Destruction of coating material during spark anodizing of titanium

被引：46

作者：

Matykina, E. ^{[1
]}

Doucet, G. ^{[1
]}

Monfort, E. ^{[1
]}

Berkani, A. ^{[1
]}

Skeldon, P. ^{[1
]}

Thompson, G. E. ^{[1
]}

机构：

[1] Univ Manchester, Ctr Corros & Protect, Sch Mat, Manchester M60 1QD, Lancs, England

来源：

ELECTROCHIMICA ACTA | 2006年 / 51卷 / 22期

基金：

英国工程与自然科学研究理事会;

关键词：

titanium; anodizing; dielectric breakdown;

D O I：

10.1016/j.electacta.2006.01.021

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 [应用化学];

摘要：

An investigation has been carried out, using a sequential anodizing procedure, of the loss of coating species to the electrolyte during spark anodizing of titanium. Anodic coatings were formed galvanostatically in alkaline silicate electrolyte and then further thickened by re-anodizing in alkaline phosphate electrolyte. In addition to examination of coating compositions and morphologies following different times of anodizing in each electrolyte, solution analyses for silicon and titanium were carried out subsequent to anodizing in the phosphate electrolyte. Significant amounts of both elements were detected, indicative of destruction of the coating at sites of dielectric breakdown in the phosphate electrolyte. The lost coating material is replaced by formation of phosphorus-rich material at the breakdown sites, as evident from elemental mapping of coatings. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：4709 / 4715

页数：7

共 12 条

[1]

Preparation of microarc oxidation layer containing hydroxyapatite crystals on Ti6Al4V by hydrothermal synthesis [J].