研究了WFG362钢和A537CL1海洋平台用钢在海水中阴极保护下裂纹扩展的特征。实验结果表明:Ca,Mg沉淀物对裂纹扩展有阻碍作用,使裂纹扩展速率不再随ΔK单调上升,扩展速率曲线成V字型,在一定的ΔK值下扩展速率达到最小值。此外沉积物的作用也使最佳阴极保护电位区间发生了变化,-800—-900mV和-1100—-1500mV为海水中这种材料的最佳保护电位区间,-950—-1000mV范围内为十分有害的区间。
The fatigue crack growth feature of the offshore steels WFG36Z andA537CL1 under cathodic protection in sea water environment has been investigated.The deposits of Ca and Mg compounds were found to retard the rate of crack growthwhich will be no longer increasing monotonously against △K, but form V-shaped curve with a minumum crack growth rate at certain value of △K. Moreover,the optimum protection potential range may be changed by the action of deposits.The best range for the steels WFG36Z and A537CL1 in sea water environment is-800—-900 and -1100—-1500 mV respectively, and the harmful range seems to bewithin -950—-1000mV.
参考文献
| [1] | |
| [2] | |
| [3] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%