Abstract
Thermal spraying of corrosion- resistant coatings of titanium and tantalum is difficult; dense coatings are not produced, and oxidation of these metals increases coating porosity. In this study, oxidation during plasma spraying was reduced with a shrouding system. Porosity and oxide content also were minimized by optimizing the spraying parameters. After optimization, the coatings still had open porosity and thus were incapable of protecting the substrate material against corrosion in water solutions containing 3 % NaCl. Therefore, posttreatments for improvement of corrosion resistance were studied. Electron beam fusion produced corrosion resistance equal to or better than that of bulk commercial samples of titanium and tantalum.
Similar content being viewed by others
References
H.-D. Steffens, E. Erturk, and K.-H. Busse, Vacuum Plasma Spraying of Titanium,J. Vac. Sci. Technol., Vol A3 (No. 6), Nov/Dec 1985, p 2459–2463
S.L. Chen, P. Siitonen, and P. Kettunen, Experimental Design and Optimization of Plasma Sprayed Coatings,Plasma Spraying: Theory and Applications, R. Suryanarayanan, Ed., World Scientific Publications, Singapore, 1993, p 95–120
E. Lugscheider, H. Eschnauer, B. Häuser, and D. Jäger, Vacuum Plasma Spraying of Tantalum and Niobium,J. Vac. Sci. Technol., Vol A3 (No. 6), Nov/Dec 1985, p 2469–2474
H. Gruner and A.R. Nicoll, Process Quality Control during Vacuum Plasma Spraying with Oxygen Sensitive Materials,Proc. UK Corrosion 1984, Vol 1, Institution of Corrosion Science and Technology and Corrosion Control Engineering (ICST) Birmingham, 12-14 Nov 1984, p 29–35
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kinos, T., Chen, S.L., Siitonen, P. et al. Densification of plasma-sprayed titanium and tantalum coatings. JTST 5, 439–444 (1996). https://doi.org/10.1007/BF02645274
Issue Date:
DOI: https://doi.org/10.1007/BF02645274