Wang Jiwen,Li Qingpeng.Preparation and properties of electroplating zinc-nickel alloy/organic aluminum-rich composite coatings on carbon steel surface Liu Jianguo1*, Jin Ning 2, Wang Miao2, Zhang Bolun2, Han Li2, Han Changzhi3,[J].Plating & Finishing,2024,(10):56-66.
碳钢表面电镀锌镍/有机富铝复合涂层的制备与性能
- Title:
- Preparation and properties of electroplating zinc-nickel alloy/organic aluminum-rich composite coatings on carbon steel surface Liu Jianguo1*, Jin Ning 2, Wang Miao2, Zhang Bolun2, Han Li2, Han Changzhi3,
- Keywords:
- electroplating zinc-nickel alloys; organic aluminum-rich; composite coating; corrosion resistance
- 分类号:
- TQ630
- 文献标志码:
- A
- 摘要:
- 为提高碳钢表面电镀锌镍的防护性能和应用限制，采用电镀锌镍层作为底层，有机富铝涂层作为顶层，设计出一种复合涂层防护体系。采用扫描电镜(SEM)、能谱(EDS)、中性盐雾试验、电化学测试等手段对电镀锌镍/有机富铝复合涂层的表面/截面形貌及耐蚀性进行表征与分析。结果表明：电镀锌镍/有机富铝复合涂层表面光滑平整，无明显缺陷，复合涂层体系界面结合良好，无分层现象，经1500 h中性盐雾试验后复合涂层无红锈。复合涂层较单独的电镀锌镍合金层腐蚀电流密度降低了2个数量级，表现出受控的牺牲阳级作用，并实现了在海洋防护领域的应用。复合涂层有效提升了电镀锌镍层的耐腐蚀性能，拓宽了电镀锌镍层在腐蚀防护领域的应用范围。
- Abstract:
- In order to improve the protection performance and application restrictions of galvanized nickel alloys on the surface of carbon steel, the electroplating zinc-nickel layer was used as the bottom layer, and the organic aluminum coating was used as the top layer to design a composite coating protection system. The surface/section of the surface/section of the composite coating of electroplating nickel/organic aluminum coating and analysis. The surface/cross section morphology and corrosion resistance of Ni/Al composite coatings were characterized and analyzed by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), neutral salt spray test and electrochemical test. The results show that the surface of the organic aluminum coating is smooth and flat, without obvious defects. The composite coating system interface is well -combined and there is no layered phenomenon. After 1500 h neutral salt fog test, the composite coating is not red rust. The corrosion current density of the composite coating is 2 orders lower than that of the single electro Zn-Ni alloy layer, and the composite coating shows excellent protective performance, which will realize the application in the field of Marine protection. The composite coating has a higher corrosion resistance compared to the separate electroplating Zn-Ni alloy layer, which effectively solves the protection limit of electroplating nickel alloys in applications
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