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Probing Localised Corrosion Inhibition of AA2024-T3 by Integrating Electrode Array, SVET, SECM, and SEM-EDS Techniques

Version 2 2024-06-03, 01:25
Version 1 2023-11-09, 04:21
journal contribution
posted on 2024-06-03, 01:25 authored by Reza ParviziReza Parvizi, AE Hughes, Maria ForsythMaria Forsyth, Mike Yongjun TanMike Yongjun Tan
This work demonstrates an approach towards the understanding of multi-scale and open-circuit localised electrochemical processes of AA2024-T3 in the presence and absence of an environmentally friendly rare-earth inhibitor; cerium diphenyl phosphate (Ce(dpp)3). At high temporal resolution, a wire bean electrode (WBE) made from 100 identical AA2024-T3 wires revealed sudden increases in galvanic anodic and cathodic activities immediately after dosing of 50 and 100 ppm of the inhibitor and an overall suppression of macro-scale activities by increasing the inhibitor concentration to 200 ppm, suggesting it as a fast-screening tool for inhibitors and measuring inhibition efficiency. At high spatial resolutions, scanning probe electrochemical techniques confirmed local activation of corroding microstructures on individual AA2024-T3 wires similarly by dosing the inhibitor up to 100 ppm. In agreement with WBE findings, the effective shutdown of both anodic and cathodic activities occurred after increasing the inhibitor concentration to 200 ppm confirming the optimal concentration of the Ce(dpp)3 and the mixed mode inhibition mechanism of this selected inhibitor on AA2024-T3.

History

Journal

Metals

Volume

13

Pagination

1-21

Location

Basel, Switzerland

ISSN

2075-4701

eISSN

2075-4701

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Issue

10

Publisher

MDPI

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