Using alternative current (A.C)‎ for anodizing process

Abstract EN

Using Alternative Current (A.

C) technique in anodizing process, two electrodes of anodizing cell were anodized, anode and cathode electrodes at the same experiment for two materials, pure aluminum (1000) & aluminum-magnesium alloy (5052) respectively in Sulfuric Acid solution as an electrolyte.

The present work includes study of four essential effective variables that were considered as the most dominant variable in anodizing process.

The range of these variables are : alternative current density (A.C) from (2-3) Amp / dm2, electrolyte concentration from (2-6) Normality, electrolyte temperature from (15-25) C˚ and anodizing time from (20-60) minutes.

The experimental work was designed according to (Box-Wilson) method by using second order polynomial model between four variables and thickness of anodic layer for the two types of materials and substituted the experimental results for anodizing process in proposed model to calculate the coefficients of the mathematical equations to find optimization equation for obtaining maximum film thickness.

The calculated optimization values for pure aluminum (1000) was to be : (3) Amp / dm2, (2) Normality, (25) C˚, (60) minute, and for aluminum-magnesium alloy (5052) was to be : (3) Amp / dm2, (2) Normality, (25) Centigrade, (60) minute.

Practical schematic diagrams for the above different variables with coating thickness are applied to Illustrate the effect of these variables on anodizing process by using Alternative Current (A.

C) technique.