In-situ monitoring of the electrochemical corrosion behavior in fluoride environment of cellular structured Ti6Al4V alloy fabricated by electron beam melting

Abstract

The variation of electrochemical corrosion behavior with pore depth in porous Ti6Al4V alloys produced by electron beam melting (EBM) was studied in situ by a unique simulation model in acidic solution containing fluoride (PBS-H-F). The results suggested that steady-state pitting occurred at shallow pore depth position, while the sample at deep pore depth position exhibited superior corrosion resistance. The degree of corrosion on the surface was decreased with the increase in pore depth, including susceptibility to pitting, a behavior attributed to the concentration gradient of fluoride ions inside the pores.