Li Ning.Ultrasonic assisted electrodeposition of Zn-Ni-P/nano-ZrO 2 composite coatings on iron matrix and their properties[J].Plating & Finishing,2023,(7):8-16.[doi:10.3969/j.issn.1001-3849.2023.07.002]
超声波辅助铁基体电沉积Zn-Ni-P/纳米ZrO2复合镀层及性能研究
- Title:
- Ultrasonic assisted electrodeposition of Zn-Ni-P/nano-ZrO 2 composite coatings on iron matrix and their properties
- 关键词:
- Zn-Ni-P/ 纳米 ZrO 2 复合镀层; 超声波辅助电沉积; ZrO 2 颗粒; 耐磨性能; 耐腐蚀性能
- Keywords:
- Zn-Ni-P/nano-ZrO 2 composite coating ; ultrasonic assisted electrodeposition ; ZrO 2 particles ; wear resistance ; corrosion resistance
- 分类号:
- TQ153
- 文献标志码:
- A
- 摘要:
- 通过电沉积并辅助超声波振荡在铁基体上制备出 Zn-Ni-P/ 纳米 ZrO 2 复合镀层。研究了镀液中 ZrO 2 颗粒浓度对复合镀层中 ZrO 2 颗粒含量以及复合镀层表面形貌、相结构、硬度、耐磨性能和耐腐蚀性能的影响。结果表明:随着镀液中 ZrO 2 颗粒浓度从 5 g/L 增加至 30 g/L , ZrO 2 颗粒含量呈现先升高后降低趋势,复合镀层的形貌特征发生变化,导致硬度、耐磨性能和耐腐蚀性能存在差异,但不同复合镀层的相结构无明显差异,都含有单质 Zn 、 Ni 5 Zn 21 和 ZrO 2 相。镀液中 ZrO 2 颗粒浓度为 20 g/L 时,复合镀层中 ZrO 2 颗粒含量达到 10.43% ,该复合镀层的晶粒细小且结合紧密,表现出良好的致密性,硬度达到 503.5 HV ,平均摩擦系数和磨损失重仅为 0.48 和 3.42 mg ,电荷转移电阻和低频端阻抗值分别达到 6.34×10 3 Ω ·cm 2 和 6.84×10 3 Ω ·cm 2 ,其性能与 Zn-Ni-P 合金镀层相比显著提高。适当增加镀液中 ZrO 2 颗粒浓度有利于提高复合镀层中 ZrO 2 颗粒含量,使复合镀层的晶粒明显细化且致密性改善,具有较强的阻碍局部塑性变形和承载能力,并且能有效抑制电化学腐蚀,从而表现出更好的性能。
- Abstract:
- : Zn-Ni-P/nano-ZrO 2 composite coatings were prepared on iron matrix by ultrasonic assisted electrodeposition , and the effect of ZrO2 particles concentration in the plating solution on the content of ZrO 2 particles in the composite coating and the surface morphology , phase structure , hardness , wear resistance and corrosion resistance of the composite coating was studied. The results showed that , with the increase of ZrO2 particles concentration in the plating solution from 5 g/L to 30 g/L , the content of ZrO 2 particles increased first and then decreased , and the morphology characteristics of the composite coating changed , resulting in obvious differences in the hardness , wear resistance and corrosion resistance. However , there is no significant difference in the phase structure , and different composite coatings all contain elemental Zn , Ni 5 Zn 21 and ZrO 2 phases. When the ZrO2 particles concentration in the plating solution is 20 g/L , the content of ZrO 2 particles in the composite coating reaches 10.43%. The composite coating has fine and tightly-bonded grains and shows good compactness , and the hardness reaches 503.5 HV. The average friction coefficient and wear weightlessness are only 0.48 and 3.42 mg , and the charge-transfer resistance and low-frequency terminal impedance are 6.34×10 3 Ω ·cm 2 and 6.84×10 3 Ω ·cm 2 , respectively. The performance of composite coating is significantly improved compared with that of Zn-Ni-P alloy coating. Appropriately increasing the concentration of ZrO2 particles in the plating solution is beneficial to increase the content of ZrO 2 particles in the composite coating , so that the grains of the composite coating is significantly refined and the compactness is improved , which has a strong resistance to the local plastic deformation and bearing capacity , and effectively inhibits the electrochemical corrosion , thus resulting in better performance.
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备注/Memo
收稿日期: 2022-11-03 修回日期: 2022-11-13 作者简介: 李宁( 1986 ―),硕士,讲师,研究方向为纳米材料、表面工程等, email : Teach_li252001@126.com 基金项目: 山东省自然科学基金面上项目( ZR2021ME132 );山东省教育科学“十三五”规划课题( 2020ZC273 )?/html>