[1]杨永亮,张泓筠,莫秋燕,等.doi: 10.3969/j.issn.1001-3849.2026.04.003银制品表面氧化铝保护膜的机械与耐腐蚀性能[J].电镀与精饰,2026,(04):18-24.
　YANG Yongliang,ZHANG Hongyun,MO Qiuyan,et al.Mechanical and corrosion resistance properties of alumina protective coatings on silver substrates[J].Plating & Finishing,2026,(04):18-24.
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doi: 10.3969/j.issn.1001-3849.2026.04.003银制品表面氧化铝保护膜的机械与耐腐蚀性能()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2026年04
页码:
18-24
栏目:
出版日期:
2026-04-30

文章信息/Info

Title:
Mechanical and corrosion resistance properties of alumina protective coatings on silver substrates
作者:
杨永亮1; 张泓筠2; 莫秋燕2; 李 娜1; 付秀华3
(1. 皖西学院 电气与光电工程学院,安徽 六安 237012 ;2. 凯里学院 微纳和智能制造教育部工程研究中心,贵州 凯里 556011 ;3. 长春理工大学 中山研究院,广东 中山 528437)
Author(s):
YANG Yongliang1;  ZHANG Hongyun2;  MO Qiuyan2;  LI Na1;  FU Xiuhua3
(1. School of Electrical and Photoelectronic Engineering, West Anhui University, Luan 237012, China; 2. Engineering Research Center of Micro-Nano and Intelligent Manufacturing of Ministry of Education, Kaili University, Kaili 556011, China; 3. Zhongshan Research Institute of Changchun University of Technology, Zhongshan 528437, China)
关键词:
银制品; 原子层沉积; 氧化铝保护膜; 耐腐蚀性
Keywords:
silver products;  atomic layer deposition;  alumina protective coatings;  corrosion resistance
分类号:
TQ050
文献标志码:
A
摘要:
为提高银制品的机械与耐腐蚀性能，采用热原子层沉积技术，以三甲基铝(TMA)和水为前驱体，在抛光后的925银表面制备了不同厚度的氧化铝保护膜。结果表明，膜厚与色差(ΔE)呈非线性关系，当膜厚为125 nm时存在色差极小值且不影响银制品外观；沉积125 nm保护膜后，初始接触角由77.7°降至58.1°，暴露于空气中逐渐增大至72.8°；压痕测试表明，镀膜后最大纳米压痕硬度提升至基底的5.5倍，但显微硬度未见提升。纳米划痕测试中，保护膜在法向载荷488 μN、划痕深度122nm时失效；低载荷摩擦磨损实验表明，镀膜后摩擦系数增大，且保护膜在持续摩擦86 s时失效；耐腐蚀测试中，镀膜样品在0.1 mol/L的硫化钠溶液中浸泡40 min未发生腐蚀变色，然而硫化钠溶液对保护膜的侵蚀是最终发生腐蚀的主要原因。
Abstract:
To enhance the mechanical properties and corrosion resistance of silver products, alumina protective coatings with varying thicknesses were deposited onto polished sterling silver substrates using thermal atomic layer deposition with trimethylaluminum (TMA) and H 2O as precursors. Results indicate that the coatings thickness exhibits a nonlinear relationship with the color difference (ΔE). A minimum ΔE value was observed at the optimal thickness of 125 nm, which preserved the silver ’s visual appearance. After depositing the Al?O? coating of 125 nm, the initial contact angle on polished 925 silver decreased from 77.7° to 58.1°, then gradually increased to 72.8° upon air exposure. Nanoindentation tests reveal a 5.5-fold increase in maximum nanohardness compared to the bare substrate, though no significant improvement in microhardness was detected. During nanoscratch testing, coating failure occurred at a normal load of 488 μN and a scratch depth of 122 nm. Low-load tribological measurements indicate an friction coefficient increases for coated samples, with coating failure occurring after 86 s of continuous sliding. Corrosion resistance testing show no visible tarnishing after 40 min immersion in 0.1 mol/L Na?S solution. However, the corrosion of protective coating by sulfide ions is identified as the primary mechanism ultimately leading to corrosion failure

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更新日期/Last Update: 2026-04-15