| abstract |
PROBLEM TO BE SOLVED: To seal a water-resistant grease composition capable of suppressing occurrence of white structure peeling and corrosion and maintaining good lubrication for a long time even when moisture is mixed, and the water-resistant grease composition It provides a rolling bearing for a steel rolling mill that is excellent in water resistance. SOLUTION: A base oil comprising at least one lubricating oil selected from mineral oil and synthetic oil, having a kinematic viscosity at 40 ° C. of 70 to 250 mm 2 / s, and a calcium sulfonate complex as a thickener, As a rusting agent, at least one selected from a carboxylic acid-based rust-preventing additive, a carboxylate-based rust-preventing additive and an ester-based rust-preventing additive is added at a ratio of 0.1 to 20% by mass of the total amount of grease. A water-resistant grease composition, and a rolling bearing for a steel rolling mill in which the water-resistant grease composition is enclosed. [Selection] Figure 1 |