摘要
使用电化学工作站检测热轧态347H不锈钢、固溶态酸洗347H不锈钢和固溶处理态347H不锈钢在3.5wt.%NaCl、5wt.%H_(2)SO_(4)和5wt.%NaOH腐蚀介质中的电化学腐蚀行为,绘制极化曲线和电化学阻抗谱研究固溶处理对347H不锈钢电化学腐蚀行为的影响.结果表明:在3.5wt.%NaCl腐蚀介质中,固溶态酸洗347H不锈钢表现出最佳的耐腐蚀性,而固溶处理会降低热轧态347H不锈钢的耐腐蚀性能.在5wt.%H_(2)SO_(4)腐蚀介质中,通过1160℃固溶处理2 h,347H不锈钢的耐腐蚀性有所提高.在5wt.%NaOH腐蚀介质中,热轧态347H不锈钢的自腐蚀电流密度和其他状态的347H不锈钢相比要小一个数量级,因此,热轧态347H不锈钢更耐5wt.%NaOH腐蚀介质的腐蚀.
Electrochemical workstations were used to detect the electrochemical corrosivity of hot-rolled 347H stainless steel,solution pickled 347H stainless steel and solution treated 347H stainless steel in corrosive media 3.5wt.%NaCl,5%wt.%H_(2)SO_(4) and 5wt.%NaOH.The effect of solution treatment on the electrochemical corrosion behavior of 347H stainless steel was studied by drawing polarization curves and electrochemical impedance spectroscopy.The results showed that in the 3.5wt.%NaCl corrosion medium,solid solution pickling 347H stainless steel shows the best corrosion resistance,while solid solution treatment reduces the corrosion resistance of 347H stainless steel.In 5wt.%H_(2)SO_(4) corrosion medium,corrosion resistance through 1160℃solid solution treatment with 2 h,347H stainless steel has been improved.The self-corrosion current density of hot-rolled 347H stainless steel in 5wt.%NaOH corrosion medium is an order of magnitude smaller than that of other 347H stainless steel.Therefore,hot-rolled 347H stainless steel is more resistant to corrosion of 5wt.%NaOH corrosion medium.
作者
赵吉鹏
王军
刘天增
李俊琛
冯力
ZHAO Ji-peng;WANG Jun;LIU Tian-zeng;LI Jun-chen;FENG Li(Gansu Province Special Equipment Inspection and Testing Institute, Lanzhou 730050, China;College of Materials Science and Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China;Jiuquan Steel Group Stainless Steel Institute, Jiayuguan 735100, China)
出处
《兰州理工大学学报》
CAS
北大核心
2021年第6期6-14,共9页
Journal of Lanzhou University of Technology
基金
甘肃省青年博士基金(2021QB-043)。
关键词
347H不锈钢
极化曲线
电化学阻抗谱
腐蚀性能
347H stainless steel
polarization curve
electrochemical impedance spectroscopy
corrosion performance
