Comparing three strategies for surface treatment of Mg coated by hexamethylene diamine tetra methylene phosphonic acid for corrosion protection

IF 1.6 4区 化学 Q4 CHEMISTRY, PHYSICAL
Hanaa Soliman, Fatma Abdel Mouez, Hoda Hussien, Abdel Salam Makhlouf, Guojiang Wan
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Abstract

Manufacturing Mg and Mg‐based alloys with controllable degradation rate has always been a challenge. Surface modification is one of the best ways to acquire protection against corrosion. Previously, many approaches such as phosphating (Na 3 PO 4 ), fluoridation (HF), and alkalization (NaOH) treatments have been used to regulate the corrosion rate. Here, we compare the corrosion rates of 3‐surface modified Mg samples coated with hexamethylene diamine tetra methylene phosphonic (HMDTMPA). The protection of those different layers was ranked in the order: phosphate > alkaline > fluoridation treatment. The chemistry of those chemical conversion layers was discussed in the light of scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), and X‐ray photoelectron spectroscopy (XPS). The mechanism of tailoring a protective film of HMDTMPA on phosphated Mg was discussed according to the ability of P to bridge the substrate with the coating.
比较了六亚乙二胺四亚甲基膦酸包覆镁合金的三种防腐处理策略
制造降解率可控的镁和镁基合金一直是一个挑战。表面改性是获得抗腐蚀保护的最好方法之一。以前,许多方法,如磷化(na3po4)、氟化(HF)和碱化(NaOH)处理已被用来调节腐蚀速率。在这里,我们比较了三表面改性Mg样品涂覆六亚乙二胺四亚甲基膦(HMDTMPA)的腐蚀速率。这些不同层的保护顺序是:磷酸盐>碱性比;氟化反应治疗。利用扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)分析了这些化学转化层的化学性质。根据磷与涂层的桥接能力,探讨了在磷酸镁表面制备HMDTMPA保护膜的机理。
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来源期刊
Surface and Interface Analysis
Surface and Interface Analysis 化学-物理化学
CiteScore
3.30
自引率
5.90%
发文量
130
审稿时长
4.4 months
期刊介绍: Surface and Interface Analysis is devoted to the publication of papers dealing with the development and application of techniques for the characterization of surfaces, interfaces and thin films. Papers dealing with standardization and quantification are particularly welcome, and also those which deal with the application of these techniques to industrial problems. Papers dealing with the purely theoretical aspects of the technique will also be considered. Review articles will be published; prior consultation with one of the Editors is advised in these cases. Papers must clearly be of scientific value in the field and will be submitted to two independent referees. Contributions must be in English and must not have been published elsewhere, and authors must agree not to communicate the same material for publication to any other journal. Authors are invited to submit their papers for publication to John Watts (UK only), Jose Sanz (Rest of Europe), John T. Grant (all non-European countries, except Japan) or R. Shimizu (Japan only).
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