Effect of Pseudomonas fluorescens on the electrochemical behaviour of a single-phase Cu-Sn modern bronze

被引：12
|
作者：
Ghiara, G. [1 ]
Spotorno, R. [1 ]
Trasatti, S. P. [2 ]
Cristiani, P. [3 ]
机构：
[1] Univ Genoa, Dept Chem & Ind Chem DCCI, Via Dodecaneso 31, I-16146 Genoa, Italy
[2] Univ Milan, Dept Environm Sci & Policy, V Celoria 2, I-20133 Milan, Italy
[3] Ric Sistema Energet RSE SpA, Via Rubattino 54, I-20134 Milan, Italy
来源：
CORROSION SCIENCE | 2018年 / 139卷
关键词：
Copper tin alloy; EIS; Polarization; Raman spectroscopy; SEM; Microbiological corrosion; Passive films; DIFFERENTIAL IMPEDANCE ANALYSIS; MICROBIOLOGICALLY INDUCED CORROSION; PUTIDA CZ1; COPPER; WATER; BIOCORROSION; MECHANISM; ALLOY; STEEL; ZINC;
D O I：
10.1016/j.corsci.2018.05.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion behavior of a modern bronze (12 wt% Sn) is studied during 100 h of exposure to a Pseudomonas fluorescens culture. Bacteria colonization, preferentially occurring in the form of black spots, caused an ennoblement of the open circuit potential and a decrease of the pitting potential. Eriochalcite (CuCl2*2H(2)O) and Nantokite (CuCl) were found in the micro-pits detected under the biofilm, associated to a local pH decrease. Electrochemical measurements via impedance spectroscopy revealed a decrease of the charge transfer resistance, which is attributed to the bacteria involvement in the process of passive layer development.
引用
收藏
页码：227 / 234
页数：8
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