Abstract
In the present paper, the wasted oil with the saltwater droplet was prepared to simulate the corrosion behaviors of M50 steel in the salt fog condition. The comprehensive characterization of the local corrosion area on the surface of M50 displays the corrosion behaviors of M50 steel in saltwater-contaminated lubricating oil. The experimental results show that the surface of M50 steel has two types of local corrosion area morphology: pit-like corrosion spots and isolated outer regions, which are found after immersion in saltwater-contaminated lubricating oil. The larger the outer area, the larger the inner area and the probability of occurrence becomes high. The local corrosion areas have an inward depression and an outward protrusion, and the formation mechanisms are galvanic corrosion and uniform corrosion. These finding are helpful to understand the corrosion problems and mechanisms of roller bearings exposed in salt fog contaminated lubricating oil.
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