Version 1
: Received: 15 April 2024 / Approved: 15 April 2024 / Online: 15 April 2024 (13:22:17 CEST)
How to cite:
Afsin, P.; Akyil, C.; Kazmanlı, K.; Ürgen, M. Electro-Coloring Mechanism of Aluminum Anodic Oxides in Tin Based Electrolytes. Preprints2024, 2024040979. https://doi.org/10.20944/preprints202404.0979.v1
Afsin, P.; Akyil, C.; Kazmanlı, K.; Ürgen, M. Electro-Coloring Mechanism of Aluminum Anodic Oxides in Tin Based Electrolytes. Preprints 2024, 2024040979. https://doi.org/10.20944/preprints202404.0979.v1
Afsin, P.; Akyil, C.; Kazmanlı, K.; Ürgen, M. Electro-Coloring Mechanism of Aluminum Anodic Oxides in Tin Based Electrolytes. Preprints2024, 2024040979. https://doi.org/10.20944/preprints202404.0979.v1
APA Style
Afsin, P., Akyil, C., Kazmanlı, K., & Ürgen, M. (2024). Electro-Coloring Mechanism of Aluminum Anodic Oxides in Tin Based Electrolytes. Preprints. https://doi.org/10.20944/preprints202404.0979.v1
Chicago/Turabian Style
Afsin, P., Kürşat Kazmanlı and Mustafa Ürgen. 2024 "Electro-Coloring Mechanism of Aluminum Anodic Oxides in Tin Based Electrolytes" Preprints. https://doi.org/10.20944/preprints202404.0979.v1
Abstract
A method for accurately determining the chemical composition of deposits at the bottom of pores during the electrocoloring (e-coloring) of aluminum anodic oxide (AAO) layers in tin-based solutions is developed. The aluminum samples were AC e-colored after DC sulfuric anodization. Free-standing, tin e-colored aluminum oxide film was obtained by selective dissolution of the metallic aluminum from the AAO in copper chloride solution to access the deposit directly at the bottom of the pore. This allowed us to take XPS analysis directly from the deposits at pore bottoms without any interference from the base material or insulating barrier layer. The results revealed the presence of a mixture of tin oxide and metal in the deposits, which were richer in oxide content. Furthermore, a cyclic voltammetry experiment mimicking real polarization conditions during AC conditions was optimized and used to gain a deeper understanding of the electrochemical reactions that occur during AC electrocoloring. The comparison of CV results in tin-free and tin-containing electrolytes indicated that the tin deposited during a cathodic cycle is oxidized in the anodic cycle. The formation of tin based deposits radically changed the CV behavior. The XPS and cyclic voltammetry results consistently show that the deposits formed during e-coloring comprised a mixture of metallic and oxidic tin species richer in oxide content.
Keywords
Aluminum; anodization; electrocoloring; tin; XPS:
Subject
Chemistry and Materials Science, Electrochemistry
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
