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Potentiodynamic and electrochemical impedance spectroscopy analysis of hybrid metallic systems in 1 M HCl

Year: 2025

Type: article

Abstract: This study evaluates the corrosion performance of hybrid aluminium components comprising built and substrate regions. The hybrid system, developed via additive and subtractive methods, was divided to separate individual parts for microstructural and electrochemical analysis in 1 M HCl using Open Circuit Potential (OCP), Electrochemical Impedance Spectroscopy (EIS), Potentiodynamic Polarization (PDP), and Chronoamperometry were used to assess corrosion kinetics, passive film stability, and time-dependent degradation. Scanning Electron Microscopy (SEM) with Energy Dispersive Spectroscopy (EDS) was used to characterize surface morphology before and after corrosion, identifying phase distribution and localized corrosion. The results pinpoint the electrochemical differences between two hybrid configurations - Sample E (Al 7 built on 6082 substrate) and Sample F (Al 10 built on 6082 substrate), with one typical configuration (Sample E) exhibiting superior corrosion resistance across both its built and substrate regions due to a more stable passive layer and refined microstructure.

Source: Springer Link (Chiba Institute of Technology)

DOI: 10.1051/matecconf/202541711004/pdf

Authors: Samson Dare Oguntuyi, Mandlenkosi G.R. Mahlobo, Femi J. Akinfolarin, Ngeleshi M. Kibambe, Kasongo Nyembwe, Peter M. Mashinini, Peter Olubambi

Institutions: University of Johannesburg, University of South Africa, Cape Peninsula University of Technology

Language: English

Topic: Corrosion Behavior and Inhibition

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: University of Johannesburg

OpenAlex ID: W7110830604

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