Size‐Dependent Corrosion of Al‐Fe Intermetallic Particles at Al‐Mg Alloy Surfaces Investigated by In‐Liquid Nanoscale Potential Measurement Technique

Corrosion of Al alloy often starts from the nanoscale corrosion around the surface‐exposed Al‐Fe intermetallic particles (IMPs) and leads to a serious damage limiting its application range in the automobile industry. To solve this issue, understanding of the nanoscale corrosion mechanism around the...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2023-12, Vol.19 (50), p.e2207859-n/a
Main Authors: Hirata, Kaito, Okamoto, Takahiro, Kitagawa, Takuya, Tomitori, Masahiko, Ozawa, Takahiro, Fukuma, Takeshi
Format: Article
Language:English
Subjects:
Al alloy
Alloys
Aluminum base alloys
atomic force microscopy
Corrosion mechanisms
Corrosion potential
Corrosion resistance
Corrosion resistant alloys
Corrosion tests
Damage
intermetallic particles
in‐liquid potential measurement
Iron
local corrosion cells
Magnesium
Measurement techniques
Nanotechnology
open‐loop electric potential microscopy
Sulfuric acid
Weight loss
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Summary:Corrosion of Al alloy often starts from the nanoscale corrosion around the surface‐exposed Al‐Fe intermetallic particles (IMPs) and leads to a serious damage limiting its application range in the automobile industry. To solve this issue, understanding of the nanoscale corrosion mechanism around the IMP is essential, yet it is impeded by the difficulties in directly visualizing nanoscale distribution of reaction activity. Here, this difficulty is overcomed by open‐loop electric potential microscopy (OL‐EPM) and investigate nanoscale corrosion behavior around the IMPs in H2SO4 solution. The OL‐EPM results reveal that the corrosion around a small IMP settles down in a short time (
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.202207859