Method for forming coating film and lubricating oil composition
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsAkihiko Yano, Hiroaki Takeuchi, Shuichi Isayama, Risako Koba
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Abstract
A method for forming a coating film on a sliding surface of a sliding member includes: a first contact step of supplying a lubricant composition containing tungsten disulfide to the sliding surface to bring the tungsten disulfide into contact with the sliding surface; and a second contact step of bringing a silane compound that is dialkoxysilane, trialkoxysilane, tetraalkoxysilane, or a polymer or a copolymer of dialkoxysilane, trialkoxysilane, and tetraalkoxysilane into contact with the sliding surface.
Claims2
A method for forming a coating film on a sliding surface of a sliding member, the method comprising:
- a first contact step of supplying a lubricant composition containing tungsten disulfide to the sliding surface to bring the tungsten disulfide into contact with the sliding surface;
- and
- a second contact step of bringing a silane compound that is dialkoxysilane, trialkoxysilane, tetraalkoxysilane, or a polymer or a copolymer of dialkoxysilane, trialkoxysilane, and tetraalkoxysilane into contact with the sliding surface,
- wherein
- the lubricant composition does not contain the silane compound, and
- the second contact step is executed after the first contact step.
A lubricant composition comprising:
- a lubricating base oil;
- tungsten disulfide;
- and
- a silane compound that is dialkoxysilane, trialkoxysilane, tetraalkoxysilane, or a polymer or a copolymer thereof,
- wherein a concentration of the tungsten disulfide in the lubricant composition is 0.01 to 5 mass %, and a mass ratio of the silane compound to the tungsten disulfide is 0.3 to 0.5.
Dependencies are inferred from the claim text.