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1·Pit corrosion; Fatigue; Failure analysis;

点蚀； 疲劳； 失效分析；

2·The check and the analysis of the pattern of corrosion pit indicated that it was pit corrosion.

对支撑梁蚀坑形貌的检查和分析表明该腐蚀为小孔腐蚀。

3·The anode polarization curve of A0 pure aluminum in DI (de-ions) water was measured to simulate the pit corrosion of reactor pool shell.

测量A0纯铝在去离子水中的极化曲线用来模拟反应堆池壳的点蚀。

4·There are the various damages on the gear surfaces of triplex pumps made in China, especially, there exist a lot of phenomena of the pit corrosion.

国产三缸泵的齿轮齿面损伤严重，尤其以点蚀现象居多。

5·The results show that the stress corrosion is the main failure causing of the bellows expansion joint, while the local pit corrosion, residual stress and the working stress is the necessary condition.

结果表明，应力腐蚀是该膨胀节失效的主要原因，而局部的点蚀和残余应力、工作应力是应力腐蚀的必要条件。

6·The pit then grows through the compressive layer, and the change in residual stress state and the pit geometry initiate stress corrosion cracking.

随后斑点穿过压缩层继续扩展，剩余应力发生改变，斑点最终导致应力腐蚀裂纹。

7·The stress concentration caused by the corrosion pit was numerically analyzed.

分析了锈蚀坑存在造成钢筋应力分布变化的规律。

8·The result show that the size of equivalent initial surface crack is less than 19.7to 22.5 percent of surface corrosion pit size which have the same life.

结果发现，把腐蚀坑等效为具有相同寿命的表面裂纹时，等效表面裂纹的尺寸比对应腐蚀的尺寸小19.7% - 22.5%。

9·It is difficult to maintenance the wire communication device in the pit because the ground is wet, cable corrosion is serious and sign al is bad.

由于煤矿井下地面潮湿，电缆腐蚀严重，信号不好，有线通信装置维护困难。