Stoichiometric titanium dioxide ion implantation in AISI 304 stainless steel for corrosion protection

Hartwig, A.; Decker, M.; Klein, Oliver; Karl, H.

doi:10.1016/j.nimb.2015.07.025

Cited by 4 publications

(1 citation statement)

References 28 publications

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“…This technique has been widely used to augment or introduce desirable properties in metals. More specifically, ion implantation has been shown to improve the degradation resistance of metals such as titanium, aluminium and stainless steel under various environments [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Recently, ion-implantation studies have been carried out on magnesium and magnesium-based alloys for biodegradable implant applications.…”

Section: Introductionmentioning

confidence: 99%

Ion Implantation of Calcium and Zinc in Magnesium for Biodegradable Implant Applications

Somasundaram

Ionescu

Kannan

2018

Metals

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Abstract:In this study, magnesium was implanted with calcium-ion and zinc-ion at fluences of 10 15 , 10 16 , and 10 17 ion·cm −2 , and its in vitro degradation behaviour was evaluated using electrochemical techniques in simulated body fluid (SBF). Rutherford backscattering spectrometry (RBS) revealed that the implanted ions formed layers within the passive magnesium-oxide/hydroxide layers. Electrochemical impedance spectroscopy (EIS) results demonstrated that calcium-ion implantation at a fluence of 10 15 ions·cm −2 increased the polarisation resistance by 24%, but higher fluences showed no appreciable improvement. In the case of zinc-ion implantation, increase in the fluence decreased the polarisation resistance. A fluence of 10 17 ion·cm −2 decreased the polarisation resistance by 65%, and fluences of 10 15 and 10 16 showed only marginal effect. Similarly, potentiodynamic polarisation results also suggested that low fluence of calcium-ion decreased the degradation rate by 38% and high fluence of zinc-ion increased the degradation rate by 61%. All the post-polarized ion-implanted samples and the bare metal revealed phosphate and carbonate formation. However, the improved degradative behaviour in calcium-ion implanted samples can be due to a relatively better passivation, whereas the reduction in degradation resistance in zinc-ion implanted samples can be attributed to the micro-galvanic effect.

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