磷酸锌对环氧涂层划痕的保护尺寸研究

中国腐蚀与防护学报

2011, Vol. 31

Issue (5): 389-394

研究报告

本期目录 | 过刊浏览

磷酸锌对环氧涂层划痕的保护尺寸研究

石秋梅,邵亚薇,张涛,孟国哲,陈琪昊

哈尔滨工程大学材料科学与化学工程学院哈尔滨 150001

PROTECTION DIMENSION OF SCRATCHED ZINC PHOSPHATE/EPOXY COATING

SHI Qiumei, SHAO Yawei, ZHANG Tao, MENG Guozhe, CHEN Qihao

Materials Science & Chemistry Engineering College, Harbin Engineering University, Harbin 150001

全文: PDF(1229 KB)

摘要: 用电化学阻抗谱（EIS）、电化学噪声（EN）及扫描电子显微镜（SEM）研究磷酸锌对磷酸锌/环氧涂层的保护作用及其保护尺寸的变化规律。研究表明，磷酸锌使划痕处的腐蚀产物变得致密，并对划痕有保护作用，随着划痕尺寸的增大其保护作用逐渐减弱。利用电化学噪声的散粒噪声理论并结合Gumbel随机分析方法研究磷酸锌的作用机制，发现磷酸锌填料的加入降低磷酸锌/环氧涂层的腐蚀生长概率，最终降低金属的腐蚀速度。

关键词 ：环氧涂层, 磷酸锌, 保护尺寸, 电化学阻抗谱, 电化学噪声

Abstract：The protection dimension of scratched zinc phosphate/epoxy coating was studied by means of electrochemical impedance spectroscopy (EIS), electrochemical noise measurements (EN) and scanning electron microscopy (SEM). The experimental results of EN, EIS and SEM revealed that zinc phosphate could inhibit the corrosion of the scratched epoxy coatings; the protection effect was gradually weakened with increasing scratch dimension from 0.4 mm, 1.0 mm to 2.0 mm. The mechanism of the inhibition of zinc phosphate pigment was analyzed based upon the shot noise theory combined with Gumbel distribution function. It showed that the corrosion growth probability of the metal under the coating decreased with the addition of zinc phosphate.

Key words： epoxy coating zinc phosphate protection dimension electrochemical impedance spectroscopy electrochemical noise

收稿日期: 2010-03-24

ZTFLH:

TG174.36

通讯作者: 石秋梅 E-mail: shaoyawei@hrbeu.edu.cn

Corresponding author: SHI Qiumei E-mail: shaoyawei@hrbeu.edu.cn

作者简介: 石秋梅，女，1985年生，硕士生，研究方向为材料腐蚀与防护

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引用本文:

石秋梅,邵亚薇,张涛,孟国哲,陈琪昊. 磷酸锌对环氧涂层划痕的保护尺寸研究[J]. 中国腐蚀与防护学报, 2011, 31(5): 389-394.
DAN Qiu-Mei, SHAO Ya-Wei. PROTECTION DIMENSION OF SCRATCHED ZINC PHOSPHATE/EPOXY COATING. J Chin Soc Corr Pro, 2011, 31(5): 389-394.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2011/V31/I5/389

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