2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 11: Recycling & Environmental
| Editors: | Kongoli F, Havlik T, Pagnanelli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 410 pages |
| ISBN: | 978-1-987820-34-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Evaluation of TEOS (Tetraethyl Orthosilicate) Coating Electrodeposited on Low-Carbon Steel
Vitor Bonamigo Moreira1; alvaro meneguzzi1; Andrea Moura Bernardes1;1UFRGS, Porto Alegre, Brazil;
Type of Paper: Regular
Id Paper: 209
Topic: 7
Abstract:
The environmental cost of chromate based surface treatments over metal, due to the toxicity of Cr+6 ions, stimulates the search for equally efficient and environmentally friendly alternatives. In this context, silane-based coatings are a promising possibility, once their efficiency as primer to painting treatment has already been proved. The most common technique used in order to obtain such coatings is currently the dip-coating on silane hydroalcoholic solution, which may result in non-homogeneous films, weakening their capacity of barrier protection against corrosion. Such difficulty can be overcome with the use of silane electrodeposition. In this study, TEOS coatings were produced by electrodeposition technique over low-carbon steel surface using different potentials, with the samples eventually receiving organic coating of acrylic resin. These electrodeposition coatings were compared to dip-coating obtained ones. Both coatings were tested comparatively by electrochemical impedance spectroscopy and polarization, accelerated corrosion and adherence tests. The coatings were also compared to conventional chromate-based and phosphate-based conventional coatings. The results show a promising technology to the achievement of efficient and environmentally friendly coatings.
Keywords:
Hydrometallurgical; Industry; Material; Metal; Sustainability; Technology; Wastes;References:
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