A method for improving deposit control and cleanliness performance in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil comprises a lubricating oil base stock as a major component, and a mixture of (i) at least one dispersant, and (ii) at least one viscosity modifier, as minor components. The at least one dispersant and the at least one viscosity modifier are present in an amount sufficient to have a critical dispersant thickening ratio of greater than 0.33. The critical dispersant thickening ratio is determined in accordance with the formula:

[00001]$\frac{{\left[G_n\right]}^{*}.Math.\mathrm{dV}.Math.\text{/}.Math.d\left[G_n\right]}{{\left[B_m\right]}^{*}.Math.\mathrm{dV}.Math.\text{/}.Math.d\left[B_m\right]}$

wherein [G.sub.n] is the weight percent of each of n dispersants in the formulated oil, [B.sub.m] is the weight percent of each of m viscosity modifiers in the formulated oil, dV/d[G.sub.n] is the kinematic viscosity (Kv.sub.100) increase of the lubricating oil per the weight percent of each of n dispersants in the formulated oil, and dV/d[B.sub.m] is the kinematic viscosity (Kv.sub.100) increase of the lubricating oil per the weight percent of each of m viscosity modifiers in the formulated oil.

Provided is a an additive or composition for imparting lubricity which has high lubricity, is excellent in low-corrosion property, low-temperature fluidity, thermal conductivity, thermal stability, and oxidative stability, and has high flashing point. The lubricant according to the present invention is an additive or composition, wherein the following components (A) an amine or an ammonium compound; and (B) an acid or a salt thereof, have been added therein, wherein at least one of the components (A) and (B) contains a hydrogen-bonding functional group.

Provided is a an additive or composition for imparting lubricity which has high lubricity, is excellent in low-corrosion property, low-temperature fluidity, thermal conductivity, thermal stability, and oxidative stability, and has high flashing point. The lubricant according to the present invention is an additive or composition, wherein the following components (A) an amine or an ammonium compound; and (B) an acid or a salt thereof, have been added therein, wherein at least one of the components (A) and (B) contains a hydrogen-bonding functional group.

The present invention relates to novel uses of corrosion inhibitors in fuels and lubricants.

The present invention relates to novel uses of corrosion inhibitors in fuels and lubricants.

Provided is a water-based lubricating coating agent for a metal material, capable of carrying out a chemical conversion treatment and a lubrication treatment at the same time, which makes it possible to achieve excellent lubricity even in plastic working, press molding, and the like, and at the same time, operability (e.g., process shortening, sludge reduction).

The water-based lubricating coating agent having pH of 2.0 to 6.5 for a metal material is obtained by blending: at least one lubricating component other than black-based solid lubricants; and at least one chemical conversion component selected from the group consisting of a phosphoric acid compound, an oxalic acid compound, a molybdic acid compound, a zirconium compound, and a titanium compound, the concentration of the lubricating component is 5 mass % or more in mass ratio to the total solid content mass in the lubricating coating agent, and the concentration of the chemical conversion component is 0.3 to 8 mass % when the total mass of the lubricating coating agent is regarded as 100 mass %.

Provided is a water-based lubricating coating agent for a metal material, capable of carrying out a chemical conversion treatment and a lubrication treatment at the same time, which makes it possible to achieve excellent lubricity even in plastic working, press molding, and the like, and at the same time, operability (e.g., process shortening, sludge reduction).

The water-based lubricating coating agent having pH of 2.0 to 6.5 for a metal material is obtained by blending: at least one lubricating component other than black-based solid lubricants; and at least one chemical conversion component selected from the group consisting of a phosphoric acid compound, an oxalic acid compound, a molybdic acid compound, a zirconium compound, and a titanium compound, the concentration of the lubricating component is 5 mass % or more in mass ratio to the total solid content mass in the lubricating coating agent, and the concentration of the chemical conversion component is 0.3 to 8 mass % when the total mass of the lubricating coating agent is regarded as 100 mass %.

The lubricating oil composition of the present invention contains a base oil, a 2,6-di-tert-butylphenol (A), and at least one compound (B) selected from a benzotriazole compound and a sorbitan compound.

The lubricating oil composition of the present invention contains a base oil, a 2,6-di-tert-butylphenol (A), and at least one compound (B) selected from a benzotriazole compound and a sorbitan compound.

The invention comprises synergistic compositions of at least two metal carboxylates as corrosion inhibitors based on polycarboxylate anions and a variety of different cations. The inhibitors are designed to be added to film forming or other compositions to reduce the corrosion of the metal substrate on which the synergistic compositions are applied.