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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) |
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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.
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Received: 25 June 1998
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Cite this article:
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). CORROSION PREVENTION OF REINFORCING STEEL BY ACRYLIC LATEX. J Chin Soc Corr Pro, 1998, 18(3): 198-202.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1998/V18/I3/198
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