Improving the protective properties of La-conversion coating on α-brass surface by the combined use of La2O3 nanoparticles incorporation and electrodeposition
✍ Scribed by H. Q. Fan; S. Y. Li; Z. C. Zhao; H. Wang; Z. C. Shi
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- German
- Weight
- 569 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0947-5117
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✦ Synopsis
Abstract
The La~2~O~3~ nanoparticles incorporation and electrodeposition were used together to prepare the La‐conversion coatings on α‐brass surface in a basal solution containing rare earth salt. The results showed that both techniques can improve the protective properties of coatings. A ‘critical nano‐La~2~O~3~ content’ and a ‘critical deposition potential’ were observed, under which the conversion coatings had the highest protective properties. Increased electrodeposition time improve the quality of conversion coatings. The La‐conversion coatings could provide important protection against α‐brass corrosion for considerable immersion periods in 3.5 wt% sodium chloride solution because it ennobled the corrosion potential and decreased the anodic current.