Enhancement of the Pitting Corrosion Resistance of AISI 316LVM Steel with Ta-Hf-C/Au Bilayers for Biomedical Applications

Table 3

Corrosion parameters obtained from the Tafel analyses for the 316LVM stainless steel substrate, the gold layer, and the Ta-Hf-C/Au bilayers.

Sample	(nA/cm^2)	(mV versus Ag/AgCl)	Corrosion rate (⋅10^−3 mm/yr)
316LVM	840.7	−180.0	22.37
Au	40.4	−53.0	1.07
HfC/Au	130.0	7.32	3.47
TaC/Au	462.0	−84.6	12.30
30TaC-70HfC/Au	417.0	−30.9	11.10
70TaC-30HfC/Au	176.0	−17.1	4.69