-
摘要：金属材料作为应用最广泛的工程材料在社会发展中发挥着不可替代的作用，且在实际应用中，许多零件的工作环境都是很严酷的，在工件表面进行电镀处理使工件不仅有高的强度硬度，同时还要有好的耐磨性、耐热性、耐腐蚀等优秀的性能。38617
- 上一篇：年产0.8万吨锡青铜板带车间的冷轧工艺设计
- 下一篇：高层建筑防排烟系统“处方式”设计与性能化设计的对比研究
本文通过电沉积的方法制备了镍及其合金的金属镀层并研究了它们的性能。使用直流电沉积方法在低碳钢基底表面制备了镍钼的金属镀层，研究了电解液成分，镍钼原子量只比、电流密度对镀层耐蚀性能的影响，并对其结晶行为进行了深入的探讨。结果表明：当电流密度为0.6A/dm2、镍钼比6:1时，制备的样品，具有最正的腐蚀电位-699mV,最小的腐蚀电流密度3.25μA/cm2，实部阻抗达到2200Ω，SEM测试表明镀层光滑平整，XRD测试表明镀层中存在晶体和非晶体两种形式。以上测试结果共同印证镍钼合金沉积层使得金属的耐腐蚀性增加。
毕业论文关键词：镍钼原子量之比;电沉积;耐蚀性;电流密度
Electrodeposition and characterisation of nanocrystalline Ni–Mo coatings
Abstract: Metal material as the most widely used engineering materials plays an irreplaceable role in social development, and the use of metal material as the coating is important to apply them. In engineering, many parts of the working conditions are very harsh, not only requires them to have a high strength hardness, but also have excellent performance good wear resistance, heat resistance and corrosion resistance. Plating layer covering the surface of parts with excellent properties to meet this requirement, extend the working life of parts. With the development of science and technology, on the part of the increasingly high demand, therefore, the coating should also have a corresponding development in order to meet demand. Among the metal coating, nickel coating has the excellent performance, such as high hardness, strength and wear resistance, capable of most of the work environment, is the most studied metal plating. The method of producing metal coatings are a variety of commonly used methods such as spraying, chemical vapor deposition, sputtering, electrodeposition, and electrodeposition is recognized as the most economical method to adapt to a wide range of industrial production.
Keywords: Electrodeposition, Atomic weight than the nickel-molybdenum, Corrosion resistance, Current density.
目 录
1.绪论 1
1.1 引言 1
1.1.1课题背景 1
1.1.2课题的意义 2
1.2 电沉积层的结构 3
1.2.1金属电沉积层的形态结构与性能. 4
1.3 电沉积镍 4
1.3.1电沉积镍基金 5
1.3.2电沉积镍钼合金 5
1.3.3电沉积工艺 5
1.3.4镀层组织和性能 6
1.4 电沉积镍基合金的工艺研究 7
1.4.1工艺条件对镀层成分的影响 7
1.4.2电沉积镍基合金的结构 7
1.4.3镍基合金的电沉积机理 7
1.5 电沉积镍基合金的性能研究及应 8
2.实验方案和试剂样品 9
2.1 实验试剂和仪器 9
2.1.1镀层制备 9
2.1.2镀层性能测试 10
2.2 实验方案 11
2.2.1镀前处理 11
2.2.2镀后处理 11
2.3 测试方法 11
2.3.1SEM测试 11
2.3.2XRD测试 12
2.3.3电化学测试 12
3.实验结果讨论 14
3.1 样品的耐腐蚀性能分析 14
3.11极化曲线 14