Li Xiaokun *,Lei Mingke,Lu Changyuan.Effect of ammonium adipate on properties of hard oxide films prepared on aluminum alloy[J].Plating & Finishing,2024,(4):1-9.[doi:10.3969/j.issn.1001-3849.2024.04.001]
己二酸铵对铝合金硬质氧化膜性能的影响
- Title:
- Effect of ammonium adipate on properties of hard oxide films prepared on aluminum alloy
- Keywords:
- hard oxide film ; aluminum alloy ; ammonium adipate ; hardness ; wear resistance ; corrosion resistance
- 分类号:
- TQ153
- 文献标志码:
- A
- 摘要:
- 选用 2024 铝合金作为基体，分别在不添加和添加己二酸铵的硫酸电解液中制备硬质氧化膜，并研究己二酸铵浓度对硬质氧化膜的微观形貌、化学成分、厚度、硬度、耐磨性能以及耐腐蚀性能的影响。结果表明：添加适量己二酸铵促进形成较致密的硬质氧化膜，并使硬质氧化膜增厚，硬度增大且耐磨性能和耐腐蚀性能明显提高。添加 20 g/L 己二酸铵制备的硬质氧化膜表面均匀性和致密性最好，厚度和硬度分别达到 21.2 μ m 、 380.8 HV ，摩擦系数和磨损失重仅为 0.52 和 0.87 mg ，并且腐蚀电流密度与铝合金基体相比降低了超过一个数量级，表现出更好的综合性能。但是添加己二酸铵并未改变硬质氧化膜的元素组成，所以硬质氧化膜的综合性能提高主要归因于添加适量己二酸铵参与了硬质氧化膜形成过程，并影响了铝离子传导过程，从而促使硬质氧化膜增厚且致密性改善。
- Abstract:
- ： Hard oxide films were prepared on 2024 aluminum alloy matrix from the sulfuric acid electrolyte with and without ammonium adipate ， and the effect of ammonium adipate concentration on the microstructure ， chemical composition ， thickness ， hardness ， wear resistance and corrosion resistance of the hard oxide film was studied. The results show that adding appropriate amount of ammonium adipate promote the formation of dense and thicker hard oxide film ， the hardness increased ， and the wear resistance and corrosion resistance improved significantly. The hard oxide film prepared by adding 20 g/L ammonium adipate has the best surface uniformity and densification ， the thickness and hardness reach 21.2 μ m and 380.8 HV ， respectively. The friction coefficient and wear loss are only 0.52 mg and 0.87 mg ， and the corrosion current density is decreased by more than one order of magnitude compared with aluminum alloy matrix ， indicating that the hard oxide film prepared by adding 20 g/L ammonium adipate possesses better comprehensive performance. However ， adding ammonium adipate does not change the elemental composition of the hard oxide film. The improvement of overall performance of the hard oxide film is mainly due to adding appropriate amount of ammonium adipate participates in the formation of hard oxide film and affects the aluminum ion conduction process ， and then promotes the hard oxide film thickening and gradually improve the densification.
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备注/Memo
收稿日期： 2023-08-22 修回日期： 2023-10-14 * 通信作者： 李孝坤（ 1982 —），硕士，副教授，主要研究材料制备及化学分析检测， email ： li_kaifeng004@163.com 基金项目： 河南省重大科技专项（ 221100320200 ）、河南省高等学校重点科研项目计划（ 21A170015 ）、开封市科技攻关计划项目（ 1901021 ）