Citation: | ZHAO Zhengjie, ZHONG Jiru, GUAN Kaishu. Effect of Hydrogen on Electrochemical Behavior of Alloy 600 in High Temperature and High Pressure Water[J]. Corrosion & Protection, 2024, 45(9): 85-91. DOI: 10.11973/fsyfh220609 |
The effect of electrochemical hydrogen charging on the electrochemical behaviors of two 600 alloys exposed to high temperature and high pressure water for a long time were studied by overpotential polarization curve, electrochemical impedance spectroscopy and chronoamperometry. The results show that electrochemical hydrogen charging would increase the anodic oxidation current density of the alloy, and in 70 ℃ NaCl solution, 300 ℃ high temperature deoxidized pure water and high temperature deoxidized simulated primary circuit cooling water, hydrogen charging would make the corrosion potential of the alloy moving towards the negative direction and reduce the corrosion resistance. In addition, the hydrogen reduction reaction rate on the surface of the rolling annealed sample was faster, while the solution annealed sample showed better corrosion resistance in 70 ℃ NaCl solution, 300 ℃ high temperature deoxidized pure water and hydrogenated deoxidized simulated primary cooling water.
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