ADHESION BEHAVIOR OF POLYUREA COATING SYSTEM ON CONCRETE SURFACE

J Chin Soc Corr Pro

2011, Vol. 31

Issue (5): 348-355 DOI:

Research Articles

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ADHESION BEHAVIOR OF POLYUREA COATING SYSTEM ON CONCRETE SURFACE

ZHONG Ping¹, LI Jian²

1. School of Chemistry & Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104
2. Wuhan Research Institute of Materials Protection, Wuhan 430030

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Abstract The composite polyurea coating system were made with the solvent-free epoxy sealing coating and the polyurea coating on the surface of the concrete sample. The adhesion strength of the polyurea coating on the surface of concrete was measured. To understand the reasons for the adhesion failure of the polyurea coating on the surface of the concrete sample, the characteristics of the interface between the polyurea coating and the concrete surface were analyzed thoroughly with the help of surface topography, infra-red spectrum, and electron spectrum. The results showed that the adhesion failure resulted from the damage of the physical adhesion between the polyurea coating and concrete; and the failure of “solvent-free epoxy sealing coating + polyurea coating” system resulted from both the damage of the physical adhesion between the coating and concrete, and the damage of cohesion of the sealing coating itself. It was suggested that this solvent-free epoxy sealing coating improved the adhesion of the coating system and enhanced the strength of the concrete surface because of the special internal structure formed between the solvent-free epoxy sealing coating and the polyurea coating.

Key words: polyurea coating system wet-adhesion morphology adhesion behavior

Received: 04 March 2011

ZTFLH:

TQ630.1

Corresponding Authors: ZHONG Ping E-mail: paint12@tom.com

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ZHONG Ping, LI Jian. ADHESION BEHAVIOR OF POLYUREA COATING SYSTEM ON CONCRETE SURFACE. J Chin Soc Corr Pro, 2011, 31(5): 348-355.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2011/V31/I5/348

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