SYNERGISM EFFECT OF THIOBACILLUS FERROOXIDANS AND THIOBACILLUS THIOOXIDAN ON THE CORROSION BEHAVIOR OF STEEL Q235

J Chin Soc Corr Pro

2009, Vol. 29

Issue (3): 182-186 DOI:

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SYNERGISM EFFECT OF THIOBACILLUS FERROOXIDANS AND THIOBACILLUS THIOOXIDAN ON THE CORROSION BEHAVIOR OF STEEL Q235

LI Songmei; WANG Yanqing; LIU Jianhua; LIANG Xin

School of Materials Science and Engineering;Bei Hang University; Beijing 100083

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Abstract

The weight loss method, electrochemical impedance spectroscopy and surface analysis methods (SEM) were employed to investigate the synergism effect of Thiobacillus ferrooxidans （T.f）and Thiobacillus thiooxidan （T.t）on the corrosion behavior of steel Q235. The results showed that the combined effect of Thiobacillus ferrooxidans and Thiobacillus thiooxidan obviously accelerated the general corrosion rate of steel Q235, weight loss in the mixed colonies system was greater than that caused by each single microorganism. The result of SEM indicated that there was no pitting occurred on the coupon immersed in the Thiobacillus Thiooxidan solution while pitting holes of steel Q235 in the mixed colonies system were smaller and lower than that in the Thiobacillus ferrooxidans system. The presence of Thiobacillus Thiooxidan decreased the pitting corrosion of Q235 steel.

Key words: microbiologically influenced corrosion Thiobacillus ferrooxidans Thiobacillus thiooxidan impedance spectroscopy synergism

Received: 12 September 2007

ZTFLH:

TG17

Corresponding Authors: LI Songmei E-mail: songmei\_li@buaa.edu.cn

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Cite this article:

LI Songmei WANG Yanqing LIU Jianhua LIANG Xin. SYNERGISM EFFECT OF THIOBACILLUS FERROOXIDANS AND THIOBACILLUS THIOOXIDAN ON THE CORROSION BEHAVIOR OF STEEL Q235. J Chin Soc Corr Pro, 2009, 29(3): 182-186.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2009/V29/I3/182

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