Surface treatment of magnesium alloys has become a hot research point in the field of magnesium alloys science,in which phosphating was a main aspect.In this paper,a typical phosphating coating were successfully prepared on AZ91D magnesium alloys,and the microstructure and the anticorrosion property of the coatings was ana- lyzed.The results showed that there were obvious difference between the phosphating coatings,and the corrosion re- sistane performance of the coatings had a close relationship with the e...