PITTING BEHAVIOUR OF TYPE 43O STAINLESS STEEL IN SOLUTIONS CONTAINING Cl~- AND CO_2

J Chin Soc Corr Pro

1996, Vol. 16

Issue (4): 311-315 DOI:

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PITTING BEHAVIOUR OF TYPE 43O STAINLESS STEEL IN SOLUTIONS CONTAINING Cl~- AND CO_2

FU Chaoyang; PENG Fanging; LU Zhanpeng; ZHENG Jiashen (Huazhong University of Science and Technology; Wuhan 430074)

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Abstract The characteristics of pitting corrosion and corrosion mechanism for type 430 stainless steel in different solutions were studied using the electrochendcal potentiodynamic hysteresis curve technique. Inhibition performance of some inhibitors was also examined. Experimental results showed that increase in concentration of Cl-and solution temperature could accelerate the pitting of 430ss. Oxygen was one of the principal factors to keep passivity of the steel. CO2 was an accelerant for pitting. Na2MoO4 and Na3VO4 could prevent the pitting corrosion in solution containing Cl-and CO2, and they had a synergistic inhibition effect.

Key words: 430 stainless steel Pitting Inhibition

Received: 25 August 1996

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FU Chaoyang; PENG Fanging; LU Zhanpeng; ZHENG Jiashen (Huazhong University of Science and Technology; Wuhan 430074). PITTING BEHAVIOUR OF TYPE 43O STAINLESS STEEL IN SOLUTIONS CONTAINING Cl~- AND CO_2. J Chin Soc Corr Pro, 1996, 16(4): 311-315.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1996/V16/I4/311

1杨德钧．材料保护,1990,23(1~2):292侯文涛．中国腐蚀与防护学报,1984,4:27o3BondAP,LizlorsEA．J．Electrochem．Soc,1986,115:11304陈旭俊等．中国腐蚀与防护学报,1992,12:213

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