Effect of Plasma Sprayed Alumina Coating on Corrosion Resistance | ||||
| International Conference on Aerospace Sciences and Aviation Technology | ||||
| Article 91, Volume 13, AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT- 13, May 26 – 28, 2009, May 2009, Page 1-10 PDF (1.02 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/asat.2009.23859 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| N. Hegazy1; M. Shoeib2; Sh. Abdel-Samea3; H. Abdel-Kader4 | ||||
| 1Ministry of Military Production - Factory 18 (main author). | ||||
| 2Metallurgical Research Center-Tiben. | ||||
| 3Ministry of Military Production -Factory 270. | ||||
| 4Prof. Faculty of Engineering- Helwan-Helwan University. | ||||
| Abstract | ||||
| Plasma sprayed alumina coatings on the surface of metals change greatly the corrosion law of metals in strong acid solutions and enhance effectively their corrosion resistance property. In this study, the plasma spray process was employed on substrate of AISI 304 stainless steel with deposition of AL2O3 ceramic coatings with and without Ni- 5%AL as bond layer. In order to enhance the corrosion resistance, a post-treatment has been carried out using polyester sealant. The porosity of the coating was measured by optical methods before and after sealing. The effectiveness of the type of coatings, bond layer, and sealing treatment on the corrosion behavior of the coatings were determined through static immersion test in 5%HCL. High corrosion resistance was obtained in the sealed condition where minimum porosity was occurred. | ||||
| Keywords | ||||
| Plasma spray; AL2O3 ceramic coating; sealing; Bond coat; Corrosion | ||||
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