Phosphate Conversion Coating on Diecast AZ91D and Its Corrosion Resistance
Authors:
- 15 July 2005
- journal article
- Published by Trans Tech Publications, Ltd. in Materials Science Forum
- Vol. 488-489, 819-822
Abstract
A phosphate conversion coating was deposited on diecast AZ91D magnesium alloys, the film was a complex phosphate containing Mg and Al,which showed amorphous structure. Corrosion resistance of conversion coating in 3.5%NaCl was investigated by polarization curve. It was showed that the anodic branch of polarization curve for the phosphate conversion coating presented typical passivation characteristic. Immersion test results showed that the corrosion rate of phosphate conversion coating was less than that of chromate Dow7 film.Keywords
This publication has 2 references indexed in Scilit:
- Structure and Corrosion Behavior of Conversion Coatings on Magnesium AlloysMaterials Science Forum, 2000
- A phosphate-permanganate conversion coating for magnesiumMetal Finishing, 1995