Influence of electroless plating on the deterioration of the corrosion resistance of MAO coated AZ31B magnesium alloy

SEM surface images of the coatings after different treatments: (a) as-prepared MAO, (b) MAO with activation, (c) MAO with activation/Ni-P (2 min), (d) MAO without activation/Ni-P (40 min), (e) MAO with activation/Ni-P (40 min), and (f) cross-section microstructure of (e).279