Characterization of Cr-α-Al2O3 Composite Coatings Electrodeposited from Cr(Ⅲ) Plating Bath
| Periodical | Applied Mechanics and Materials (Volumes 121 - 126) |
|---|---|
| Main Theme | Frontiers of Manufacturing and Design Science II |
| Edited by | Dongye Sun, Wen-Pei Sung and Ran Chen |
| Pages | 60-64 |
| DOI | 10.4028/www.scientific.net/AMM.121-126.60 |
| Citation | Xin Sun et al., 2011, Applied Mechanics and Materials, 121-126, 60 |
| Online since | October, 2011 |
| Authors | Xin Sun, Xiang Zhu He, Yong Xiu Wang, Zhi Hong Fu |
| Keywords | Composite Coating, Corrosion Resistance, Cr-α- Al2O3, Trivalent Chromium |
| Price | US$ 28,- |
Cr-α-Al2O3 composite coatings were prepared by direct current deposition experiments from Cr(Ⅲ) plating bath and the thickness of composite coatings could be up to 14 μm. The obtained Cr-α-Al2O3 coatings and Cr coatings were characterized by means of EDS, SEM and microhardness measurement. Results revealed that Cr-α-Al2O3 coatings exhibit fine-grained structure with uniform surface and the highest microhardness values(692 HV) when the α-Al2O3 content of coatings was 15g/L, although some pores and defects are still present in the coatings. Analysis of Tafel curves indicated that the presence of α-Al2O3 in the Cr coatings show better features in the corrosion resistance both in H2SO4 and NaOH solution than those prepared from the bath without α-Al2O3.
