Estudo do processo de anodização

Abstract

Anodizing is an electrolytic process which creates an oxide layer in the surface of certain metals. When aluminum is anodized, a layer composed of Al2O3 (alumina) forms on its surface which protects the bulk metal from further corrosion. This layer is an electric insulating and has high hardness. The purpose of this work aimed the theoretical and operational study of the anodizing process in aluminum. The process followed six basic steps: emulsion cleaning, neutralization, brightening, anodizing, coloring and sealing. The hickness of the layer formed was analyzed by Optical Microscopy and Scanning Electronic Microscopy (SEM). The parameters attributed to the anodizing in this work obtained a layer with approximately 8 µm thickness. This thickness is classified into the production of consumer goods which provides special finish and additional protection against corrosion.