丙烯酸系乳胶用于钢筋混凝土的防腐蚀研究

中国腐蚀与防护学报

1998, Vol. 18

Issue (3): 198-202

研究报告

本期目录 | 过刊浏览

丙烯酸系乳胶用于钢筋混凝土的防腐蚀研究

王胜先;林薇薇;成少安;张鉴清

浙江大学高分子科学与工程系;杭州310027;浙江大学高分子科学与工程系;杭州310027;浙江大学化学系;杭州310027;浙江大学化学系;杭州310027

CORROSION PREVENTION OF REINFORCING STEEL BY ACRYLIC LATEX

WANG Sheng-xian LIN Wei-wei (Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027)CENG Sao-an ZHANG Jian-qing (Department of Chemisty; Zhejiang University; Hangzhou 310027)

全文: PDF(355 KB)

摘要: 用电化学阻抗谱研究了丙烯酸系乳胶作为混凝土添加剂或钢筋表面涂层时对钢筋腐蚀行为的影响。加速腐蚀试验结果表明混凝土中添加乳胶后能够延缓钢筋表面钝化层的破坏,而对混凝土的渗透性能影响不大。乳胶涂层能够显著减小钢筋腐蚀速率,涂层的存在改变了钢筋表面的腐蚀状态。在此基础上提出了改善钢筋混凝土抗蚀能力的措施。

关键词 ：钢筋腐蚀, 丙烯酸系乳胶, 添加剂, 涂层, 电化学阻抗谱

Abstract：Acrylic emulsion was introduced into steel reinforcing concrete as concrete admixtures or rebar coatings in order to prevent steel reinforcements from corrosion. Specimens were immersed in 3% NaCl solution as accelerating corrosion test for up to 60 days. The corrosion behavior of each specimen at different immersion time was investigated with electrochemical impedance spectroscopy(ELS) method. The results showed that breakdown of the passive layer on the steel surface were deferred when incorporating 20% acrylic emulsion into concrete while its permeability remanining unchanged. The corrosion rate can also be reduced to a considerable extent when using steel rebar coated with acrylic emulsions. The active state of steel surface under the emulsion coatings was ascertained by comparing the impedance spectroscopy before and after cathodic activation. On the basis of these results, some proposals were presented to enhance the anticorrosion ability of the emulsion coatings. All above showed that acrylic emulsion is a promising material for corrosion prevention of reinforcing concrete.

Key words： Steel rebar corrosion Acrylic latex Coating Additive Electrochemical impedance spectroscopy

收稿日期: 1998-06-25

基金资助:金属腐蚀与防护国家重点实验室资助项目

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王胜先;林薇薇;成少安;张鉴清. 丙烯酸系乳胶用于钢筋混凝土的防腐蚀研究[J]. 中国腐蚀与防护学报, 1998, 18(3): 198-202.
. CORROSION PREVENTION OF REINFORCING STEEL BY ACRYLIC LATEX. J Chin Soc Corr Pro, 1998, 18(3): 198-202.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1998/V18/I3/198

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