羟丙基壳聚糖在海水中对碳钢的缓蚀作用  

Corrosion Inhibition Performance of Hydroxypropyl Chitosan for Mild Steel in Seawater

作　　者：李言涛[1] 张洁[2] 姜信德[3] 孙海明[4] 侯保荣[1] 

机构地区：[1]中国科学院海洋研究所,山东青岛266071 [2]济南大学化学化工学院,山东济南250022 [3]青岛科技大学,山东青岛266042 [4]胜利油田胜利勘察设计研究院有限公司,山东东营257026

出　　处：《全面腐蚀控制》2010年第8期27-30,45,共5页Total Corrosion Control

摘　　要：在碱化条件下制备出羟丙基壳聚糖；采用静态失重实验、电化学测试和量子化学计算相结合方法研究了羟丙基壳聚糖对Q235低碳钢在海水中的腐蚀抑制作用，并探讨了缓蚀机理。结果表明，羟丙基壳聚糖在碳钢表面上发生螯合吸附作用形成保护膜，具有较好的缓蚀作用，在50mg／L时缓蚀率达到最高，极化曲线表明羟丙基壳聚糖是以抑制阴极为主的缓蚀剂。The hydroxypropyl chitosan （HCH） was synthesized in alkali condition, and the corrosion inhibition performance and inhibitive mechanism for Q235 mild steel were studied by loss-weight method, electrochemical measurement and quantum chemical calculation. The results indicated that： the HCH had good inhibition effect by adsorption on the surface of mild steel, the inhibition efficiency riched highest when the concentration of HCH was 50mg/L. Polarization curves indicated that HCH is a cathodic corrosion inhibitor.

关 键 词：羟丙基壳聚糖 缓蚀剂 量子化学 螯合 

分 类 号：TG174.42[金属学及工艺—金属表面处理]