期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
卷号：3
期号：6
页码：13869
出版社：S&S Publications
摘要：Anodizing is an electrolytic oxidation process. Good amount of work has been carried out in variouselectrolytes using direct current (DC). Anodizing may be regarded as the artificial thickening of the thin (1–5 nm)native oxide film that is always present on aluminum exposed to the atmosphere. In this investigation, a porous oxidecoating has been formed on aluminum by using alternating current (AC) anodizing under a current density range of 1–5A/dm2 and temperature of 15–350C in sulfuric acid electrolyte containing sodium sulfate. There is an increasing trendon the coating ratio up to 3 A/dm2. Anodizing time has some effect both on coating ratio and on anodic film thickness.Similarly, temperature of the electrolyte greatly affects both thickness and coating ratio. Increasing electrolytetemperature decreases both thickness and coating ratio. Addition of sodium lauryl sulfate (SLS) to the AC anodizingelectrolyte improves the coating ratio even up to the current density of 5 A/dm2. When compared with plain bathaddition of gelatin along with SLS improves the finish of the anodic coating as well as coating ratio. In AC anodizing,gelatin slightly improves the finish of the anodic coating; moreover, due to its inhibiting action on the surface gelatinreduces the dissolution of anodic coating thereby slightly improves both thickness and coating ratio compared withplain bath.
关键词：ac anodizing; anodic coating ratio; aluminum oxide; SLS and gelatin additive to aluminum anodizing
