采用电化学阻抗谱测试、慢应变速率试验和断口形貌观察等研究了温度和极化电位对10Ni5CrMo钢在海水环境中氢脆敏感性的影响。结果表明：同一温度下，随极化电位负移，电荷转移电阻减小，断裂时间、断后伸长率和断面收缩率明显降低，氢脆系数（F）增加，材料的氢脆敏感性显著增加，且当极化电位达到-1 000 mV （vs.SCE）时，氢脆系数已超过安全区允许的最高值25%，此时材料有可能发生氢脆；同一极化电位下，随温度增加，电荷转移电阻减小，断裂时间、断后伸长率、断面收缩率降低，氢脆系数增加，材料的氢脆敏感性增强；与极化电位相比，4~25℃条件下，温度对10Ni5CrMo钢的氢脆敏感性影响较小。

The effects of temperature and polarization potential on hydrogen embrittlement sensitivity of 10Ni5CrMo steel in seawater environment were studied by electrochemical impedance spectroscopy, slow strain rate test and fracture morphology observation. The results show that at the same temperature, with the negative shift of polarization potential, charge transfer resistance decreased, fracture time, percentage elongation and percentage reduction of area after fracture decreased significantly, the hydrogen embrittlement coefficient (F) increased, and the hydrogen embrittlement sensitivity of the material increased significantly. When the polarization potential reached -1 000 mV (vs. SCE), F exceeded the maximum allowable value (25%) of the safety zone, which indicated that hydrogen embrittlement of the material would happen. At the same polarization potential, as the temperature increased, charge transfer resistance decreased, fracture time, percentage elongation and percentage reduction of area after fracture decreased, F increased, and hydrogen embrittlement sensitivity of the material increased. Compared with polarization potential, temperature had little effect on the hydrogen embrittlement sensitivity of 10Ni5CrMo steel at 4-25 ℃.