S32750超级双相不锈钢在含有Cl^(-)的柠檬酸溶液中的电化学行为  

Electrochemical Behavior of S32750 super duplex Stainless steel in Citric Acid Solution Containing Cl^(-)

作　　者：梁平[1] 赵宏伟 杨美桐 LIANG Ping;ZHAO Hong-wei;YANG Mei-tong(School of Mechanical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学机械工程学院,辽宁抚顺113001

出　　处：《当代化工》2023年第8期1835-1838,1843,共5页Contemporary Chemical Industry

基　　金：辽宁省科技厅自然科学基金指导计划项目(项目编号:20180550348);2020年辽宁省大学生创新创业训练计划项目,柠檬酸清除换热器管束表面垢层的可行性研究(项目编号:202010148974)。

摘　　要：通过开路电位、动电位极化、电化学阻抗等电化学方法,考察了S32750超级双相不锈钢(SDSS)在2%~10%柠檬酸溶液中的腐蚀行为,以及氯离子对超级双相不锈钢腐蚀行为的影响。结果表明:随着柠檬酸质量分数逐渐增大,S32750SDSS的抗腐蚀性能逐渐增强。但溶液中一旦存在氯离子,S32750SDSS在柠檬酸溶液中则表现出更大的自腐蚀电流密度,更低的击穿电位,抗腐蚀性能明显减弱。The corrosion behavior of S32750 super duplex stainless steel(SDSS)in 2%~10% citric acid solution and the effect of chloride ion on the corrosion behavior of super duplex stainless steel were investigated by electrochemical methods,such as open circuit potential,potentiodynamic polarization and electrochemical impedance.The results showed that the corrosion resistance of S32750 SDSS increased with the increase of citric acid mass fraction.However,once there was chloride ion in the solution,S32750 SDSS displayed greater self-corrosion current density,lower breakdown potential,and the corrosion resistance in citric acid solution was significantly weakened.

关 键 词：S32750超级双相不锈钢 柠檬酸 氯离子 腐蚀 

分 类 号：TQ050.91[化学工程]