Microstructure and properties of mechanical attrition enhanced electroless Ni–P plating on magnesium alloy

Mechanical attrition has been applied to improve the electroless plating process on a magnesium alloy. The results indicated that an alloyed layer forms at the interface of Ni–P coating and magnesium alloy. The Ni–P coating becomes smooth, compact, has refined grains and is free of cracks and pores. The phase of the Ni–P coating transformed from amorphous to crystalline. Consequently, the coating adhesion, hardness and corrosion resistance have been improved significantly.