Fretting corrosion response of boride coated titanium in Ringer's solution for bio-implant use: Elucidation of degradation mechanism

Add time:07/29/2019    Source:sciencedirect.com

Fretting corrosion of boride coated commercially pure titanium (CpTi) is investigated in Ringer's solution using open circuit potential (OCP) method. Coating is synthesized at 850, 910 and 1050 °C for 1, 3 and 5 h. Upon fretting, borided specimens exhibited lower galvanic coupling than bare and correspondingly the wear loss. TiB2+TiB and/or TiB2 thickness plays a significant role in determining the fretting resistances. Passivation/repassivation is attributed by TiO2/B2O3 and TiO2 formations in borided and bare CpTi respectively. Study revealed that suppression of summation of synergistic and corrosion components improved the fretting performance of coated CpTi. Boriding of CpTi has enhanced the biocompatibility response.

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