Analysis on the Anodic Oxide Film of Aluminum Pistons Formed in High Current Density and Wide Temperature Range
A process in anodic oxidation with high current density and wide temperature range was researched for high speed forming film on the top surface of aluminum piston. The oxidation parameters is a concentration of 18% H2SO4 solution-based liquid, current density of 5.5～8A/dm2, temperature range－5～20°С , the oxidation time for the 0～60min. Pulse power and cooling equipment co-work to produce the film thickness up to 107μm, film speed was about 1.78μm / min. SEM indicates that the porous layer was made of the regular array columnar “cells” which parallel arrange and grow perpendicular to substrate.
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
J. J. An "Analysis on the Anodic Oxide Film of Aluminum Pistons Formed in High Current Density and Wide Temperature Range", Advanced Materials Research, Vols. 189-193, pp. 507-511, 2011