[1]贾鹏翔,龙 飞,胡素荣,等.doi: 10.3969/j.issn.1001-3849.2026.03.015锌镍镀层腐蚀失效分析及耐蚀机理[J].电镀与精饰,2026,(03):115-122.
　JIA Pengxiang,LONG Fei,HU Surong,et al.Failure analysis and corrosion resistance mechanism of Zn/Ni coatings[J].Plating & Finishing,2026,(03):115-122.
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doi: 10.3969/j.issn.1001-3849.2026.03.015锌镍镀层腐蚀失效分析及耐蚀机理()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2026年03
页码:
115-122
栏目:
出版日期:
2026-03-31

文章信息/Info

Title:
Failure analysis and corrosion resistance mechanism of Zn/Ni coatings
作者:
贾鹏翔1; 2; 龙 飞2; 胡素荣2; 刘建华1; 杜东兴2; 叶作彦2
(1. 西南交通大学 材料科学与工程学院,四川 成都 610031 ;2. 中国工程物理研究院 机械制造工艺研究所,四川 绵阳 621022)
Author(s):
JIA Pengxiang1; 2;  LONG Fei2;  HU Surong2;  LIU Jianhua1;  DU Dongxing2;  YE Zuoyan2
(1. School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. Institute of Mechanical Manufacturing Process, China Academy of Engineering Physics, Mianyang 621022, China)
关键词:
锌镍镀层; 失效分析; 耐蚀性; 腐蚀产物
Keywords:
zinc-nickel coatings;  failure analysis;  corrosion resistance;  corrosion products
分类号:
TQ153.2
文献标志码:
A
摘要:
为阐明锌镍镀层在中性盐雾环境中的腐蚀失效机制，明确其在不同腐蚀阶段的防护机制与电化学行为特征，为该类镀层的实际防护应用提供理论依据，在45钢基体上制备了厚度约10 μm锌镍镀层，对比不同盐雾暴露时间下镀层的微观形貌、物相组成、耐蚀性能及腐蚀产物元素分布演变规律。结果表明，锌镍镀层的防护机制呈现明显的阶段性特征：防护初期主要依赖钝化膜的物理阻隔作用；中期则依靠非晶态Zn5(OH)8Cl2?H2O对腐蚀坑的填充以及锌的牺牲阳极保护作用共同减缓腐蚀进程；后期因Zn5(OH)8Cl2?H2O由非晶态向晶态转变，产物连续性下降，形成腐蚀介质渗透通道，防护性能快速减弱。整体而言，锌镍镀层腐蚀进程先后经历因吸水活化导致的腐蚀加速、非晶腐蚀产物覆盖带来的保护性增强、以及晶态产物形成后屏障效应丧失所致的腐蚀再次加速3个典型阶段。
Abstract:
To elucidate the corrosion failure mechanism of zinc-nickel coatings in a neutral salt spray environment and to clarify their protective mechanisms and electrochemical behaviors at different corrosion stages, thereby providing a theoretical basis for the practical protective application of such coatings, a zinc-nickel coating with a thickness of approximately 10 μm was prepared on a 45 steel substrate. The evolution of micro morphology, phase composition, corrosion resistance, and elemental distribution of corrosion products of the coating under various salt spray exposure times were systematically compared. The results indicate that the protective mechanism of the zinc-nickel coating exhibits distinct stage-specific characteristics. In the initial stage, protection relies primarily on the physical barrier effect of the passive film. In the middle stage, corrosion progression is synergistically slowed by the filling of corrosion pits by amorphous Zn 5(OH)8Cl2?H2O and the sacrificial anode protection provided by zinc. In the final stage, the transition of Zn5(OH)8Cl2?H2O from an amorphous to a crystalline state reduces the continuity of the corrosion products, forming channels for corrosive media penetration and leading to a rapid decline in protective performance. Overall, the corrosion behavior of the zinc-nickel coating progresses through three typical stages. Initial acceleration due to water absorption and activation, enhanced protection due to coverage by amorphous corrosion products, and re-acceleration of corrosion resulting from the loss of barrier effect after crystallization

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更新日期/Last Update: 2026-03-11