Galvanic Corrosion of Brass /steel 907A Couple in Artificial Seawater

Galvanic Corrosion of Brass /steel 907A Couple in Artificial Seawater
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人工海水中黄铜/钢 907A 的电偶腐蚀

DOI:
10.20964/110437
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发表时间:
2016-05
影响因子:
1.5
通讯作者:
Chunan Cao
Chunan Cao
中科院分区:
化学4区
文献类型:
--
作者:
Li Jiang;Qingsong Yang;Xiaoqing Du;Zhen Xu;Yu Chen;Zhao Zhang;Jianqing Zhang;Chunan Cao

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采用电化学阻抗谱和电化学噪声技术研究了不同阴阳极面积比的黄铜/907 A钢电偶腐蚀行为。实验结果表明,电偶腐蚀在初始24 h内加速,随后(26 h ~ 720 h)逐渐减弱。用能量分布图(EDP)表征了产物的成核、生长和成膜过程,并采用两个参数(n1和n2)区分成核和生长过程。根据n1和n2的变化趋势,将电偶腐蚀过程分为波动阶段和稳定阶段。随着阴/阳极面积比的增大,黄铜/907 A钢电偶的腐蚀速率增大,波动阶段的时间延长。
Galvanic corrosion of brass /steel 907A couples with various cathode /anode area ratios were examined by electrochemical impedance spectroscopy and electrochemical noise technique. Experimental results show that the galvanic corrosion of couples accelerate within the initial 24h, and then decrease in the later time (from 26h to 720h). The products nucleation, growth, film formation stages are characterized using energy distribution plots (EDP) and two parameters (n1 and n2) are adopted to differentiate the nucleation and growth processes. According to the variation tendency of n1 and n2, galvanic corrosion process are divided into fluctuating stage and stabilization stage. As the cathode /anode area ratios increase, the corrosion rates of brass /steel 907A couples increase and the period of fluctuating stage lengthens.
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发表时间: 2015-11
期刊: Geothermics
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