| 摘要 |
PROBLEM TO BE SOLVED: To provide a rust-preventive oil composition which can suppress occurrence of rust over a long period of time even without passing through a cleaning stage for removing the rust occurrence factors, in the case when rust occurrence factors are stuck to various parts after metal working such as a steel sheet, a bearing, a steel ball and a guide rail, and metal parts subjected to assembling with bare hands.SOLUTION: The rust-preventive oil composition contains both a nonionic surfactant having a hydrophilic-lipophilic index of 10 to 12 and at least one rust inhibitor, the content of the nonionic surfactant being 0.1 to 10 mass% on the basis of the total of the composition, and the rust inhibitor being selected from among sarcosine-type compound, sulfonate, ester, amine, carboxylic acid, fatty acid amine salt, carboxylate, paraffin wax, oxidized wax salt, alkyl-or alkenyl-succinic acid derivative, and boron compounds. Kinematic viscosity is 1 to 50 mm/s at 40°C. |
