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
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。
点蚀
环保型缓蚀剂
duplex stainless steel
pitting
environment friendly inhibitor
Abstract
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.
中图分类号 TG174.4 DOI 10.11973/fsyfh-201701006
所属栏目 试验研究
基金项目 国家自然科学基金项目（51401076）；江苏省自然基金项目（BK20140849）
收稿日期 2015/8/29
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引用该论文: LUO Hong,WANG Yu-ning,DONG Chao-fang,XIAO Kui,LI Xiao-gang. Inhibition Effect of Water-soluble Chitosan on 2205 Duplex Stainless Steel[J]. Corrosion & Protection, 2017, 38(1): 25
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【4】PANDIAN B R,MATHUR G S. Natural products as corrosion inhibitor for metals in corrosive media-A review[J]. Materials Letters,2008,62(1):113-116.
【5】MATJAŽ F,INGRID M. Inhibition of copper corrosion by 1,2,3-benzotriazole:a review[J]. Corrosion Science,2010,52(9):2737-2749.
【6】NAM N D,SOMERS A,MATHESH M,et al. The behaviour of praseodymium 4-hydroxycinnamate as an inhibitor for carbon dioxide corrosion and oxygencorrosion of steel in NaCl solutions[J]. Corrosion Science,2014(80):128-138.
【7】孙华林. 水溶性壳聚糖的开发与应用[J]. 化工中间体网刊,2003(7):24-27.
【8】SIRLEI R,MAURO C M L,HUMBERTO G R,et al. Crosslinked quaternary chitosan as an adsorbent for the removal of the reactive dye from aqueous solutions[J]. Journal of Hazardous Materials,2008,155:253-260.
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