Formation of Fine Metal Particles with Etching Pits by Barrel Anodic Etching

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This research aims to develop porous aluminum particles with controlled etching pits using barrel anodic etching.
Aluminum particles were subjected to anodic etching in a rotating barrel.
Etching pits on the particle surface were controlled by adjusting current and etching time.
Adding surfactants to the electrolytic solution enabled etching of particles smaller than 5 μm.
Etching pits were successfully formed, with control over their structure based on etching parameters.
Barrel anodic etching was adaptable for porous magnesium particles using magnesium as starting material.
The resulting porous particles show promise for applications in sensors, catalysts, and batteries.

Demonstrates surface modification using anodic etching in aluminum particles, indicating potential applications.

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Takashi Yanagishita (2026) studied this question.

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