Breakthrough in aluminum protection: Electrochemical and wear insights into sol-gel sealed PEO-coated AA2024-T3 and AA2198-T851

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2024-10-30 DOI:10.1016/j.surfcoat.2024.131510

Sajjad Akbarzadeh , Rafael Emil Klumpp , Alexandre Mégret , Vedi Ölmez , Véronique Vitry , Marie-Georges Olivier

引用次数: 0

Abstract

In consideration of the intrinsic porosity in layers generated via the plasma electrolytic oxidation (PEO) process, sol-gel coatings have gained a lot of attention for their environmentally friendly and robust protective qualities when applied as a post-treatment. The sealing capabilities of the sol-gel layer were scrutinized for the PEO coating applied on AA2024-T3 and AA2198-T851 aluminum alloys. Electrochemical Impedance Spectroscopy (EIS) and Field Emission Scanning Electron Microscopy (FE-SEM) confirmed that for the same operating conditions, the morphological properties of the PEO coating depend on the substrate nature and play a key role in the corrosion protection given by such duplex coatings. Furthermore, the findings indicated that the use of a sol-gel enhances the wear resistance compared to the blank substrates and the PEO coatings.

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铝保护方面的突破：对溶胶-凝胶密封 PEO 涂层 AA2024-T3 和 AA2198-T851 的电化学和磨损研究

考虑到通过等离子电解氧化（PEO）工艺生成的涂层存在固有孔隙率，溶胶-凝胶涂层作为一种后处理方法，以其环保和坚固的保护特性而备受关注。我们对应用于 AA2024-T3 和 AA2198-T851 铝合金的 PEO 涂层的溶胶-凝胶层的密封能力进行了仔细研究。电化学阻抗光谱（EIS）和场发射扫描电子显微镜（FE-SEM）证实，在相同的操作条件下，PEO 涂层的形态特性取决于基材的性质，并在此类双相涂层的腐蚀保护中发挥着关键作用。此外，研究结果表明，与空白基底和 PEO 涂层相比，溶胶-凝胶的使用提高了耐磨性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.