Abstract: Five kinds of Ni-based alloy coatings with 0, 2.5%, 5%, 7.5% and 10% Mo were prepared on the surface of 45CrNi steel plates by using CO₂ laser cladding equipment.The weight losses of corrosive wear in 3.5%NaCl solution of NiCrBSiMo laser cladded coatings were tested with a ball-on-disc wear tester.By means of tests and calculations, the weight loss of corrosion, wear and the components of interaction during corrosive wear tests were analyzed quantitatively.The results show that the total weight loss induced by corrosive wear is composed of the weight loss induced by simple wear and interaction.At the same time, the weight loss induced by interaction occupies about 24%~56% in the total weight loss.Whereas, the weight loss induced by simple corrosion can be neglected.Moreover, the weight loss of coatings induced by wear under corrosive wear is 1.3~2.3 times compared to that of simple wear and the increased weight loss of wear induced by corrosion which occupies more than 99% in the total weight loss induced by interaction.The weight loss of coatings induced by corrosion under corrosive wear is 1.4~2.7 times compared to that of corrosion in the pure condition and both of values are small.