Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (01): 67-74. Previous Articles     Next Articles

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A3钢在氧化亚铁硫杆菌、链霉菌及其混合菌体系中的腐蚀行为

李松梅*,张媛媛,杜娟,刘建华,于美   

  1. (北京航空航天大学材料科学与工程学院空天材料与服役教育部重点实验室 北京 100191)
  • 投稿日期:2008-11-13 修回日期:2009-07-13 发布日期:2010-01-20
  • 通讯作者: 李松梅 E-mail:songmei_li@buaa.edu.cn
  • 基金资助:

    国家自然科学基金(50571003)

Influence of streptomyces on the Corrosion Behavior of Steel A3 in Thiobacillus ferrooxidans Media

Li Songmei* ,Zhang Yuanyuan, Du Juan ,Liu Jianhua, Yu Mei   

  1. (Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191)
  • Received:2008-11-13 Revised:2009-07-13 Published:2010-01-20
  • Contact: Song-Mei LI E-mail:songmei_li@buaa.edu.cn

The electrochemical measurement and surface analysis methods were carried out to investigate the corrosion behavior of steel A3 in Thiobacillus ferrooxidans, streptomyces and T. f-streptomyces mixed colony systems. Results showed that asymmetric biofilms adhered on the surface of steel A3 after 7 days of exposure in different corrosive systems; pitting corrosion occurred on the surface of steel A3 after 7 days of exposure in T. f and streptomyce solutions, but an even corrosion appeared in T. f-streptomyces mixed colony solution; weight loss in the mixed colony system was between those caused by each individual microorganisms; the electrochemical impedance spectroscopy results indicated that the impedance value of steel A3 in the mixed colony system was the medium of those in T. f and streptomyces system. Above results revealed that the most serious corrosion occurred in the streptomyces system, secondly for the T. f-streptomyces mixed colony solution, and corrosiveness of the T. f solution was the lightest to steel A3.

Key words: Thiobacillus ferrooxidans, streptomyces, mixed colonies, corrosion, electrochemical impedance spectroscopy

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