Guo Wei,Li Tong*.Corrosion resistance and mechanical properties of Zn-Ni-W alloy coatings electrodeposited on red copper[J].Plating & Finishing,2023,(11):18-26.[doi:10.3969/j.issn.1001-3849.2023.11.003]
紫铜电沉积 Zn-Ni-W 合金镀层的耐腐蚀与机械性能?/div>
- Title:
- Corrosion resistance and mechanical properties of Zn-Ni-W alloy coatings electrodeposited on red copper
- 关键词:
- Zn-Ni-W 合金镀层; 钨酸钠浓度; 耐腐蚀性能; 耐磨性能; 弹性恢复性能
- Keywords:
- Zn-Ni-W alloy coating ; concentration of sodium tungstate ; corrosion resistance ; wear resistance ; elastic recovery performance
- 分类号:
- TQ153
- 文献标志码:
- A
- 摘要:
- 采用含有钨酸钠的镀液，通过电沉积将 W 元素引入 Zn-Ni 合金镀层中，以期获得具有优良耐腐蚀与机械性能的 Zn-Ni-W 合金镀层。研究了钨酸钠浓度对 Zn-Ni-W 合金镀层的表面形貌、成分、相结构、耐腐蚀性能、硬度、耐磨性能以及弹性恢复性能的影响。结果表明：添加适量钨酸钠制备的 Zn-Ni-W 合金镀层晶粒类似花蕊状，以缠绕形式结合紧密起到强化效果，其耐腐蚀性能、硬度、耐磨性能和弹性恢复性能相比于 Zn-Ni 合金镀层提高，但 Zn-Ni-W 合金镀层的物相组成与 Zn-Ni 合金镀层相同。当钨酸钠浓度为 35 g/L 时，由于电沉积 Zn-Ni-W 合金镀层过程中引起较大程度晶格畸变，致使晶粒呈花蕊状缠绕结合更紧密，起到较好的强化效果。该镀层具有最低的腐蚀电流密度 9.74×10 - 7 A/cm 2 ，对紫铜基体的防护效率达到 98.4% ，硬度达到 378.2 HV ，较 Zn-Ni 合金镀层提高约 160 HV ，还表现出优良的耐磨性能和弹性恢复性能。
- Abstract:
- ： In order to obtain a Zn-Ni-W alloy coating with excellent corrosion resistance and mechanical properties ， W element was introduced into the Zn-Ni alloy coating via electrodeposition from the plating solution containing sodium tungstate. The effect of sodium tungstate concentration on the surface morphology ， composition ， phase structure ， corrosion resistance ， hardness ， wear resistance and elastic recovery properties of Zn-Ni-W alloy coating was investigated. The results show that the Zn-Ni-W alloy coating prepared by adding an appropriate amount of sodium tungstate has flower-like grains and is tightly bonded in the form of winding playing a strengthening effect. The corrosion resistance ， hardness ， wear resistance and elastic recovery properties of Zn-Ni-W alloy coating are better than those of Zn-Ni alloy coating ， but the phase composition of Zn-Ni-W alloy coating is the same as that of Zn-Ni alloy coating. When the sodium tungstate concentration is 35 g/L ， the electrodeposition process of Zn-Ni-W alloy coating causes a large degree of lattice distortion ， resulting in winding staminal and tighter binding of the grains ， which plays a better strengthening effect. The Zn-Ni-W alloy coating has the lowest corrosion current density of 9.74×10 - 7 A/cm 2 ， and the protection efficiency on red copper matrix reaches 98.4%. The hardness of the Zn-Ni-W alloy coating reaches 378.2 HV ， which is about 160 HV higher than that of Zn-Ni alloy coating ， and it also shows excellent wear resistance and elastic recovery properties.
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备注/Memo
收稿日期： 2022-12-24 修回日期： 2023-01-08 作者简介： 郭伟（ 1982 ―），硕士，副教授，主要研究方向为机械材料、表面工程， email ： Henan_edu@126.com 通信作者： 李桐（ 1984 ―），博士，副教授，主要研究方向为功能材料、机电工程， email ： li18916550@126.com 基金项目： 河南省重点研发与推广专项项目（ 202102310204 ）