介质和阴极保护电位对12CrNi3MoV钢长短疲劳裂纹扩展行为的影响

中国腐蚀与防护学报

1992, Vol. 12

Issue (4): 371-376

研究报告

本期目录 | 过刊浏览

介质和阴极保护电位对12CrNi3MoV钢长短疲劳裂纹扩展行为的影响

王海江;杨世伟

哈尔滨船舶工程学院;哈尔滨船舶工程学院

THE INFLUENCE OF BRINE AND CATHODIC PROTECTION POTENTIAL ON THE LONG AND SHORT FATIGUE CRACK GROWTH BEHAVIOUR OF 12CrNi3MoV STEEL

Wang Haijiang and Yang Shiwei(Harbin Shipbuilding Engineering Institute)

全文: PDF(422 KB)

摘要: <正> 一、前言船体钢在海水中的腐蚀疲劳是船舶结构破坏的主要形式。设计舰船壳体阴极保护系统时通常着眼于防腐蚀效果,并不考虑对船体结构强度的影响。已有的研究资料指出,阴极保护可提高光滑试佯的腐蚀疲劳强度,但对疲劳裂纹扩展速率影响的看法存在分岐。有人认为,阴极保护加速疲劳裂纹扩展;也有人认为,在一定条件下阴极保护会阻碍疲劳裂纹扩展。本工作在实验室条件下研究介质和阴极保护电位对长、短疲劳裂纹扩展行为的影响。二、材料及试验方法试材采用调质态12CrNi3MoV钢,化学成份见表1,机械性能见表2。

Abstract：The long and short fatigue crack growth(FCG) of 12CrNi3MoV steel was investigated under cathodic protection(CP) in 3.5％NaCl solution. The results indicated that the long FCG was different from the short one in brine and under cp. In salt water, the short FCG rate increased while the long FCG rate decreased. The short FCG was apparently hindered at appropriate CP potential (—900mV, SCE) and accelerated at over-protection potential (—1200mV, SCE). On the contrary, CP increased the long FCG rate and the more negative the CP potential, the greater was the long FCG rate. The short FCG rate was greater than the long one at the same ΔK and the difference increased in salt water, but decreased under CP. Finally the oxygen trans-portation, the wedging of corrosion products and the hydrogen embrittlement effect in both long and short crack tips were discussed.

收稿日期: 1992-08-25

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引用本文:

王海江;杨世伟. 介质和阴极保护电位对12CrNi3MoV钢长短疲劳裂纹扩展行为的影响[J]. 中国腐蚀与防护学报, 1992, 12(4): 371-376.
. THE INFLUENCE OF BRINE AND CATHODIC PROTECTION POTENTIAL ON THE LONG AND SHORT FATIGUE CRACK GROWTH BEHAVIOUR OF 12CrNi3MoV STEEL. J Chin Soc Corr Pro, 1992, 12(4): 371-376.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1992/V12/I4/371

[1] 中科院金属腐蚀与防护研究所研究报告,海洋工程用钢及焊缝腐蚀开裂敏感性与防护,内部资料.1988年
[2] 中科院金属腐蚀与防护研究所编,海洋环境中金属的腐蚀疲劳,内部资料,1988年
[3] Parkings,R.N.,Corrosion Processes,Applied Science Publishers,P209,(1982)
[4] Hartt.W.H.,Material Performance,20(11) ,53(1981)
[5] Bardel,E.,Proceedings of Offshore Sceels Conference,Welding Institute,England,November,P415,(1978)
[6] 铃木杨之助,防食技术,33(7) ,402(1984)

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