The influence of CeO₂ on the corrosion resistance of laser remelted alloy spray coatings on steel

The results obtained form the four solutions indicate: 1. (1) The addition of rare earth (8% CeO₂) can improve the corrosion resistance of the laser-remelted M₈₀X₂₀ alloy layer remarkably, resulting in an obvious decrease of the values of ip and i'p, and hence significant improvement of passivation. 2. (2) The addition of rare earth (8% CeO₂) lowers the corrosion rate (The corrosion rate is reduced to approximatly one-third of that without rare earth) of the laser -remelted M₈₀X₂₀ alloy coating and also changes the corrosion morphology.