过期药呋塞米在醋酸溶液中对冷轧钢的缓蚀作用  

Corrosion inhibition of expired drugs furosemide for cold rolled steel in acetic acid solution

作　　者：余晋苗 白玮[1,2] 杨艳[1,2] 史英浩 王维[1,2] 喻银凤 徐艳娇[1,2] 

机构地区：[1]云南民族大学云南省聚乳酸基功能材料工程实验室,云南昆明650500 [2]云南民族大学化学与生物技术学院,民族药资源化学国家民委-教育部重点实验室,云南昆明650500

出　　处：《清洗世界》2014年第3期5-11,23,共8页Cleaning World

基　　金：国家自然科学基金资助项目(51161025);云南省自然科学基金项目(2011FZ173);云南省绿色化学与功能材料研究省创新团队(2011HC008);云南省教学改革项目(201327);云南省高校绿色新能源与材料科技创新团队(2011UY09)

摘　　要：通过电导率测量、pH测量、同步热分析(STA)、Tafel极化曲线法和电化学交流阻抗谱法研究了不同浓度和温度下过期药呋塞米在1 mol/L的醋酸溶液中对冷轧钢缓蚀作用。实验结果表明:过期药呋塞米在1 mol/L的醋酸溶液中对冷轧钢有较好的缓蚀效果,且缓蚀率随着缓蚀剂浓度和温度的增加而增大。该缓蚀剂在醋酸中对钢是一种抑制阴极和阳极的混合型缓蚀剂。缓蚀剂在冷轧钢表面的吸附符合Langmuir吸附等温式,其吸附是自发、物理吸附过程。同步热分析还说明了该缓蚀剂易稳定吸附在冷轧钢表面。The corrosion inhibition of the expired drugs furosemide for cold roiled steel in 1 mol/L acetic acid was investigated with Conductivity measurement, pH measurement, Simultaneous thermal a-nalysis （STA） , Tafel polarization curve and Electrochemical impedance spectroscopy （EIS）at differ-ent concentration and temperature. Experimental results showed that furosemide was a good inhibitor for cold rolled steel in 1 mol/L acetic acid, and inhibition efficiency increases with an increased with concentration of inhibitor and temperature. It acted as a mixed - type inhibitor mainly inhibited the anodic and cathodic process for steel in HAc solution. The adsorption of inhibitors on the CRS surface was a spontaneous and physical adsorption, also obeyed the Langmuir adsorption isotherm equa-tion. STA also showed that the stability of inhibitor adsorbed easily on the surface of CRS.

关 键 词：呋塞米 冷轧钢 电导率 极化曲线法 交流阻抗谱法 同步热分析 

分 类 号：TG174.42[金属学及工艺—金属表面处理]