1 College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China 2 Institute of Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China
Effect of solution pH, Cl- concentration and temperature on electrochemical behavior of PH13-8Mo steel in acidic environments
1 College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China 2 Institute of Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China
ժҪ The effect of solution pH, Cl- concentration and temperature on the electrochemical corrosion behavior of PH13-8Mo steel in acidic solution was investigated by using the electrochemical tests, scanning electron microscopy and X-ray photoelectron spectroscopy. The PH13-8Mo martensitic precipitation hardened stainless steel is in the passivity state when the pH value is above 3��0, below which the anodic polarization curves of the steel are actively dissolved. The corrosion current density gradually decreases with increasing the solution pH and decreasing Cl- concentration and solution temperature. Pits are initiated on the sample surface in the presence of the Cl- and gradually developed into uniform corrosion with increasing the Cl- concentrations. Moreover, the corrosion is more serious with an increase in solution temperature.
Abstract��The effect of solution pH, Cl- concentration and temperature on the electrochemical corrosion behavior of PH13-8Mo steel in acidic solution was investigated by using the electrochemical tests, scanning electron microscopy and X-ray photoelectron spectroscopy. The PH13-8Mo martensitic precipitation hardened stainless steel is in the passivity state when the pH value is above 3��0, below which the anodic polarization curves of the steel are actively dissolved. The corrosion current density gradually decreases with increasing the solution pH and decreasing Cl- concentration and solution temperature. Pits are initiated on the sample surface in the presence of the Cl- and gradually developed into uniform corrosion with increasing the Cl- concentrations. Moreover, the corrosion is more serious with an increase in solution temperature.
Xue-ying Li,Chun-hua Fan,Qian-lin Wu,Li-hua Dong,Yan-sheng Yin,*,Chang-jun Wang,Jian-xiong Liang. Effect of solution pH, Cl- concentration and temperature on electrochemical behavior of PH13-8Mo steel in acidic environments[J].Journal of Iron and Steel Research International, 2017, 24(12): 1238-1247.
Xue-ying Li,Chun-hua Fan,Qian-lin Wu,Li-hua Dong,Yan-sheng Yin,*,Chang-jun Wang,Jian-xiong Liang. Effect of solution pH, Cl- concentration and temperature on electrochemical behavior of PH13-8Mo steel in acidic environments. , 2017, 24(12): 1238-1247.
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