The Effect of Ion Implantation on the Corrosion Behaviour of Fe
Previous work2 indicated that the corrosion and passivation behaviour of metals such as Al, Cu and Fe can be influenced by high doses of various low energy ions. This paper presents further investigations of the Fe system mainly following implantation with Cr and Ar but also with Fe and Ta. Cathodic reduction tests show that ion implanted Fe has an oxide layer of approximately 608, a thickness twice that of a normal air formed oxide. The film formed consists of both Fe304 and γ-Fe2O3, as in air formed films and the extra oxide thickness is contributed by the Fe3O4 ayer with the outer 7-Fe2O3 layer remaining constant. Potentiostatic polarisation tests on Cr implanted Fe showed a large increase in sample passivity. In order to assess the quality of the steels produced, ion implanted Cr/Fe surface alloys were compared to conventional alloys of similar bulk composition. Unconventional alloys formed by implantation of Ta were also investigated by potentiostatic polarisation measurements.
KeywordsOxide Film Corrosion Behaviour Critical Current Density Conventional Alloy Potentiostatic Polarisation
Unable to display preview. Download preview PDF.
- 1.Ion Implantation in Semiconductors. J W Mayer, L Eriksson and J A Davies. Academic Press (1970).Google Scholar
- 2.Ion Implantation in Semiconductors and Other Materials, Edited by B L Crowder. Plenum Press (1973).Google Scholar
- 3.Application of Ion Beams to Metal. Edited by S T Picraux, E P Eernisse and P L Vook. Plenum Press (1974).Google Scholar
- 4.F L Laque and H R Cobson. Corrosion Resistance of Metals and Alloys. Reinhold (1963).Google Scholar
- 5.O Kubaschewski and B E Hopkins. Oxidation of Metals and Alloys. Butterworth (1962).Google Scholar