Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (32권3호 444-446)

A STUDY ON COPPER DEPOSITION PROCESS DURING ANODIC OXIDATION OF ALUMINIUM ALLOY


Koh, I.S.;Han, S.H.;Shin, D.H.;


Department of Metal & Material Science Engineering, Hanyang University;Cleaner Production Centre, Korea Instituteof Industrial Technology;

Abstract

The structure and composition of anodic films, formed on 6063 commercial aluminium alloy at constant current density of $1.5A/^dm2$ with various superimposed cathodic current ratio, in the range 0~33%, in the 11% $H_2SO_4$ with various concentration of $CuSO_4{cdot}5H_2O$, in the range 0~75 g/l, without cathodic current are generally porous-type and no sign of Cu co-deposition appearance, suggesting that cathodic current is an important factor in the Cu co-deposition. Comparison with the anodic film thickness measurement results obtained from anodic film formed by direct anodic current and anodic film formed by superimposed various portion of cathodic current, the portion of cathodic current of input current increases with decrease of anodic film thickness and increases with increase of concentration of $Cu_2S{;}and{;}Cu_2O$ in the anodic film.

Keywords

Anodic oxidation;Copper deposition;Aluminum alloy;Cathodic current;Anodic current;