Abstract
Ion implantation has shown beneficial effects in the field of wear and oxidation. This paper is a study of the influence of ion implantation on the corrosion performance of a 12% chromium ferritic steel, 3CR12. 80 keV ions were implanted at concentrations of 5 × 10 12 to 1 × 10 17 ions cm −2. The effect of implantation of 4 ion types (Mo, V, Ph, N) each at 4 dosages was studied potentiostatically in 1 N H 2SO 4 and 0.1 N NaCl solutions. Uniform corrosion loss calculations would imply that the effect of implantation is not long lasting in 1 N H 2SO 4. This could imply that changes in the potentiostatic curves are brought about by ions in solution. Pb-Implanted 3CR12 showed increased pitting resistance with increasing dosage, whereas Pb-implanted 3CR12 showed poorer pitting resistance. Mo and V implantation showed similar behaviour for the lower doses in that both species enhanced pitting resistance but the results showed poorer pitting resistance for the higher doses. The most important limitation of ion implantation is the shallow depth of penetration and whether or not implantation effects last over sufficent periods of time for practical application is still in question.
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