Stress corrosion cracking (SCC) of TP95S tube steel was investigated through electrochemical measurement and electrochemical hydrogen charging, as well as immersion corrosion and slow strain rate tensile tests. The SCC mechanism of TP95S steel in the acidic gas field solution is mixed controlled by anodic dissolution (AD) and hydrogen embrittlement (HE). The SCC susceptibility of TP95S is lower at 100 °C than that at 60 °C because of abated HE. When the tensile stress reaches more than 70% of the yield strength of TP95S tube steel, TP95S exhibits SCC. Thus, stress applied to TP95S tube steel in service should be lower than 70% and 50% of the yield strength at 100 °C and 60 °C, respectively. Furthermore, tensile stress decreases the service life of TP95S tube steel in the acidic gas field.

中文翻译：

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TP95S管钢在酸性气田环境中的应力腐蚀开裂行为

通过电化学测量和电化学充氢，浸入腐蚀和慢应变速率拉伸试验研究了TP95S管钢的应力腐蚀开裂（SCC）。TP95S钢在酸性气田溶液中的SCC机理是通过阳极溶解（AD）和氢脆（HE）混合控制的。TP95S的SCC敏感性在100°C时比在60°C时低，这是因为HE减弱了。当拉伸应力达到TP95S管钢屈服强度的70％以上时，TP95S会显示出SCC。因此，在使用中的TP95S管钢上施加的应力应分别低于100°C和60°C时屈服强度的70％和50％。此外，拉伸应力会降低TP95S管钢在酸性气田中的使用寿命。