Abstract:The corrosion behaviors of SUS316L stainless steel, Co-Cr alloy and Ti-6Al-4V alloy in Ringer's, PBS(-) and Hank's solutions have been investigated. The results indicate that the corrosion of Ringer's solution is the strongest, then followed by PBS(-) and Hank's solution. The presence of  HPO₄^2- , H₂PO^-₄, SO₄^2- and glucose in the PBS(-)and Hank's solution probably reduces the corrosion inhibitor and corrosion current. The decrease of the solution's pH significantly increases the corrosion rate and susceptibility to localized corrosion of SUS316L SS and Co-Cr alloy. However, Ti-6Al-4V alloy exhibits an exceptional stability and has only a slight increase of corrosion rate with decreasing pH.

Key words: simulated body fluids; biomedical material; corrosion; corrosion inhibition