| abstract |
Treatment agent to form a protective coating, comprising: a) 10-99% by mass of sodium and potassium silicates with SiO2 / M2O molar ratios of 2 to 4. where M represents at least Na or K - with respect to the total mass of alkaline silicate and lubricating component, b) 1-90% by mass of at least one lubricating component chosen from oils, soaps, metallic soaps, waxes and polytetrafluoroethylene, with respect to the total mass of alkaline silicate and lubricating component, c) 2-30% by mass of at least one viscosity modifier chosen among thickeners based on organic polymers and inorganic thickeners, with respect to the total mass of alkaline silicate and lubricating component, d) water |