| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8023701 | Surface and Coatings Technology | 2018 | 11 Pages |
Abstract
The degradation of micro-arc oxidation coating (MAO)/chitosan (CS) coating decreases solution pH value at lower level (â¤8.25) in comparison to MAO coating. A self-degradation mechanism of CS-based materials is proposed. And the degradation process experiences three stages: (1) initial water diffusion, absorption and hydration of CS coatings; (2) gradual decrease in molecular weight; and (3) scission and dissolution of oligomers and monomers. Thus, the degraded CS releases -NH3+ ions, which react with MgO of MAO coating and lead to the formation of Mg2+ ions and water along with the micro-cracks and pores of the MAO coating.272
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Authors
Chi Yu, Lan-Yue Cui, Yong-Feng Zhou, Zhuang-Zhuang Han, Xiao-Bo Chen, Rong-Chang Zeng, Yu-Hong Zou, Shuo-Qi Li, Fen Zhang, En-Hou Han, Shao-Kang Guan,