EFFECT OF HYDROGEN AND STRESS ON ANODIC DISSOLUTION

J Chin Soc Corr Pro

1996, Vol. 16

Issue (3): 187-194 DOI:

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EFFECT OF HYDROGEN AND STRESS ON ANODIC DISSOLUTION

HU Xiaoli;HUANG Zhenzhong;QIAO Lijie;CHU Wuyang (University of Science and Technology; Beijing)

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Abstract Effects of hydrogen and stress on anodic dissolution for mild steel in 1 mol/L NH4NO3 solution were investigated under various potentials corresponding to active, active-passive transition, passive and transpassive regions respectively on the polarization curve. The results showed that hydrogen decreased the dissolution rate in the active region but increased the rate in the passive and transpassive regions and increased the rate tremendously in the active-passive transition region. They were consistant with the effects of hydrogen on electrochemical impedance. Constant stress σ=1.1 σys increased the dissolution rate only by 2% in the active region but 30～70% in the active-passive transition region. The effects of hydrogen and stress on the dissolution rate were synergistic rather than simply additive and the effect in the transition region was far greater than that in the active region.

Key words: Hydrogen Stress Anodic dissolution Mild steel

Received: 25 June 1996

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HU Xiaoli;HUANG Zhenzhong;QIAO Lijie;CHU Wuyang (University of Science and Technology; Beijing). EFFECT OF HYDROGEN AND STRESS ON ANODIC DISSOLUTION. J Chin Soc Corr Pro, 1996, 16(3): 187-194.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1996/V16/I3/187

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