| 锌表面稀土化学钝化及耐蚀性研究 |
| |
| 引用本文： | 龙晋明,杨宁,陈庆华,司云森.锌表面稀土化学钝化及耐蚀性研究[J].稀有金属,2002,26(2):98-102. |
| |
| 作者姓名： | 龙晋明 杨宁 陈庆华 司云森 |
| |
| 作者单位： | 昆明理工大学材料与冶金工程学院,昆明,650093 |
| |
| 基金项目： | 云南省自然科学基金资助项目 ( 98E0 42M) |
| |
| 摘 要： | 采用三价铈盐对锌进行化学钝化处理 ,研究了有关工艺参数对锌表面稀土转化膜耐蚀性的影响 ,测量了钝化过程中试样的交流阻抗谱 (EIS)和表面显微硬度的变化 ,探讨了稀土转化膜的形成机理 ,并对成膜动力学进行了分析。随着钝化液的铈盐浓度、pH值、温度和处理时间的增加 ,稀土转化膜的耐蚀性也相应提高 ,一定条件下可达到或优于铬酸盐钝化的防蚀性能。稀土钝化成膜反应动力学符合Arrhenius方程 ,反应活化能约为 6 4 8kJ/mol。
|
| 关 键 词： | 锌 无铬钝化 稀土转化膜 耐蚀性 |
| 文章编号： | 0258-7076(2002)02-0098-05 |
Corrosion Protection of Zinc by Rare-earth Metal Passivation Treatment |
| |
| Long Jinming,Yang Ning,Chen Qinghua and Si Yunsen.Corrosion Protection of Zinc by Rare-earth Metal Passivation Treatment[J].Chinese Journal of Rare Metals,2002,26(2):98-102. |
| |
| Authors: | Long Jinming Yang Ning Chen Qinghua and Si Yunsen |
| |
| Abstract: | The tests of rare earth metal passivation treatment on the surface of zinc by immersing specimens into rare earth salt solution were performed. Effect of some factors related to the passivation condition on the corrosion protection of the cerous conversion coating formed on the specimens was studied. Changes in the electrochemical impedance spectroscopy(EIS) and surface microhardness of the specimens were examined during passivation process. The mechanism of the formation of cerous conversion coating was discussed and its kinetics was analysed. The results show that the anticorrosive performance of the cerous coatings is increased with the increase of cerous salt concentration, pH value and temperature of the solution and immersion time, and can achieve or surpass the levels of corrosion protection of the chromate coatings under certain treating conditions. The reaction kinetics of the formation of cerous conversion coating during passivation is accordant with the Arrhenius equation in which the activation energy is about 64 8 kJ/mol |
| |
| Keywords: | Zinc Chromate free passivation Rare earth metal conversion coating Corrosion resistance |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
