Effects of competitive anion adsorption (Br− or Cl−) and semiconducting properties of the passive films on the corrosion behavior of the additively manufactured Ti–6Al–4V alloys
By Seo, Dong-Il; Lee, Jae-Bong
Published in Corrosion Science
2020
Abstract
Herein, the corrosion behavior of the additively manufactured (AM) Ti–6Al–4V is investigated based on the relation between the pitting potentials and equilibrium adsorption of the Br− and Cl− anions using potentiodynamic polarization curves, Mott–Schottky plots, and the Langmuir isotherm model. The Mott–Schottky plots are measured using the microdroplet cell technique based on the capacitance of the passive films on each dark and bright AM Ti–6Al–4V grain. The pitting potential can be attributed to the doping densities as well as α′ phase distribution and predicted using the equilibrium adsorption coefficient of Br− and Cl−.