New experimental approach for intelligent screening of buried metal/oxide/polymer interfaces via local electrochemistry: Example of undamaged model epoxy-coated Zn alloys
نویسندگان
چکیده
A new simple experimental approach is proposed for in situ mechanistic studies of the underpaint stability metal/oxide/polymer interface under immersion. It allows an intelligent screening and fast ranking conversion coatings on Zn alloys designed further application organic coatings. The based a electrochemical aging protocol to samples preliminary coated with model epoxy-polymer. latter enough thin allow local impedance measurement stable this protocol, as revealed by attenuated total reflectance infrared spectroscopy (ATR-IR) (EIS). degradation modes characterization accessed via combined EIS, mapping (LEIS LEIM) optical imaging. developed allowed discriminate two alloy substrates, one intact another slightly damaged Cr(III) layer, which no strong differences behavior or average surface composition was visible prior epoxy-polymer application. relative substrates coating, evaluated test, correlated observations obtained same thick commercial epoxy primer after 1000 h methodology offers possibility rapid various formulations Cr(III)-based treatments paint applications.
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ژورنال
عنوان ژورنال: Electrochimica Acta
سال: 2021
ISSN: ['1873-3859', '0013-4686']
DOI: https://doi.org/10.1016/j.electacta.2020.137411