| Preparation and corrosion electrochemistry behavior of cerium-based chemical conversion coating on AZ91 magnesium alloy | |
| Zhong Liying1; Cao Fahe1; Shi Yanyan1; Wen Qiang1; Zhang Zhao1; Zhang Jianqing1,2 | |
| Corresponding Author | Cao Fahe(nelson-cao@zju.edu.cn) |
| 2008-08-01 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 44Issue:8Pages:979-985 |
| Abstract | Ill order to develop an environmental friendly surface coating technolony for magnesium, a chrome-free Ce-based process to form a conversion coating on AZ91 magnesum alloy was investigated. The open circuit potential and polarization curves were used to research AZ91 electro-chemical behavior in Ce(NO3)(3) +H2O2 solution. Electrochemical impedance spectroscopy (EIS) was chosen to evaluate corrosion resistance due to it's low effect oil electrochemical test system for getting high reproduction restut. The effects of treatment time, temperature of electrolyte, concentration of Ce(NO3)(3) and accelerant concentration on corrosion resistance were summarized, while an optimized technology was achieved, 0.02 mol/L Ce(NO3)(3), 4 mL/J. accelerant at 35 degrees C for 35 min. The results indicated that the chemical conversion coating formed ill optimized technology presented yellow and impact, surface by naked eye, while took oil micro cracks oil the outer layer. The content of Cc ill the surface layer is high. Tafel plots indicated that conversion coating restrained the anodic and cathodic reaction on the interface. while the corrosion potential raised anodic 250 mV and corrosion current density decreased about 100 times. EIS results of optimal coating in NaCl solution for 96 h also indicated that the conversion coating protect the AZ91 magnesium alloy effectively in the first 60 h. |
| Keyword | AZ91 magnesium alloy cerium nitrate. corrosion resistance conversion coating |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000258786500016 |
| Publisher | SCIENCE CHINA PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/94029 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Cao Fahe |
| Affiliation | 1.Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China 2.Chinese Acad Sci, State Key Lab Corros & Protect, Inst Met Res, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Zhong Liying,Cao Fahe,Shi Yanyan,et al. Preparation and corrosion electrochemistry behavior of cerium-based chemical conversion coating on AZ91 magnesium alloy[J]. ACTA METALLURGICA SINICA,2008,44(8):979-985. |
| APA | Zhong Liying,Cao Fahe,Shi Yanyan,Wen Qiang,Zhang Zhao,&Zhang Jianqing.(2008).Preparation and corrosion electrochemistry behavior of cerium-based chemical conversion coating on AZ91 magnesium alloy.ACTA METALLURGICA SINICA,44(8),979-985. |
| MLA | Zhong Liying,et al."Preparation and corrosion electrochemistry behavior of cerium-based chemical conversion coating on AZ91 magnesium alloy".ACTA METALLURGICA SINICA 44.8(2008):979-985. |
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