| abstract |
【Task】 Provided are a rust-proof grease composition that exhibits excellent rust prevention properties without using nitrites, and a bearing in which the rust-proof grease composition is enclosed. [Solution] A grease composition comprising a base oil and a thickener and a rust inhibitor component, wherein the rust inhibitor component is a polybasic acid metal salt, a polyhydric alcohol in which a part of hydroxyl groups are blocked, and an organic sulfone. An essential component of at least one compound selected from acid salts or fatty acid esters, and 0.1 to 10 parts by weight of each of the base oil and the thickener, and the base oil is a synthetic hydrocarbon. Containing at least one oil selected from oils and ether oils, wherein the thickener is a urea-based thickener and is blended in an amount of 5 to 30 parts by weight based on the total amount of the base oil and thickener. The grease-enclosed bearing has the above-mentioned anti-rust grease composition sealed in the sliding portion. [Selection] Figure 1 |