[1]章艳玲,李红玲*,姚玮玮,等.doi: 10.3969/j.issn.1001-3849.2025.12.004高硬度无铬达克罗涂层的制备及性能[J].电镀与精饰,2025,(12):27-35.
　Zhang Yanling,Li Hongling*,Yao Weiwei,et al.Preparation and properties of high hardness chromium-free dacromet coatings[J].Plating & Finishing,2025,(12):27-35.
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doi: 10.3969/j.issn.1001-3849.2025.12.004高硬度无铬达克罗涂层的制备及性能()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2025年12
页码:
27-35
栏目:
出版日期:
2025-12-31

文章信息/Info

Title:
Preparation and properties of high hardness chromium-free dacromet coatings
作者:
章艳玲; 李红玲*; 姚玮玮; 祁 圳; 董壮曼
(新乡学院 化学与材料工程学院 药学院,河南 新乡 453000 )
Author(s):
Zhang Yanling;  Li Hongling*;  Yao Weiwei;  Qi Chen;  Dong Zhuangman
(School of Chemistry and Materials Engineering College of Pharmacy , Xinxiang University, Xinxiang 453003, China )
关键词:
无铬达克罗涂层; 氧化钇纳米颗粒; 氧化石墨烯; 耐蚀性
Keywords:
chromate-free dacromet coating ;  Y2O3 nanoparticles;  graphene oxide;  corrosion resistance
分类号:
TG174.4；TQ050.9
文献标志码:
A
摘要:
为了提高无铬达克罗涂层的硬度和耐蚀性，分别制备了无铬达克罗涂料、Y2O3改性涂料、氧化石墨烯(GO)改性涂料和Y2O3+GO改性涂料，研究了4种处理工艺下涂层的形貌、硬度和耐腐蚀性。结果表明，Y2O3+GO改性涂层表面光滑、均匀、致密、无缺陷，比无铬达克罗涂层的显微硬度提高了46.17%，达到188.92 HV。经过480 h中性盐雾试验，Y2O3+GO改性涂层表面几乎没有出现红锈，而无铬达克罗涂层、Y2O3改性涂层和GO改性涂层表面出现了不同程度的红锈。电化学试验结果表明，Y2O3+GO改性涂层具有最大的腐蚀电位、最小的腐蚀电流密度和最大的极化电阻，与无铬达克罗涂层相比，自腐蚀电流密度降低了近一个数量级，极化电阻提高了5倍以上。盐水浸泡720 h后，Y2O3+GO掺杂改性具有协同作用，可同时起到封堵作用，能填补缝隙、孔洞等缺陷，有效防止了腐蚀性介质的侵入和腐蚀的发生。
Abstract:
In order to improve the hardness and corrosion resistance of chromium-free dacromet coatings, chromium-free dacromet coatings, Y2O3 modified coatings, graphene oxide (GO) modified coatings, and Y2O3+GO modified coatings were prepared. The morphology, hardness and corrosion resistance of the coatings under four treatment processes were studied. The results show that the Y2O3+GO modified coating surface is smooth, uniform, dense and defect free. Compared to the chromium free dacromet coating, the microhardness of the Y 2O3+GO modified coating increased by 46.17%, reaching 188.92 HV. After 480 h neutral salt spray test, there is almost no red rust on the surface of Y2O3+GO composite coating. However, the surfaces of chromium free dacromet coating, Y2O3 modified coating and GO modified coating show varying degrees of red rust. The electrochemical test results show that the Y 2O3+ GO modified coating has the highest corrosion potential, the lowest current density, and the highest polarization resistance. Compared with the chromium free dacromet coating, the Y2O3+GO modified coating reduces the self corrosion current density by nearly an order of magnitude and increases the polarization resistance by more than 5 times. After soaking in salt water for 720 h, Y2O3+GO doping modification has a synergistic effect and can simultaneously act as a sealing agent, filling gaps, holes and other defects, effectively preventing the invasion of corrosive media and the occurrence of corrosion

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更新日期/Last Update: 2025-12-17