海水中水溶性壳聚糖及其降解产物对低碳钢缓蚀性能的影响

中国腐蚀与防护学报

2008, Vol. 28

Issue (6期): 325-330

研究报告

本期目录 | 过刊浏览

海水中水溶性壳聚糖及其降解产物对低碳钢缓蚀性能的影响

杨小刚^1;2;邵丽艳¹;张树芳^1;2;焦巍³;李言涛¹;侯保荣¹

1.中国科学院海洋研究所青岛 266071
2.中国科学院研究生院北京 100049
3.青岛大学师范学院青岛 266071

CORROSION INHIBITION PROPERTIES OF WATER SOLUBLE CHITOSAN AND ITS DEGRADATION PRODUCTS FOR MILD STEEL IN SEAWATER

YANG Xiaogang^1;2;SHAO Liyan¹;ZHANG Shufang^1;2;JIAO Wei³;LI Yantao¹;HOU Baorong¹

1.Institute of Oceanology; Chinese Academy of Sciences; Qingdao 266071
2.Graduate School of the Chinese Academy of Sciences; Beijing 100049
3.College of Teachers; Qingdao University; Qingdao 266071

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摘要:

利用过氧化氢氧化降解水溶性壳聚糖得到不同分子量梯度的产物，通过端基法测定了产物的数均分子量。在海水体系中，用失重法测定了不同浓度水溶性壳聚糖及其降解产物对低碳钢的缓蚀效率，并用电化学方法和椭圆偏振法分析其缓蚀机理。结果表明：过氧化氢用量的增加有利于降解产物分子量的降低；不同分子量水溶性壳聚糖降解产物浓度为400 mg/L时缓蚀效率最高，且分子量减小有利于缓蚀效率的提高，可达到64.35%；极化曲线实验所得规律与失重实验相符，表明水溶性壳聚糖及其降解产物为阴极型缓蚀剂；椭圆偏振法分析表明，水溶性壳聚糖为多层吸附，且随着分子量的减小，吸附层厚度增厚，缓蚀效率提高。

关键词 ：水溶性壳聚糖, 降解, 缓蚀性能, 极化曲线, 椭圆偏振

Abstract：

Water soluble chitosan was degraded to different molecular mass products by hydrogen peroxide at first, and then molecular mass of the degradation products were measured using terminal group analysis method. The inhibitive properties of water soluble chitosan and its degradation products for mild steel were studied by mass loss method and potentiodynamic polarization measurement. The inhibitive mechanisms were analyzed by polarization curves and ellipsometry method. The results show that with the increasing of hydrogen peroxide quantity the degradation products molecular mass were decreased. It was found that the highest inhibition effect of water soluble chitosan and its degradation products was obtained at 400 mg/L and the lower the molecular weight, the higher the inhibition efficiency, which was up to 64.35%. The results of polarization curve method show that the water soluble chitosan and its degradation products have similar inhibition tendency measured by mass loss method and are cathodic corrosion inhibitors. Ellipsometry experimental results indicated chitosan took place multi-layer absorption on carbon steel surface and inhibition film became thicker with molecular mass decreasing. The water soluble chitosan with low molecular mass are green corrosion inhibitor for mild steel in seawater.

Key words： water soluble chitosan degradation inhibitory property polarization curve ellipsometry

收稿日期: 2007-02-12

ZTFLH:

TG174.42

基金资助:

中国科学院知识创新工程(KZCX-YW-210)和青岛市科技发展计划项目资助

通讯作者: 杨小刚 brhou@ms.qdio.ac.cn

Corresponding author: yangxiaogang brhou@ms.qdio.ac.cn

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引用本文:

杨小刚邵丽艳张树芳焦巍李言涛侯保荣. 海水中水溶性壳聚糖及其降解产物对低碳钢缓蚀性能的影响[J]. 中国腐蚀与防护学报, 2008, 28(6期): 325-330.
YANG Xiao-Gang. CORROSION INHIBITION PROPERTIES OF WATER SOLUBLE CHITOSAN AND ITS DEGRADATION PRODUCTS FOR MILD STEEL IN SEAWATER. J Chin Soc Corr Pro, 2008, 28(6期): 325-330.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2008/V28/I6期/325

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