Effect of adding Sr(OH)2 on the formation process of 2024 aluminum alloy micro-arc oxidation coatings

被引：0
|
作者：
Ma, Yuxia [1 ]
Wang, Ping [1 ]
Ji, Weinan [1 ]
Chen, Rong [1 ]
机构：
[1] School of New Energy and Materials, Southwest Petroleum University, Chengdu, China
来源：
Materials Letters | 2024年 / 377卷
关键词：
Phosphate coatings - Silicates - Strontium alloys - Strontium compounds;
D O I：
10.1016/j.matlet.2024.137522
中图分类号：
学科分类号：
摘要：
Micro-arc oxidation coatings with oxidation times of 15 S, 30 S, 60 S, 120 S, 240 S and 1800 S were prepared on 2024 aluminum alloy using silicate-phosphate electrolytes containing 0 g/L and 0.5 g/L Sr(OH)2, respectively. The effects of adding Sr(OH)2 on the oxidation voltage, surface morphology and phase composition of the 2024 aluminum alloy MAO coatings formation process were investigated using SEM, XRD and XPS. The results show that adding Sr(OH)2 increases and then decreases the oxidation voltage compared with that of the unadded Sr(OH)2, which has little effect on the morphology of the oxide coatings, the Sr2+ and PO43- in the solution are jointly involved in the formation of the MAO coatings. The main phase composition of the coating is γ-Al2O3, and the Sr element is uniformly distributed as SrCO3 in the coating. © 2024 Elsevier B.V.
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