Composite Cu-LaFeO

A. Masi, S. Frangini, L. Della Seta, S.J. McPhail, D. Pumiglia, M. Carlini

Research output: Contribution to conferencePaper

Abstract

A molten carbonate dip-coating passivation method has been applied in this work to produce novel copper-LaFeO3 perovskite composite conversion coatings on a commercial 18Cr ferritic stainless steel. The passivation treatment promotes the formation of a multi-layer conversion coating consisting of a dense perovskite layer grown onto a spinel oxide sublayer and characterized by the presence of copper metal particles embedded in the perovskite grains. A relation between copper addition to the molten salt bath and optimal conversion conditions is observed, with higher copper concentration resulting in accelerated passivation kinetics. When exposed to short-term oxidation experiments in air at 700°C, the perovskite layer exhibits remarkable stability, while copper gets oxidized and diffuses in the spinel sublayer. The coating is found also to act as efficient barrier to the outward diffusion of chromium, being the chromium largely confined to the steel-coating interface.
Original languageEnglish
DOIs
Publication statusPublished - 2017
EventOxide Films: A Symposium in Honor of Masahiro Seo - PRiME 2016/230th ECS Meeting - Honolulu, United States
Duration: 1 Jan 2017 → …

Conference

ConferenceOxide Films: A Symposium in Honor of Masahiro Seo - PRiME 2016/230th ECS Meeting
CountryUnited States
CityHonolulu
Period1/1/17 → …

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Masi, A., Frangini, S., Della Seta, L., McPhail, S. J., Pumiglia, D., & Carlini, M. (2017). Composite Cu-LaFeO. Paper presented at Oxide Films: A Symposium in Honor of Masahiro Seo - PRiME 2016/230th ECS Meeting, Honolulu, United States. https://doi.org/10.1149/07527.0077ecst