氧化镱对碳钢表面化学镀Ni-Zn-P合金的影响

发布时间：2018-10-14 18:05

【摘要】：目的改善Ni-Zn-P合金镀层的制备工艺和镀层的物理性能。方法鉴于稀土镧系元素因特殊电子结构表现出优异的物理和化学性能,向基础镀液中添加Yb2O3,在低碳钢钢管表面化学镀沉积NiZn-P合金镀层。通过称量法算得沉积速率,通过盐水浸泡实验测试镀层耐蚀性,采用扫描电镜观察镀层的表面形貌,用X-射线衍射仪检测镀层的晶体结构,考察镀液中Yb2O3浓度对镀层的沉积速率、表面形貌、耐蚀时间、晶体结构等的影响。结果随着Yb2O3浓度的增大,镀层的沉积速率呈先升高、后下降的趋势,镀层的表面形貌、耐蚀时间和晶体结构均是先得到改善,而后被削弱。向基础镀液中添加15 mg/L Yb2O3后,镀速提高了21.6%,耐蚀时间延长了16.7%,镀层由粗糙、灰暗、不均匀和有缺陷,变为平整、光亮、均匀和致密,镀层的非晶相程度得到一定强化,耐蚀性能有所提高。结论基础镀液中添加Yb2O3的适宜质量浓度为15 mg/L,该条件下可提高Ni-Zn-P合金的镀速,并改善镀层的质量。
[Abstract]:Objective to improve the preparation process and physical properties of Ni-Zn-P alloy coating. Methods in view of the excellent physical and chemical properties of rare earth lanthanide because of its special electronic structure, Yb2O3, was added to the base bath to deposit NiZn-P alloy coating on the surface of low carbon steel tube. The deposition rate was calculated by weighing method, the corrosion resistance of the coating was tested by salt water immersion test, the surface morphology of the coating was observed by scanning electron microscope, and the crystal structure of the coating was examined by X-ray diffraction. The effects of Yb2O3 concentration on deposition rate, surface morphology, corrosion resistance time and crystal structure were investigated. Results with the increase of Yb2O3 concentration, the deposition rate of the coating increased first, then decreased. The surface morphology, corrosion resistance time and crystal structure of the coating were first improved and then weakened. After adding 15 mg/L Yb2O3 to the base bath, the plating speed was increased by 21.6, and the corrosion resistance time was prolonged by 16.7.The coating changed from rough, gray, uneven and defective to flat, bright, uniform and compact, and the amorphous phase of the coating was strengthened to a certain extent. Corrosion resistance has been improved. Conclusion the optimum concentration of Yb2O3 in the base bath is 15 mg/L, which can improve the speed of Ni-Zn-P alloy plating and the quality of the coating.
【作者单位】：南昌大学科技学院生化系;南昌大学环境与化工学院;
【基金】：国家自然科学基金(11105067)~~
【分类号】：TG174.4

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