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中国腐蚀与防护学报  2012, Vol. 32 Issue (5): 369-374    
  研究报告 本期目录 | 过刊浏览 |
溶液状态对模拟剥离涂层底部Q345钢阴极极化行为的影响
吴志斌,魏英华,李京,孙超
中国科学院金属研究所 金属腐蚀与防护国家重点实验室 沈阳 110016
EFFECT OF SOLUTION STATE ON CATHODIC POLARIZATION BEHAVIOR OF Q345 STEEL BENEATH SIMULATED DISBONDED COATING
WU Zhibin, WEI Yinghua, LI Jing, SUN Chao
State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
全文: PDF(1123 KB)  
摘要: 

采用分段电极测量阴极保护下矩形模拟剥离涂层底部Q345钢的电位和电流的分布。研究扰动、溶液氧含量和溶液初始pH值对缝内阴极极化行为的影响。结果表明,扰动作用能够迫使本体溶液中的氧进入缝内,降低缝内Q345钢的阴极极化程度。在低电导率溶液中,扰动作用能够在缝内诱发明显的氧浓差腐蚀电池,加剧缝底部Q345钢的腐蚀。本体溶液氧含量以及溶液初始pH值对缝内Q345钢的最终阴极极化水平影响很小。

关键词 阴极保护缝隙腐蚀扰动氧含量pH值    
Abstract

Potential and current distributions in a cathodically polarized crevice between a simulated disbonded coating and segmented Q345 steels were measured in this paper. The effects of agitation, oxygen concentration and pH value of initial solution on cathodic polarization behavior were studied. The results showed that agitation forced the oxygen in bulk solution to enter the crevice, thus degrading cathodic polarization level of Q345 steels in crevice. In low conductivity solution, agitation caused oxygen concentration cells in crevice, and aggravated corrosion at the rear of crevice. The oxygen concentration and initial solution pH had little influence on the final cathodic polarization level of Q345 steels beneath the simulated disbonded coating.

Key wordscathodic protection    crevice corrosion    agitation    oxygen concentration    pH value
收稿日期: 2011-10-09     
ZTFLH:  TG172  
基金资助:

中国科学院知识创新工程重要方向项目(KGCX2-YW-219)资助

通讯作者: 魏英华     E-mail: yhwei@imr.ac.cn
Corresponding author: WEI Yinghua     E-mail: yhwei@imr.ac.cn
作者简介: 吴志斌,男,1987年生,硕士,研究方向为材料的腐蚀与防护

引用本文:

吴志斌,魏英华,李京,孙超. 溶液状态对模拟剥离涂层底部Q345钢阴极极化行为的影响[J]. 中国腐蚀与防护学报, 2012, 32(5): 369-374.
WU Zhibin, WEI Yinghua, LI Jing, SUN Chao. EFFECT OF SOLUTION STATE ON CATHODIC POLARIZATION BEHAVIOR OF Q345 STEEL BENEATH SIMULATED DISBONDED COATING. Journal of Chinese Society for Corrosion and protection, 2012, 32(5): 369-374.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2012/V32/I5/369

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