Influence of Cu2+ on sulfate-reducing bacteria associated with magnesium alloy

被引：8

作者：

Fang, S. J. ^{[1
]}

Liu, Y. H. ^{[1
]}

Diao, L. H. ^{[1
]}

Yu, S. R. ^{[1
]}

Zhang, J. ^{[1
]}

机构：

[1] Jilin Univ, Dept Mat Sci & Engn, Key Lab Automobile Mat Minist Educ, Changchun 130025, Peoples R China

来源：

ISIJ INTERNATIONAL | 2007年 / 47卷 / 11期

关键词：

corrosion; Cu2+; sulfate-reducing bacteria; magnesium alloy;

D O I：

10.2355/isijinternational.47.1647

中图分类号：

TF [冶金工业];

学科分类号：

0806 [冶金工程];

摘要：

Influence of Cu2+ on sulfate-reducing bacteria associated with magnesium alloy was investigated. X-ray diffraction results reveal that the reaction products of magnesium alloy from the SRB and sterile medium containing Cu2+ consist of Mg(OH)(2) and Cu phases. Cu2+ can inhibit the growth of SRB, but it can not die out SRB cells in biofilm and medium. Cu2+ is a deleterious ion, which can form Cu-Mg micro-galvanic corrosion electrocircuits on substrate surface leading to the severe corrosion of magnesium alloy. Although extracellular polymeric substances (EPS) of SRB have the ability to bind Cu2+, severe micro-galvanic corrosion was still observed on magnesium alloy surface. This indicates that Cu2+ can not act as a sterilization reagent or a composition of sterilization reagent for SRB associated with magnesium alloy.

引用

页码：1647 / 1651

页数：5

共 14 条

[1]

*ASTM, 1975, STAND REC PRACT PREP, P626

[2]

Corrosion of technical materials in the presence of biofilms - current understanding and state-of-the art methods of study [J].