Preparation and corrosion resistance of electroless Ni-P/SiC functionally gradient coatings on AZ91D magnesium alloy

- Ni-P/SiC gradient coatings were successfully prepared on AZ91D magnesium alloy.
- Kinetic model for deposition rate of Ni-P/SiC plating is established.
- Corrosion behavior of the Ni-P/SiC gradient coatings is studied.
- The factors affecting corrosion resistance of the gradient coatings are analyzed.