羧甲基壳聚糖对海水中X70管线钢的缓蚀效果
Carboxymethyl Chitosan as an Inhibitor for X70 Pipeline Steel in Seawater
摘 要
采用电化学试验、扫描电子显微镜、XRD和FTIR等技术研究了羧甲基壳聚糖及其复配缓蚀剂对海水中碳钢的缓蚀效果。结果表明:羧甲基壳聚糖的缓蚀率随着其质量浓度的升高而升高，当质量浓度为5 g/L时缓蚀率达到43.4%，质量浓度继续升高，缓蚀率增大不显著；添加钨酸钠后的复配缓蚀剂使腐蚀速率进一步降低，缓蚀率达57.4%；FTIR、SEM和XRD测试表明羧甲基壳聚糖可吸附在金属表面，形成致密的保护膜。
钨酸钠
海水
碳钢
carboxymethyl chitosan
Na2WO4
seawater
carbon steel
Abstract
The inhibition efficiency of carboxymethyl chitosan (CMCS) and its composite inhibitor for carbon steel X70 was studied using electrochemical testing, scanning electron microscopy (SEM), XRD and FTIR. The results show that the inhibition rate increased with increasing the concentration of CMCS and reached 43.4% at the concentration of 0.5 g/L. With further increase of the concentration, the inhibition rate didn′t change remarkably. The addition of Na2WO4 in CMCS inhibitor acted well in reducing corrosion rate, and the inhibition rate reached 57.4%. FTIR, SEM and XRD analyses showed that CMCS adsorbed on the metal surface and formed a protective dense film.
中图分类号 TG174.42 DOI 10.11973/fsyfh-201602004
所属栏目 试验研究
基金项目 国家自然科学基金(41276074); 青岛市科技发展计划项目(13-1-4-122-jch)
收稿日期 2015/1/23
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网络出版日期
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联系人作者李言涛(ytli98@163.com)
备注李言涛(1968-),研究员,博士,从事海洋腐蚀与防护,
引用该论文: CAI Guo-wei,YANG Li-hui,LI Yan-tao,FENG Pan-pan. Carboxymethyl Chitosan as an Inhibitor for X70 Pipeline Steel in Seawater[J]. Corrosion & Protection, 2016, 37(2): 108
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参考文献
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【2】马宁，汪琴，孙胜玲，等. 甲壳素和壳聚糖化学改性研究进展[J]. 化学进展，2004(4):643-653.
【3】HACKERMAN N. The theory and practice of corrosion and its control in industry[J]. Langmuir，1987，3(6):922-924.
【4】NATHAN C C. Organic inhibitors[M]. Houston，TX:NACE,1977:11-20.
【5】张大全,高立新,周国定. 国内外缓蚀剂研究开发与展望[J]. 腐蚀与防护,2009,30(9):604-610.
【6】蔡国伟,杨黎晖,李言涛,等. 海水环境中碳钢缓蚀剂的研究进展[J]. 腐蚀与防护,2015,36(2):101-107.
【7】杨春艳,周永璋,刘敏,等. 缓蚀阻垢剂WJF-6海水循环冷却水中的应用和研究[J]. 腐蚀与防护,2011,32(7):532-534.
【8】RAVI KUMAR M N V. A review of chitin and chitosan applications[J]. Reactive and Functional Polymers，2000，46(1):1-27.
【9】黄桂桥. 碳钢在我国不同海域的海水腐蚀行为[J]. 腐蚀科学与防护技术，2001(2):81-84,88.
【10】孙兰萍，赵大庆，张斌，等. 羧甲基壳聚糖铁(Ⅲ)配合物的合成及结构表征[J]. 食品工业科技，2007(11):81-83,86.
【11】ALENTEJANO C R,AOKI I V. Localized corrosion inhibition of 304 stainless steel in pure water by oxyanions tungstate and molybdate[J]. Electrochimica Acta,2004,49(17):2779-2785.
【12】SILVA J W J,CODARO E N,NAKAZATO R Z,et al. Influence of chromate,molybdate and tungstate on pit formation in chloride medium[J]. Applied Surface Science,2005,252(4):1117-1122.
【13】MU G,LI X,QU Q,et al. Molybdate and tungstate as corrosion inhibitors for cold rolling steel in hydrochloric acid solution[J]. Corrosion Science,2006,48(2):445-459.
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