INVESTIGATION OF ELECTROCHEMICAL CORROSION BEHAVIOR OF A NEW TYPE OF Fe-Mn-Al-Cr STAINLESS STEELS

J Chin Soc Corr Pro

1999, Vol. 19

Issue (3): 161-166 DOI:

Research Report

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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

Key words: Fe-Mn-Al-Cr steel stainless steel corrosion resistance aqueous solution

Received: 03 August 1998

Corresponding Authors: Weili Liu

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Weili Liu. INVESTIGATION OF ELECTROCHEMICAL CORROSION BEHAVIOR OF A NEW TYPE OF Fe-Mn-Al-Cr STAINLESS STEELS. J Chin Soc Corr Pro, 1999, 19(3): 161-166 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1999/V19/I3/161

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