Military Type III Anodizing: The Optimal Limit Within Hardening Process of Aluminium Alloy in a Near Zero Temperature

DOI

10.2991/aer.k.210810.024How to use a DOI?

Keywords

Al6061, Hard Anodizing, Aluminium Anodic Oxide (AAO), Micro Vickers Hardness

Abstract

Hard anodization was a method that can enhance aluminium alloy surface characteristics by growing an aluminum anodic oxide (AAO) film on it surface. This method was very applicable to obtain a thick and hard coating. This process was carried out at galvanostatic-potentiostatic mode at high current densities (j = 4.2 A/dm2), high target voltages (Vt = 30–60 V) and low electrolyte temperature. Two sulfuric acid electrolyte was compared, the first solution was sulfuric acid 11% vol., the second one was sulfuric acid 11% vol. plus oxalic acid 1% wt, both of them was conditioned at <5°C. The maximum AAO film thickness and hardness obtained was 110.01 µm and 400 HV. The increasment of target voltage was directly proportional to the increase in thickness and hardness of the AAO film. The results of this study could be synergized with the manufacturing process of aluminum alloy-based (Al6061) components at the product finishing stage. The logarithmic regression in the function of target voltage could be used to estimate film thickness and hardness of the films.

Copyright

© 2021, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Ndaru Adyono
AU  - W D Lestari
AU  - Luluk Endahwati
PY  - 2021
DA  - 2021/08/11
TI  - Military Type III Anodizing: The Optimal Limit Within Hardening Process of Aluminium Alloy in a Near Zero Temperature
BT  - Proceedings of the 2nd Borobudur International Symposium on Science and Technology (BIS-STE 2020)
PB  - Atlantis Press
SP  - 148
EP  - 153
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.210810.024
DO  - 10.2991/aer.k.210810.024
ID  - Adyono2021
ER  -