A waterbase coating composition for use in protecting the threads of metal studs during automotive production line phosphating, electrostatic painting and welding. Composition also provides controlled lubricity as well as even torque during the tightening sequency of fasteners by robotics.

In a rust preventing wax treatment method which is applicable to automobile bodies already provided with a finish coat of paint, use is made of a wax which possesses not only thixotropy but also such a temperature-sensitive property that the viscosity of the wax decreases when heated and increases again when cooled near to room temperature. In the wax treatment method the wax and/or the article to be treated with the wax is heated and the wax, which is kept under action of a mechanical force to utilize its thixotropy, is applied to desired surfaces of the article. After that the waxed article is cooled near to room temperature. By this method the wax exhibits a very low viscosity when applied to the article and therefore can penetrate even into narrow spaces, and the applied wax soon solidifies as the waxed article is cooled. Therefore, a wax coating film of a sufficient thickness can be formed without suffering from dripping of the applied wax.

In the particular embodiments described in the specification, low-corrosion hot melt ink contains 0.5% to 10% by weight of a metallo-organic compound such as overbased calcium sulphonate, basic barium sulphonate and overbased sulphurized calcium alkyl phenate as a corrosion inhibitor. Such inks produce no significant corrosion of printing system components after extended exposure at elevated temperatures.

Water reducible coating compositions comprising: an oxidized slack wax, paraffin wax or petrolatum; a low molecular weight polyethylene, polybutene, or polypropylene; naphthenic or paraffinic oil; a salt of a sulfonic acid, a nitrate, a nitrite, a borate or an amine soap of a fatty acid; a mixture of mineral spirits and ethylene glycol monopropyl ether; an unsaturated fatty acid (preferably oleic acid) and a fugitive amine (preferably 2-amino-2-methyl-1-propanol); and water are disclosed which provides improved corrosion resistant coatings for ferrous alloys.

A method of preparing an amine-free emulsion of alkaline earth metal sulfonates is disclosed. A solution of water and a nonionic, associative thickener of the type normally used for viscosity and thixotropy modification of latex compounds is combined with an overbased or neutral earth metal sulfonate or sulfonate complex to produce the emulsion. Mixtures of these emulsified products with other ingredients such as neutral diluent oils, linear alcohol/hydrocarbon mixtures, tall oil fatty acids, non-ionic surfactants, oxidized polyethylene waxes, small levels of microcrystalline wax, petrolatums, and/or calcium salts of oxidized petrolatums is also disclosed. The resulting emulsions find application in the modification of asphalt emulsions, the formulation of temporary coatings for the protection of painted automotive surfaces (transit coatings for automobiles) and in the prevention of corrosion of metal surfaces.