化学镀液中NiSO4·6H2O浓度对镀速及镀层硬度的影响
Journal of Shenyang Ligong University(2013)
Abstract
在TC4钛合金表面制备了Ni-P低磷化学镀层,研究了镀液中NiSO4·6H2O浓度对镀层沉积速度及镀层硬度的影响.采用紫外可见光分光光度计、扫描电镜及能谱仪、显微硬度仪分别对镀液中的NiSO4·6H2O浓度,镀层的表面形貌和化学成分,镀层的硬度进行测定.结果表明:化学镀液最佳施镀周期为60min.镀液中NiSO4·6H2O浓度对化学反应速率有重要影响,当浓度差达到临界值4.77g/L,沉积速度显著降低.随着反应进行,晶胞尺寸逐渐增大,晶粒粗化;同时镀层磷含量逐渐升高,镀层结构由晶态向微晶态转化,塑性变形抗力降低,硬度降低.
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Key words
concentration,low phosphorus,electroless plating
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