铝合金Ce-Mn转化膜溶液中HF<sub>2</sub><sup>-</sup>离子作用机理研究

中国腐蚀与防护学报

2012, Vol. 32

Issue (1): 39-43

研究报告

本期目录 | 过刊浏览

铝合金Ce-Mn转化膜溶液中HF₂^-离子作用机理研究

李文芳，张凯，杜军

华南理工大学材料科学与工程学院，广州 510641

MECHANISM OF HF₂^- IONS IN Ce-Mn CONVERSION COATINGS ON Al ALLOY

LI Wenfang, ZHANG Kai, DU Jun

School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641

全文: PDF(1486 KB)

摘要: 利用电子探针显微分析（EPMA）、X射线衍射（XRD）、能谱仪（EDS）、X射线光电子能谱分析（XPS）对Ce-Mn转化膜膜层进行表面和截面元素分布、相组成分析及沉淀物粉末的物相分析。结果表明，HF₂^-盐作为Ce-Mn转化膜溶液的促进剂，主元素F不是Ce-Mn复合膜层的组成成分，并不参与膜层的生长过程。通过对铝合金基体的腐蚀及其表面氧化膜(Al₂O₃)的溶解，使铝合金阴极区快速暴露，形成的[AlFe₆]^3-总量小于1.8mmol/L，完全溶于溶液。

关键词 ： HF₂^-, Ce-Mn转化膜, [AlF₆]^3-, 沉淀

Abstract：Distribution of Ce-Mn conversion coating was analysed with electron probe micro analysis,energy disperse spectroscopy, X-ray photoelectron spectroscopy analysis, respectively. X-ray diffraction was used to study the features of the phase composition of the conversion coating and the sediment in the solution containing HF₂^- ions. The results show that the element F does not exist in the Ce-Mn conversion coatings, and HF₂^- does not participate in the growth process of the coating. The main purpose of HF₂^- ions was in the initial stage. Al matrix and its oxide film (Al₂O₃) in the surface of Al alloy were dissolved priority, so that cathode district which conducive to the formation of the coating exposures rapidly to the solution. Simultaneously, the total [AlF₆]^3- in the solution is less than 1.8 mmol/L, completely dissolved.

Key words： HF₂^- ions Ce-Mn conversion coating [AlF₆]^3- sediment

收稿日期: 2010-08-09

ZTFLH:

TG174.4

基金资助:

粤港关键领域重点突破项目(2008Z012)和广东省中大科技专项基金项目(2009A08025002)资助

通讯作者: 李文芳 E-mail: mewfli@scut.edu.cn

Corresponding author: LI Wenfang E-mail: mewfli@scut.edu.cn

作者简介: 李文芳，男，1964年生，教授，博士生导师，研究方向为复合材料、腐蚀与防护

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引用本文:

李文芳，张凯，杜军. 铝合金Ce-Mn转化膜溶液中HF₂^-离子作用机理研究[J]. 中国腐蚀与防护学报, 2012, 32(1): 39-43.
ZHANG Kai, LI Wen-Fang. MECHANISM OF HF₂^- IONS IN Ce-Mn CONVERSION COATINGS ON Al ALLOY. J Chin Soc Corr Pro, 2012, 32(1): 39-43.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2012/V32/I1/39

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