Chromate and Chromate–Phosphate Conversion Coatings on Aluminium

被引：0
|
作者：
M. Oki
T. K. Oki
E. Charles
机构：
[1] National Open University of Nigeria,School of Science and Technology
[2] University of Port Harcourt,Institute of Petroleum Studies
[3] Greenfield-Oaks Limited,Technical Department
[4] Niger Delta University,Department of mechanical Engineering
来源：
Arabian Journal for Science and Engineering | 2012年 / 37卷
关键词：
Chromate; Phosphate; Conversion coatings; Thin films; Aerospace; Adhesion;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Investigations of chromate and chromate–phosphate conversion coatings on aluminium using SIMS and AES techniques revealed that they are composed of hydrated chromium oxide/hydroxide and chromium phosphate respectively. These compositions are consistent with the electrochemical mechanism for conversion coating formation on aluminium. Enrichment of the outermost regions of the coatings with coating solution species suggests the gradual migration of these species under a concentration gradient towards the metal/coating interface where coating formation and growth consume such species.
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页码：59 / 64
页数：5
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