Abstract

Alternating current accelerates stress corrosion cracking of grade X70 pipe steel in electrolytes of various compositions: 3.5% NaCl solution (pH 7), citrate buffer (pH 5.5), and a mixture of NS4 solution with borate buffer (pH 7). The increase in crack growth rate upon static load and deterioration of steel crack resistance during constant extension rate testing correlate with an increase in the metal corrosion rate.

中文翻译：

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交流电对X70级管钢应力腐蚀开裂的影响

摘要

交流电加速了X70级钢管在不同成分的电解质中的应力腐蚀开裂：3.5％NaCl溶液（pH 7），柠檬酸盐缓冲液（pH 5.5）以及NS4溶液与硼酸盐缓冲液（pH 7）的混合物。静载荷下裂纹扩展速率的增加和在恒定延伸率测试过程中耐钢裂纹性的降低与金属腐蚀速率的增加有关。