Incoloy825合金在不同温度3.5%NaCl溶液中的腐蚀行为  

Corrosion Behavior of Incoloy825 Alloy in 3.5%NaCl Solution at Different Temperatures

作　　者：朱敏[1] 袁永锋[1] 刘俊[2] 聂轮 周健[1] ZHU Min YUAN Yongfeng LIU Jun NIE Lun ZHOU Jian(School of Mechanical Engineering ＆ Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China Ninth Oil Production Plant, Daqing Oil Field Co., Ltd, Daqing 163853, China Zhejiang Meili High Technology Co., Ltd, Xinchang 312500, China)

机构地区：[1]浙江理工大学机械与自动控制学院,杭州310018 [2]大庆油田有限责任公司第九采油厂,大庆163853 [3]浙江美力科技股份有限公司,新昌312500

出　　处：《中国腐蚀与防护学报》2016年第6期631-636,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金项目(51501164);浙江理工大学科研启动基金项目(15022014-Y)资助

摘　　要：采用极化曲线、电化学阻抗技术和浸泡实验对Incoloy825合金在不同温度(30~60℃)3.5%NaCl溶液中的腐蚀行为进行了研究。结果表明:随温度的升高,Incoloy825合金的腐蚀程度有所加剧,点蚀坑的大小和密集度增加,腐蚀形态由全面腐蚀为主转变为以点蚀为主的局部腐蚀。Incoloy825合金的腐蚀速率随温度的升高而增大,这是温度对电极过程两个相反作用(含氧量降低的阻滞作用和离子活性增强的促进作用)的综合影响结果。温度的升高引起Cl^-活性的增强对腐蚀的促进占主导作用。The corrosion behavior of Incoloy825 alloy in 3.5%NaC1 solution was studied in a tem- perature range 30-60 ~C by polarization curve measurement, electrochemical impedance spectros- copy （EIS） and immersion test. The results show that the corrosion degree of Incoloy825 alloy in- creases with the increase of solution temperature, meanwhile, the size and density of corrosion pits increase. Moreover, the corrosion form is changed from general corrosion to localized pitting corro- sion. The corrosion rate of the alloy increases with the increased temperature, which may be due to the synthetically effect of the two opposite factors i.e. the block effect with reducing oxygen and the stimulation effect with enhancing ion activity on the electrode process. Whilst the activity of chloride ion may play an important role in the acceleration of the corrosion process.

关 键 词：Incoloy825合金 温度 NACL溶液 腐蚀行为 

分 类 号：TG172.5[金属学及工艺—金属表面处理]