用电化学极化测试技术、慢应变速率拉伸试验研究了 管道钢(16Mn钢)在近中性pH值溶液中的应力腐蚀行为，并探讨了外加电位、CO2、温度等 因素的影响.结果表明，应力腐蚀开裂为氢脆型应力腐蚀开裂；随着阴极电位的增加SCC敏 感性增大，溶液中加入CO2后对应力腐蚀有着明显的促进作用.
The stress corrosion cracking (SCC) behavior of pipe line steel (16Mn) in different solutions with near neutral pH values was studied with slow strain rate testing and electrochemical polarization technique.The ef fect of applied potential, CO2 content and temperature on SCC behavior were in vestigated.The results showed that the crack development was mainly controlled b y hydrogen-embrittlment stress corrosion cracking.Susceptibility to SCC increase d as the cathodic potential increased.The addition of CO2 to the solution also increased veidently the SCC.
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