The effects of hydrogen traps, permeation temperature and sample thickness on hydrogen diffusion coefficient in Q960 clean steel were studied using a method of electrochemical hydrogen permeation. Experimental results show that hydrogen traps can extend hydrogen penetration time, and hydrogen traps can reduce hydrogen diffusion coefficient in Q960 clean steel. The effect of reversible hydrogen traps on the hydrogen diffusion coefficient is greater than that of irreversible hydrogen traps. The apparent activation energy of hydrogen diffusion is 26 056 J/mol in Q960 clean steel. The hydrogen diffusion coefficient is independent of the sample thickness of Q960 clean steel.
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