在役海底管线牺牲阳极失效分析

中国腐蚀与防护学报

2002, Vol. 22

Issue (1): 60-64

失效分析

本期目录 | 过刊浏览

在役海底管线牺牲阳极失效分析

李异;李永广

广州华南理工大学工控系

THE ANALYSIS FOR FAILURE Al SACRIFICIAL ANODE USED IN SEA BED PIPELINES

Yi Li;Yongguang Li

广州华南理工大学工控系

全文: PDF(142 KB)

摘要: 用恒电流试验、表面溶解形态、腐蚀产物X-ray衍射分析、扫描电镜和能谱分析，对南海油田某海底输油管道的在役铝合金牺牲阳极的使用状况进行了分析测试.结果证实，该阳极提前失效的原因是由于其组织结构存在缺陷，晶间偏析严重导致晶间腐蚀所致.

关键词 ：铝牺牲阳极, 海底管线, 失效分析

Abstract：This paper studied the present situation of WP alum inum alloy sacrificial anodes of sea bed oil-carrying pipelines in the oil field of south China sea.According to the results of potentiostatic test of anode,mic roanalysis of anode surface dissolution morphology,X-ray diffraction of anode co rrosion products,chemical analysis and SEM & EDS analysis,WP anode did not fit f or the long-term protection of ocean bottom oil-carrying pipelines.Moreover,it i s confirmed that the invalidity ahead of time mainly results from the structure defects.Solute segregation in crystal boundary results in intergr anular corrosion very seriously.

Key words： aluminum alloy sacrificial anode seabed mud pipeline a nalysis for failure anode

收稿日期: 2000-11-04

通讯作者: 李异

Corresponding author: Yi Li

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引用本文:

李异; 李永广 . 在役海底管线牺牲阳极失效分析[J]. 中国腐蚀与防护学报, 2002, 22(1): 60-64 .
Yi Li, Yongguang Li. THE ANALYSIS FOR FAILURE Al SACRIFICIAL ANODE USED IN SEA BED PIPELINES. J Chin Soc Corr Pro, 2002, 22(1): 60-64 .

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2002/V22/I1/60

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