Preparation of cerium oxide based environment-friendly chemical conversion coating on magnesium alloy with additives

2011 ◽  
Vol 21 (8) ◽  
pp. 1905-1910 ◽  
Author(s):  
Dong-chu CHEN ◽  
Jian-feng WU ◽  
Yi-qing LIANG ◽  
Shu-lin YE ◽  
Wen-fang LI
Keyword(s):  
Magnesium Alloy ◽  
Cerium Oxide ◽  
Chemical Conversion ◽  
Conversion Coating ◽  
Environment Friendly ◽  
Chemical Conversion Coating

Cerium-based chemical conversion coating on AZ63 magnesium alloy

2003 ◽  
Vol 172 (2-3) ◽  
pp. 227-232 ◽  
Author(s):  
Manuele Dabalà ◽  
Katya Brunelli ◽  
Enrico Napolitani ◽  
Maurizio Magrini
Keyword(s):  
Magnesium Alloy ◽  
Chemical Conversion ◽  
Conversion Coating ◽  
Chemical Conversion Coating

Formation and Properties of Zr/Ti Based Nano-Sized Non-Chromium Chemical Conversion Coating on AA 5083

2019 ◽  
Vol 19 (6) ◽  
pp. 3487-3494 ◽  
Author(s):  
Bin Liu ◽  
Yi Zhao ◽  
Liang Li ◽  
Yafei Feng ◽  
Zhigang Fang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Acidic Solution ◽  
Salt Spray ◽  
Chemical Conversion ◽  
Conversion Coating ◽  
Dense Layer ◽  
Environment Friendly ◽  
Chemical Conversion Coating ◽  
Inhibitive Action ◽  
Nano Size

An environment-friendly non-chromium chemical conversion coating was obtained from fluozirconate/fluotitanate acidic solution for the corrosion protection of AA 5083. The surface morphology, composition, electrochemical behavior and corrosion resistance of this coating were investigated. The coating was found to be a homogeneous and dense layer consisting of nano-size particles, of which the major component was compound oxides consisted by Al, Mg, Zr, Ti, F and O. The results of electrochemical measurements, immersion and natural salt spray (NSS) tests demonstrated that the corrosion resistance of the AA 5083 H-116 was improved by the nano-sized non-chromium chemical conversion coating considerably, which was most attributed to the great inhibitive action on the anodic dissolution by acting as a protective barrier layer.

An investigation of new barium phosphate chemical conversion coating on AZ31 magnesium alloy

2012 ◽  
Vol 210 ◽  
pp. 156-165 ◽  
Author(s):  
Yougui Chen ◽  
Ben Li Luan ◽  
Guang-Ling Song ◽  
Qi Yang ◽  
David M. Kingston ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Chemical Conversion ◽  
Conversion Coating ◽  
Az31 Magnesium Alloy ◽  
Chemical Conversion Coating

A Study of the Environment–Friendly Chrome-Free Chemical Conversion Coating on 2024 Aluminium Alloy

2008 ◽  
Vol 575-578 ◽  
pp. 864-868
Author(s):  
Dong Chu Chen ◽  
Wen Hui Gong ◽  
Zhu Zhou Huang ◽  
Wen Fang Li
Keyword(s):  
Aluminium Alloy ◽  
Sodium Molybdate ◽  
Chemical Conversion ◽  
Conversion Coating ◽  
Micro Structure ◽  
Solution Composition ◽  
Environment Friendly ◽  
Chromium Compounds ◽  
Chemical Conversion Coating ◽  
Micro Analysis

In order to develop an environment-friendly method of forming a chemical conversion coating on 2024 aluminium alloy surface without the toxic hexavalent chromium compounds, in this paper a process with sodium molybdate and potassium permanganate as the main compositions of the treating bath has been investigated. Solution composition and process parameters have been optimized. The chemical conversion coating has good corrosion resistance, evaluated with dropping test. Micro-structure and components of the conversion coating have been studied by various micro-analysis methods, and the growth mechanism of the chemical conversion coating has also been investigated.

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