CORROSION BEHAVIOR OF NANOCRYSTALLIZED BULK 304 STAINLESS STEELI. THE RESEARCH ON ANTI-CHLORIDE ION ATTACK OF THE PASSIVE FILM

J Chin Soc Corr Pro

2007, Vol. 27

Issue (2): 80-83 DOI:

Research Report

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CORROSION BEHAVIOR OF NANOCRYSTALLIZED BULK 304 STAINLESS STEELI. THE RESEARCH ON ANTI-CHLORIDE ION ATTACK OF THE PASSIVE FILM

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中国科学院金属研究所

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Abstract Nanocrystallized bulk 304 stainless steel(304ss) was prepared by the severe rolling equipment. X-ray diffraction (XRD),optical micrograph and transmission electron microscopy (TEM) were used to characterize micro-structure of materials. Meanwhile,using different electrochemical methods,such as polarization curves,electrochemical impedance spectrum (EIS),and Mott-Schottky analysis,the effect of chloride ion attack on the passive film was investigated in 0.05 mol/L H2SO4+0.05 mol/L NaCl aqueous solution. The passive film formed on surface of nanocrystallized bulk 304ss was more compact and more protective to chloride ion than that formed on its counterpart alloy. Meanwhile,the donor carrier density decreased in the passive film,which restrains the passive film electrochemical reaction and improves the passive film stability. Therefore,the nanocrystallized bulk 304ss was more protective against chloride ion attacking in 0.05 mol/L H2SO4+0.05 mol/L NaCl aqueous solution.

Key words: nanocrystallized bulk 304 stainless steel passive film semi-conductor manner chloride ion attack

Received: 08 November 2005

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. CORROSION BEHAVIOR OF NANOCRYSTALLIZED BULK 304 STAINLESS STEELI. THE RESEARCH ON ANTI-CHLORIDE ION ATTACK OF THE PASSIVE FILM. J Chin Soc Corr Pro, 2007, 27(2): 80-83 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2007/V27/I2/80

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