封孔处理等离子喷涂Cr<sub>2</sub>O<sub>3</sub>涂层耐蚀性的电化学表征

中国腐蚀与防护学报

2012, Vol. 32

Issue (6): 473-477

研究报告

本期目录 | 过刊浏览

封孔处理等离子喷涂Cr₂O₃涂层耐蚀性的电化学表征

侯岩枫^1,2,许立坤²,沈承金¹,李相波²

1. 中国矿业大学材料科学与工程学院徐州 221116 2. 中船重工七二五所海洋腐蚀与防护国防科技重点实验室青岛 266101

ELECTROCHEMICAL CHARACTERIZATION FOR CORROSION RESISTANCE OF PLASMA-SPRAYED Cr₂O₃ COATING WITH SEALING

HOU Yanfeng^1,2, XU Likun², SHEN Chengjin¹, LI Xiangbo²

1. School of Materials Science and Engineering, China University of Mining & Technology, Xuzhou 221116

2. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Materials Research Institute, Qingdao 266101

全文: PDF(1000 KB)

摘要:

用等离子喷涂工艺在Q235钢基体上制备Cr₂O₃陶瓷涂层，并采用磷酸铝和环氧树脂对其进行封孔处理。利用图像分析法和电化学方法对封孔前后涂层的孔隙率进行了测试，采用弱极化技术和电化学阻抗谱技术对封孔前后涂层的耐蚀性能进行了研究。结果表明，封孔处理提高了涂层的耐蚀性能，环氧树脂封孔涂层的耐蚀性能更优异；陶瓷涂层在腐蚀介质中耐蚀性能主要取决于涂层的孔隙率。

关键词 ：等离子喷涂, Cr₂O₃涂层, 封孔处理, 孔隙率, 电化学

Abstract：

Cr₂O₃ coating was deposited on Q235 steel by means of plasma-sprayed technology, which was sealed by aluminum phosphate and epoxy resin respectively. The porosity of the coating was investigated by graph analysis and electrochemical measurement, and the corrosion resistance of the coating was characterized by polarization curve and electrochemical impedance spectroscopy (EIS). It is found that the sealing treatment can elevate corrosion resistance of the Cr₂O₃ coating. Compared with the coating sealed with aluminum phosphate, the epoxy resin-sealed coating shows excellent corrosion resistance. The electrochemical behavior of the Cr₂O₃ coating in the corrosive electrolyte depends mainly on the porosity of the coating.

Key words： 13cmrm plasma spraying Cr₂O₃ coating sealing treatment porosity, electrochemistry

收稿日期: 2012-01-09

ZTFLH:

TG174.442

通讯作者: 许立坤 E-mail: xulk@sunrui.net

Corresponding author: Likun Xu E-mail: xulk@sunrui.net

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侯岩枫许立坤沈承金李相波. 封孔处理等离子喷涂Cr₂O₃涂层耐蚀性的电化学表征[J]. 中国腐蚀与防护学报, 2012, 32(6): 473-477.

链接本文:

https://www.jcscp.org/CN/Y2012/V32/I6/473

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