ZHAO Guanglian*,WEN Pushan.Anodic Oxidation of ZL101A Aluminium Alloy for Electrical Connector with Mixed Acid and Corrosion Resistance of Oxidation Film[J].Plating & Finishing,2021,(10):31-35.[doi:10.3969/j.issn.1001-3849.2021.10.006]
电连接器用ZL101A铝合金混合酸阳极氧化及氧化膜的耐蚀性
- Title:
- Anodic Oxidation of ZL101A Aluminium Alloy for Electrical Connector with Mixed Acid and Corrosion Resistance of Oxidation Film
- 文献标志码:
- A
- 摘要:
- 以电连接器用ZL101A铝合金为基体进行酒石酸-硫酸阳极氧化，同时进行硫酸阳极氧化作为对照。表征了硫酸氧化膜和酒石酸-硫酸氧化膜的表面形貌，并测试了两种氧化膜的表面粗糙度、化学成分及耐蚀性。结果表明：两种氧化膜的厚度均匀性和平整度都较好，与硫酸氧化膜相比，酒石酸-硫酸氧化膜表面的孔洞数量较少。两种氧化膜都含有Al、O、S和C元素，同一元素的质量分数相差不大。两种氧化膜在NaCl溶液中的耐蚀性都强于铝合金基体，与硫酸氧化膜相比，酒石酸-硫酸氧化膜的腐蚀电位正移了约60 mV，腐蚀电流密度降低了约27 %，电荷转移电阻和膜层电阻都增大，对铝合金基体的保护效率接近89 %，表现出更好的耐蚀性。
- Abstract:
- Anodic oxidation with tartaric acid and sulfuric acid was carried out using the ZL101A aluminium alloy for electrical connector as the substrate, and anodic oxidation with sulfuric acid was also carried out as a comparison. The surface morphology of sulphuric acid oxide film and tartaric acid-sulphuric acid oxide film were characterized, and the surface roughness, chemical composition and corrosion resistance of these two oxidation films were measured. The results showed that the thickness uniformity and flatness of these two oxidation films were excellent. Compared with sulphuric acid oxidation film, there was fewer holes on the surface of tartaric acid-sulphuric acid oxidation film. Both of these two oxidation films contained Al, O, S and C, and the mass fraction of the same element differed little. The corrosion resistance of these two oxidation films in NaCl solution was better than that of aluminum alloy substrate. Compared with sulphuric acid oxidation film, the corrosion potential of tartaric acid-sulphuric acid oxidation film was positively shifted by 60 mV, the corrosion current density was decreased by 27 %, both of the charge transfer resistance and film resistance were increased, and the protection efficiency was close to 89 %, indicating that tartaric acid-sulfuric acid oxidation film showed better corrosion resistance.
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备注/Memo
收稿日期： 2020-09-06；修回日期： 2020-11-21
通信作者： 赵光练（1986—），男，博士，副教授，email：zunyi_zhao1986@126.com
基金项目： 贵州省科技厅项目（2019黔科合基础1324号）