| Cu-Zn合金金色表面膜的色泽特性和抗变色性研究 |
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| 引用本文： | 周珂,林高用,刘伯康,李坤,潘伟东.Cu-Zn合金金色表面膜的色泽特性和抗变色性研究[J].有色金属科学与工程,2017,8(1):63-69. |
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| 作者姓名： | 周珂 林高用 刘伯康 李坤 潘伟东 |
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| 作者单位： | 1.中南大学；a.材料科学与工程学院，b.有色金属材料科学与工程教育部重点实验室，长沙 410083 |
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| 基金项目： | 国家自然科学基金资助项目51271203 |
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| 摘 要： | 依据色度学原理和显微组织分析，采用XPS、EDS和SEM等手段研究Cu-Zn仿金合金的高温色泽特性和在模拟汗液中的变色行为，探究金色表面膜的成膜结构和抗变色机理.结果表明:通过高温仿金化处理和抗变色处理，可获得与24 K纯金表面色泽一致兼具优良抗变色性能的仿金合金；Zn元素的增加促使氧化膜外层首先生成大量ZnO，避免生成黑褐色的CuO；Cu-AMT和Cu-BTA分子在表面疏松的ZnO间隙中逐渐形成致密的保护膜，在50 ℃人工汗液中填补在α相和β相的缺陷处，取代间隙中的水分子和Cl-、NH+等腐蚀性离子，避免氯化物和氨化物等的生成破坏金色色泽.
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| 关 键 词： | 仿24 K纯金 Cu-Zn合金 抗变色 氧化膜 AMT/BTA |
| 收稿时间： | 2016-08-08 |
Color characteristics and anti-tarnish property of gold film of Cu-Zn alloy |
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| Affiliation: | 1.1a.School of Materials Science and Engineering; 1b.Key Laboratory of Science and Engineering of Ministry of Education of Nonferrous Metals, Central South University, Changsha 410083, China2.Zhejiang Jinsheng Copper Company, Xinchang 312000, China |
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| Abstract: | The Color characteristics at high-temperature and tarnishing behavior in artificial sweat solution of gold-imitation Cu-Zn alloy were studied according to charoma theory and microstructure analysis on the basis of scanning electron microscopy (SEM), energy disperse spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The structures and anti-tarnishing mechanism of golden film were also investigated. The results show that a 24 K-gold-like copper alloy with excellent color-stable property can be obtained through thermally gold-imitation treatment and anti-tarnish treatment. With the increase of Zn content, ZnO is formed rapidly while sepia CuO is suppressed on the outermost oxidation film at high temperature. The protective film made up of Cu-BTA molecules and Cu-AMT molecules on loose surface of ZnO gradually become compact, which can fill the defects caused by the drop of α-phase and β-phase in artificial sweat solution at 50 ℃. Additionally, water molecules, corrosive Cl-and NH+ in material clearance are displaced, avoiding the formation of chloride and amides with other colors. |
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