Corrosion Behavior of Ni–Mo Coatings Prepared by Different Electrodeposition Methods in Na2S Solution

To enhance the corrosion resistance of pure aluminum in sulfur-containing environments, Ni–Mo coatings were deposited on aluminum substrates via direct current (DC) and pulse current (PC) electrodeposition techniques. The phase structure, micromorphology and element composition of the coatings were characterized by XRD, SEM, and EDS. The corrosion resistance of pure aluminum and Ni–Mo coatings in 1 wt