ANACYSIS OF HYDROGEN ATTACK ACTIVATION ENERGY AND WELDING SEAM HYDROGENATTACK FOR 15CrMo STEEL
LI Xiaogang; (Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences.Shenyang 110015) CHEN Hua; MENG Qinghai; YAO Zhiming; LI Jin; KE Wei (State Key Laboratory of Corrosion and protection; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang 110015) (Fushun Petroleum Institute; Fushun 113001)
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LI Xiaogang; (Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences.Shenyang 110015) CHEN Hua; MENG Qinghai; YAO Zhiming; LI Jin; KE Wei (State Key Laboratory of Corrosion and protection; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang 110015) (Fushun Petroleum Institute; Fushun 113001). ANACYSIS OF HYDROGEN ATTACK ACTIVATION ENERGY AND WELDING SEAM HYDROGENATTACK FOR 15CrMo STEEL. Acta Metall Sin, 1995, 31(22): 455-459.
Abstract The activation energies of decarburization and hydrogen attack of 15CrMo steel exposed under 18 MPa H2 and at 300, 350, 400, 450 and 500℃ for different time were evaluated. Both activation energies have similar value. This is believed that the hydrogen attack reaction is controlled by the diffusion of C-atom. The hydrogen attack in the welding affected zone is more obvious than that of matrix.