采用慢应变速率拉伸试验研究了HR3C钢焊接接头的应力腐蚀行为,并测试了接头在不同介质中的应力-应变曲线和电化学腐蚀电位。结果表明,与空气介质相比,Na Cl溶液中的HR3C钢焊接接头应力腐蚀行为显著增大,说明Cl-对接头的应力腐蚀敏感性有较大的影响,而在酸性介质中接头应力腐蚀敏感性比在弱碱性介质中稍大一些。 The stress corrosion behavior of welded joints of HR3C steel was studied by slow strain rate tensile test, and the stress-strain curves and electrochemical corrosion potentials of joints in different media were tested. The results show that compared with the air medium, the stress corrosion behavior of welded joints of HR3C steel in NaCl solution significantly increases, indicating that Cl- has a greater impact on the stress corrosion susceptibility of joints, while in acidic medium, the joint stress corrosion sensitivity Sex is slightly larger than in slightly alkaline media.