Shi Min *,Du Yaosen.Corrosion resistance and mechanical property of Cu-WC composite coatings prepared by ultrasonic-assisted electrodeposition[J].Plating & Finishing,2025,(05):66-73.
doi: 10.3969/j.issn.1001-3849.2025.05.010超声波辅助电沉积Cu-WC复合镀层的耐腐蚀与机械性能
- Title:
- Corrosion resistance and mechanical property of Cu-WC composite coatings prepared by ultrasonic-assisted electrodeposition
- Keywords:
- Cu-WC composite coating; ultrasonic-assisted electrodeposition; corrosion resistance; tensile strength; scratch resistance
- 分类号:
- TQ153
- 文献标志码:
- A
- 摘要:
- 在电沉积Cu-WC复合镀层过程中引入超声波，通过改变超声波功率制备了5种Cu-WC复合镀层。研究了复合镀层的形貌、耐腐蚀性能、硬度与抗划伤性能，并与纯Cu镀层进行比较。结果表明：随着超声波功率从50 W提高到100 W，复合镀层的晶粒变小并且掺杂的WC颗粒增多，硬度提高，耐腐蚀性能和抗划伤性能增强；但当超声波功率达到200 W，复合镀层的晶粒粗化并且掺杂的WC颗粒量少，硬度降低，耐腐蚀性能和抗划伤性能变差。超声波功率为100 W时，电沉积的Cu-WC复合镀层致密性最好，并且较多WC颗粒呈分散状态掺杂在复合镀层中。该复合镀层的硬度较纯Cu镀层提高约100 HV，并且表现出较好的耐腐蚀性能与抗划伤性能。该复合镀层还能起到明显的表面强化作用，使基体的抗拉强度提高约45 MPa。
- Abstract:
- Ultrasonic was introduced during the electrodeposition of Cu-WC composite coating, and five kinds of Cu-WC composite coatings were prepared under different ultrasonic power. The morphology, corrosion resistance, hardness and scratch resistance of the composite coating were studied and compared with those of pure Cu coating. The results show that with the increase of ultrasonic power from 50 W to 100 W, the grains of the composite coating are refined, and the amount of embedded WC particles and hardness increased, improving the corrosion resistance and scratch resistance. However, when the ultrasonic power reaches 200 W, the grains of the composite coating are coarsened, and the amount of embedded WC particles and hardness decreased, weakening the corrosion resistance and scratch resistance. The Cu-WC composite coating electrodeposited under ultrasonic power of 100 W has compact structure, and more WC particles are embedded in a dispersed state. The hardness of the composite coating is about 100 HV higher than that of pure Cu coating, and it exhibits better corrosion resistance and scratch resistance. The composite coating can provide significant surface strengthening effect, improving the tensile strength of the substrate by about 45 MPa
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