materials Science and Engineering Department; Zhejing University)

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Abstract The passive films on Fe-Cr, Fe-Al, Fe-Cr-Al and Fe-Mn-Al-Cr alloys were studied by anodic polarization curve measurements in 0.5mol/L H2SO4 and by XPS analysis. It was shown that Al and Cr are enriched at the surface for all these films. The enrichment factor of chromium at the film surface, ηCr, for Fe-5Cr alloy was 3.7, and 2.22 for Fe-5Cr-3Al alloy. The 90 for Fe-26Mn-3Al-6Cr alloy was 3.53, which implied that under this condition aluminium did not suppress the enrichment of chromium. The passive film on Fe-Mn-Al-Cr alloy was superior to that on Fe-Cr alloy and was much better than that on Fe-Cr-Al alloy with the same contents of Cr and Al.

Key words: Composite passivation film XPS Stainless steel

Received: 25 February 1997

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CHEN Caijin JI Zhenguo YU Kaiping (Materials Science and Engineering Department; Zhejing University). AN XPS STUDY OF Cr-Al COMPOSITE PASSIVE FILMS. J Chin Soc Corr Pro, 1997, 17(1): 77-80.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1997/V17/I1/77

1 陈才金等.一种铁-锰-铝-铬不锈钢,中国专利号:85105573.7,1985
2 Marcus P, Cudar J. In: Froment M ed. Passivity of Metals and Semiconductors, Amsterdam Netherland: Elsevier Science Pubishers B. V., 1983. p119O

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