Direct Electroless Deposition of Ni-P-Zn Films on AZ91D Mg Alloy.

Magnesium alloys are known to have excellent physical and mechanical properties suitable for a number of industrial and technological applications. The propensity of Mg to form galvanic couples limits further industrial acceptance. This paper examines the conditions for the electroless deposition of ternary nickel-phosphorous-zinc [Ni-P-Zn] alloy films on AZ91D Mg alloys comparing the deposition with similar deposits on more traditional surfaces. The stable, aqueous, alkaline solutions used in this study do not require any pre-treatment specific to the deposition and are able to produce continuous coatings containing Zn up to around 24 wt% of the total cladding. [ABSTRACT FROM AUTHOR]