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Template-free, microscale dimple patterning of pure titanium surface through anodic dissolution using non-aqueous ethylene glycol-TiCl4 electrolytes

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posted on 2020-12-04, 16:28 authored by Jing Wang, Carmen TorresCarmen Torres, James Borgman, Lorenzo Zani, Paul ConwayPaul Conway
We report a single-step anodic dissolution route for the template-free patterning of pure titanium (Ti) surfaces into a microscale, dimpled topography using non-aqueous ethylene glycol-TiCl4 electrolytes. Anodic dissolution of Ti metal (i.e. 0.04 M Ti4+) into a 40 EG: 1 TiCl4 electrolyte was found to induce a predominant change in the anodic dissolution reaction of Ti metal, converting its surface morphology from a slightly-pitted, bright finish into a dimple-patterned surface. The dimple pattern, ca. 4.5 µm in size and 1 µm in cusp height, was found self-organised with no apparent relation to underlying metal grain structure and independent of the applied potential within the anodic current plateau. The origin of the dimple patterning is surmised to arise from a dynamic self-organisation of the double layer, templated via tracery anodic reaction products – Ti-glycolate-derived, stacked-nanolayers (SNLs).

Funding

Embedded Integrated Intelligent Systems for Manufacturing

Engineering and Physical Sciences Research Council

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History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Surface and Coatings Technology

Volume

404

Publisher

Elsevier

Version

  • VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Acceptance date

2020-10-22

Publication date

2020-10-27

Copyright date

2020

ISSN

0257-8972

Language

  • en

Depositor

Dr Carmen Torres-Sanchez. Deposit date: 23 October 2020

Article number

126555

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