水溶性壳聚糖对双相不锈钢的缓蚀作用  

Inhibition Effect of Water-soluble Chitosan on 2205 Duplex Stainless Steel

作　　者：骆鸿[1] 王宇宁[2] 董超芳[2] 肖葵[2] 李晓刚[2] 

机构地区：[1]河海大学力学与材料学院,南京210098 [2]北京科技大学新材料技术研究院,北京100083

出　　处：《腐蚀与防护》2017年第1期25-29,68,共6页Corrosion & Protection

基　　金：国家自然科学基金项目(51401076);江苏省自然基金项目(BK20140849)

摘　　要：采用化学浸泡、电化学测试、扫描电镜观察等方法,研究了水溶性壳聚糖对2205双相不锈钢在3.5%(质量分数,下同)NaCl溶液中腐蚀行为的影响,同时进一步分析和讨论了水溶性壳聚糖在NaCl溶液中的缓蚀作用和缓蚀机理。结果表明:水溶性壳聚糖是一种抑制阳极过程为主的缓蚀剂,溶液中含有水溶性壳聚糖,能有效减轻2205双相不锈钢的局部腐蚀。Chemical immersion, conventional electrochemical test and scanning electron microscopy （SEM） methods were used to study the effect of water-soluble chitosan on the electrochemical corrosion behaviour of 2205 duplex stainless steel in 3.5 % NaCl solution. Moreover, the inhibition behaviour and mechanism of water-soluble chitosan in NaCl solution was also discussed. The results show that the water soluble chitosan is a kind of anodic process inhibitor, the solution containing water soluble chitosan can effectively reduce the localized corrosion of 2205 duplex stainless steel.

关 键 词：双相不锈钢 点蚀 环保型缓蚀剂 

分 类 号：TG174.4[金属学及工艺—金属表面处理]