采用动电位扫描、扫描电子显微镜和X-射线衍射分析分别研究了不同质量浓度的糖精和1,4-丁炔二醇对镍电沉积层的极化作用、表面形貌及晶体取向的影响。结果表明:在瓦特镀镍液中加入糖精和1,4-丁炔二醇,极化曲线均向负电位方向移动。糖精...采用动电位扫描、扫描电子显微镜和X-射线衍射分析分别研究了不同质量浓度的糖精和1,4-丁炔二醇对镍电沉积层的极化作用、表面形貌及晶体取向的影响。结果表明:在瓦特镀镍液中加入糖精和1,4-丁炔二醇,极化曲线均向负电位方向移动。糖精质量浓度增加至2.0 g/L时,极化曲线不再向负电位方向移动,镀层呈现(200)面择优取向。当1,4-丁炔二醇质量浓度增加到0.5 g/L时,其显著提高了镍电沉积过电位230 m V,有效增大成核密度,其镀层微观形貌平整均匀,择优取向并未发生改变。展开更多
The Ni-Cr alloy electrodepositing technology on iron substrate in the chlorid-sulfate solution and the impacts of main processing parameters on coating composition were studied. The optimal Ni-Cr alloy electrodepositi...The Ni-Cr alloy electrodepositing technology on iron substrate in the chlorid-sulfate solution and the impacts of main processing parameters on coating composition were studied. The optimal Ni-Cr alloy electrodepositing conditions are that the cathode current density is 16 A/dm^2,the plating solution temperature is 30℃ and the pH value is 2.5. The bright, compact coating gained under the optimal conditions has good cohesion and 24.1% Cr content. The results show that the coating is composed of crystalline, the average grain size is 82 nm and the higher the Cr content of coating, the larger the rigidity, and the higher the corrosion resistance. The rigidity of coating reaches 78.6(HR30T) and the passivation area broadens to 1.4 V when the Cr content of coating is 24.1%.展开更多
文摘采用动电位扫描、扫描电子显微镜和X-射线衍射分析分别研究了不同质量浓度的糖精和1,4-丁炔二醇对镍电沉积层的极化作用、表面形貌及晶体取向的影响。结果表明:在瓦特镀镍液中加入糖精和1,4-丁炔二醇,极化曲线均向负电位方向移动。糖精质量浓度增加至2.0 g/L时,极化曲线不再向负电位方向移动,镀层呈现(200)面择优取向。当1,4-丁炔二醇质量浓度增加到0.5 g/L时,其显著提高了镍电沉积过电位230 m V,有效增大成核密度,其镀层微观形貌平整均匀,择优取向并未发生改变。
基金Project (59674025) supported by the National Natural Science Foundation of China
文摘The Ni-Cr alloy electrodepositing technology on iron substrate in the chlorid-sulfate solution and the impacts of main processing parameters on coating composition were studied. The optimal Ni-Cr alloy electrodepositing conditions are that the cathode current density is 16 A/dm^2,the plating solution temperature is 30℃ and the pH value is 2.5. The bright, compact coating gained under the optimal conditions has good cohesion and 24.1% Cr content. The results show that the coating is composed of crystalline, the average grain size is 82 nm and the higher the Cr content of coating, the larger the rigidity, and the higher the corrosion resistance. The rigidity of coating reaches 78.6(HR30T) and the passivation area broadens to 1.4 V when the Cr content of coating is 24.1%.
