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Formation of a phosphate conversion coating on bioresorbable Mg-based metallic glasses and its effect on corrosion performance

Version 2 2024-06-02, 23:46
Version 1 2023-08-29, 06:26
journal contribution
posted on 2023-08-29, 06:26 authored by DM Miskovic, K Pohl, N Birbilis, KJ Laws, M Ferry
Ternary Mg-Zn-Ca metallic glasses show promise as a bioresorbable implant material. Their susceptibility to relatively rapid corrosion rates, however, requires new ways to reduce their initial rate of corrosion post-implantation. To this end, the application of a simple phosphate conversion coating was studied on Mg66Zn30Ca4 to determine the metallic glasses impact on coating development. A model for coating growth is proposed. The results demonstrate corrosion resistance can be improved by an order of magnitude in simulated body fluid, with a significant reduction in anodic kinetics. Furthermore, the mechanical reliability under a compressive load is improved two-fold, despite substrate relaxation due to coating.

History

Journal

Corrosion Science

Volume

129

Pagination

214-225

Location

Amsterdam, The Netherlands

ISSN

0010-938X

eISSN

1879-0496

Language

English

Publication classification

C1.1 Refereed article in a scholarly journal

Publisher

PERGAMON-ELSEVIER SCIENCE LTD