|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Environmental Degradation of Additively Manufactured Alloys
||Corrosion and Protection (Conversion Coating and Plasma Electrolytic Oxidation) of Ti6Al4V Processed by Powder Bed Fusion – Additive Manufacturing Electrochemical and EIS Study
||Joseph Hazan, Menachem Bamberger
|On-Site Speaker (Planned)
Green conversion coatings has been developed using oxyanion like permanganate additive (a conversion layer former) to (H2SO4).
An anodic oxide film by anodization (plasma electrolytic oxidation) has been also performed.
The structure obtained for these two protective coatings consists of an outer (porous) layer, observed at high frequencies and an inner (barrier) layer at low frequencies in the impedance diagram. An electrical equivalent circuit describing the coated alloy is proposed.
Electrochemical corrosion results in the corroding electrolyte (NaCl 3%) of Ti6Al4V will be presented and compared to that of a rolled (Ti-0.15 % Pd) foil.
Finally, semi conductive properties of the passive film formed on the additive manufactured titanium alloy have been investigated. Mott-Schottky plots (CSC-2 vs. E) have been drawn and the donor concentration ND and the flat band potential EFB have been determined from the linear part and interpreted as regards passivation of the Ti alloy.
||Planned: Supplemental Proceedings volume