Atmospheric corrosion of iron under a single droplet

A new systematic multi-electrochemical approach

Journal article (2024)

Authors

E. Rahimi Team Arjan Mol - Mechanical, Maritime and Materials Engineering
K. Zhang Team Yaiza Gonzalez Garcia - Mechanical, Maritime and Materials Engineering
A. Kosari Team Yaiza Gonzalez Garcia - Mechanical, Maritime and Materials Engineering
N. Van den Steen Vrije Universiteit Brussel
A.M. Homborg Team Arjan Mol - Mechanical, Maritime and Materials Engineering , Netherlands Defence Academy
H.A. Terryn Vrije Universiteit Brussel
J.M.C. Mol Team Arjan Mol - Mechanical, Maritime and Materials Engineering
Y. Gonzalez Garcia Team Yaiza Gonzalez Garcia - Mechanical, Maritime and Materials Engineering
Research Group
Team Arjan Mol (Mechanical, Maritime and Materials Engineering) (TU Delft)
More Info
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Published Date

2024

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Materials Science and Engineering

Research Group

Team Arjan Mol

Abstract

Utilizing a dedicated micro-sized three-electrode cell, this study systematically investigates early-stage electrochemical properties and corrosion behavior of pure iron under single droplets. Various volumes and NaCl concentrations were considered during the evaporation-driven shape and concentration evolution of single droplets. The measurements disclosed that reducing the droplet size from 5 µL to 1.5 µL at 0.01 M NaCl concentration, increased noise resistance (Rn) and polarization resistance (Rp) values. However, at 0.1 M and 0.2 M NaCl concentrations, reducing droplet size led to the domination of relatively high chloride ion concentration over oxygen diffusion, resulting in a very low Rn and Rp and hence enhanced localized corrosion.