EIS Study On The Anti-corrosion Performance of Polymer/Dacromet Composite Systems in 3.5% NaCl Solution

J Chin Soc Corr Pro

2006, Vol. 26

Issue (2): 89-93 DOI:

Research Report

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EIS Study On The Anti-corrosion Performance of Polymer/Dacromet Composite Systems in 3.5% NaCl Solution

;;Chuanwei Yan

中国科学院金属研究所金属腐蚀与防护国家重点实验室

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Abstract The protection performance of four polymer/Dacromet composite systems, namely three solvent-borne polymers, polyurethane, alkyd primers and fluorinated polymer as well as a water-borne coating, styrene-acrylate latex, was studied with or without pretreatment by gamma-aminopropyltriethoxysilane (γ-APS) by electrochemical impedance spectra (EIS) in 3.5%NaCl solution. The results showed that the sequence of protective performance was: fluorinated polymer>styrene-acrylate latex>polyurethane>alkyd/Dacromet composite system due to the different hydrophobic Pretreaties of organic polymers and eistence of the dispersed microorganic particles in styrene-acrylate latex. Pretreatment with γ- APS on Dacromet illustrated a markedly enhanced anti-corrosion performance of the polyurethane and alkyd/Dacromet systems because of the presence of the silane film restrained the diffusion of corrosive particles. But it also suppressed the synergetic protective effect in styrene- acrylate latex system,which led to decrease anti- corrosion performance. Pretreatment presented no obvious influence on fluorinated polymer/ Dacromet system due to the good hydrophobic property of the polymer.

Key words: Dacromet composite coating EIS anti-corrosion performance γ-APS pretreatment

Received: 29 December 2004

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Chuanwei Yan. EIS Study On The Anti-corrosion Performance of Polymer/Dacromet Composite Systems in 3.5% NaCl Solution. J Chin Soc Corr Pro, 2006, 26(2): 89-93 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2006/V26/I2/89

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