Brass dezincification with a bipolar electrochemistry technique

被引：21
|
作者：
Zhou, Yiqi [1 ]
Mahmood, Sultan [2 ]
Engelberg, Dirk Lars [1 ,2 ]
机构：
[1] Univ Manchester, Dept Mat, Corros & Protect Ctr, Manchester M13 9PL, Lancs, England
[2] Univ Manchester, Mat Performance Ctr, Manchester M13 9PL, Lancs, England
来源：
SURFACES AND INTERFACES | 2021年 / 22卷
基金：
英国工程与自然科学研究理事会;
关键词：
Bipolar electrochemistry; dezincification; potentiodynamic polarisation; SEM/Raman/GI-XRD;
D O I：
10.1016/j.surfin.2020.100865
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A bipolar electrochemistry approach was applied to characterise the dezincification of brass. The dissolution of both Cu and Zn resulted in the formation of Cu2O, CuO, ZnO and CuClx, with corrosion product formation characterised as a function of the potential gradient. At low potentials, protective corrosion products formed, with compositional changes observed via dezincification up to a critical applied potential threshold. Above the critical potential, no corrosion products could form, resulting in higher corrosion rates. The influence of corrosion product formation after bipolar electrochemistry assessment is compared to results from standard three-electrode potentiodynamic polarisation tests.
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页数：8
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