Cerium chemical conversion coating on a novel Mg-Li alloy |
| |
| Authors: | Lili Gao Chunhong Zhang and Milin Zhang |
| |
| Affiliation: | (1) Edificio D Facultad de Qu?mica, Departamento de Ingenier?a Metal?rgica, Universidad Nacional Aut?noma de M?xico, Ciudad Universitaria, C.P.04510 M?xico, DF, M?xico;(2) Grupo de Ingenier?a en Procesamiento de Materiales CICATA-IPN, Instituto Polit?cnico Nacional, Unidad Altamira. Km 14.5, Carretera Tampico-Puerto Industrial Altamira, C. P. 89600 Altamira, Tamaulipas, M?xico; |
| |
| Abstract: | A novel Mg-Li alloy was treated in a cerium nitrate solution and cerium chemical conversion coating was obtained on the alloy.
Then the forming process, structure and corrosion resistance of the coating were investigated. The influential factors of
cerium conversion coating were discussed through orthogonal experiments, and the optimum processing parameters were confirmed.
XPS spectra displayed that the conversion coating consisted of cerium compounds, and the major component of the protective
layer was a mixture of Ce (IV) oxide and Ce (IV) hydroxide. In addition, XRD pattern illustrated that there was crystalline
CeO2 in the conversion coating. Analysis by SEM showed that the cerium conversion coating was uniform with a fiber-like morphology.
The thickness of the conversion coating was 12 μm. The results of electrochemical potentiodynamic polarization and hydrogen
evolution measurement indicated that the cerium conversion coating provided effective protection to the novel Mg-Li alloy. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
