钼酸盐复配体系对碳钢缓蚀作用研究  

Study on the Corrosion Inhibition Efficiency of Molybdate Complex System for Carbon Steel

作　　者：李红兵 李爱农[1] 林志峰[2] 许立坤[2] LI Hongbing;LI Ainong;LIN Zhifeng;XU Likun(School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Materials Research Institute, Qingdao 266237, China)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护重点实验室,山东青岛266237

出　　处：《电镀与精饰》2018年第5期41-46,共6页Plating & Finishing

摘　　要：本文采用腐蚀失重、电化学阻抗谱、极化曲线和扫描电镜(SEM)等方法研究了钼酸钠及其与磷酸氢二钠的复配体系在3.5%NaCl介质中对碳钢的缓蚀性能。结果表明,与钼酸钠单独使用时相比,与磷酸氢二钠的复配使用能够提高其缓蚀效率。当钼酸钠与磷酸氢二钠两种缓蚀剂的复配比为3∶7时,对Q235的缓蚀效果最佳,缓蚀效率达到90%,能更有效地抑制碳钢的腐蚀。In this paper,the corrosion inhibition performances of sodium molybdate and its complex sys-tem mixed with disodium hydrogen phosphate for carbon steel Q235 in 3.5%Na Cl solution were studiedby using corrosion weight loss method,electrochemical impedance spectroscopy,potentiodynamic polar-ization measurement and SEM observation. The results showed that the corrosion inhibition efficiency ofsodium molybdate was improved significantly when mixed with disodium hydrogen phosphate. When themixture ratio of sodium molybdate and disodium hydrogen phosphate was 3∶7 in concentration,the cor-rosion inhibition efficiency for Q235 was the best,and the inhibition efficiency reached 90%,whichcould efficiently inhibit the corrosion of carbon steel.

关 键 词：钼酸钠 磷酸氢二钠 复配体系 缓蚀作用 

分 类 号：TG174.42[金属学及工艺—金属表面处理]