Chemical agent for forming solid lubrication coating film, method for manufacturing chemical agent, method for applying chemical agent, oil country tubular goods, and threaded joint for oil country tubular goods

A chemical agent for forming a solid lubrication coating film on a metal surface, the chemical agent comprising:

• as main components,
• a solid lubricant;
• a binder resin;
• and a solvent,
• wherein the solvent contains water as a main component and a lower alcohol having three or fewer carbon atoms which is added as an additive to the water, and the additive has a volume of 0.5 or more and 45 or less in terms of 100 set as a volume of the water-containing solvent,
• wherein 95% or more of a volume of the solvent is composed of the water and the additive,
• wherein, as the solid lubricant, a soap component containing at least a metal soap from metal soap and alkaline soap components is contained, and the metal soap component accounts for 95% or more of a sum of total weights of the metal soap and alkaline soap components,
• wherein a condition that a particle size of the metal soap does not exceed a film thickness of the solid lubrication coating film is set, and
• wherein the binder resin is composed of a water-soluble or water-dispersible polymer and a copolymer, and a polymer having an acrylate or methacrylate structure and the copolymer account for 90% or more of a total weight of the binder resin.