Corrosion behaviour of the microbially modified surface of 5083 aluminium alloy

被引:6
|
作者
Nkoua, C. [1 ]
Josse, C. [2 ]
Proietti, A. [2 ]
Basseguy, R. [3 ]
Blanc, C. [1 ]
机构
[1] Univ Toulouse, CNRS, INP, ENSIACET,CIRIMAT, 4 Allee Emile Monso,CS 44362, F-31030 Toulouse 4, France
[2] Univ Toulouse, CNRS, INP, UPS,INSA,UAR Raimond Castaing, 3 Rue Caroline Aigle, F-31400 Toulouse, France
[3] Univ Toulouse, CNRS, INP, LGC,UPS, 4 Allee Emile Monso,CS 44362, F-31030 Toulouse 4, France
关键词
A; aluminium; intermetallics; B; polarization; C; pitting corrosion; microbiological corrosion; AL-MG ALLOYS; INTERMETALLIC PHASES; PERFORMANCE; AA5083;
D O I
10.1016/j.corsci.2022.110812
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The influence of microorganism-induced surface modifications on the corrosion behaviour of 5083 H11 aluminium alloy was studied. Pre-immersion in natural seawater (between 15 days and 2 months) led to the growth of a dense oxy-hydroxyde layer on the AA5083 surface. This layer led to a decrease in the cathodic and corrosion current densities, and an increase in the passivity domain on the polarisation curves plotted in chloride-containing sulphate solution for pre-immersed samples compared to bare samples. This improvement in the corrosion behaviour of AA5083 depended on the alloy microstructure, and the sunlight exposure during the pre-immersion in natural seawater.
引用
收藏
页数:16
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