A coating liquid for forming an insulation coating for grain-oriented electrical steel sheets, which contains boric acid and hydrated silicate particles containing aluminum, a method for producing a grain-oriented electrical steel sheet comprising applying the coating liquid to a grain-oriented electrical steel sheet after final annealing, and then performing a baking treatment, and a grain-oriented electrical steel sheet.

Hexavalent chromium-free slurry formulations which are suitable in the production of inorganic overlay coating systems are described. The formulations provide superior hot corrosion and high-temperature oxidation protection for superalloy substrates. A basecoat slurry and topcoat slurry are provided. The basecoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:P higher than about 1:3 with the incorporation of pigments of either metallic particles, or metal oxide particles, or both in combination. The topcoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:P higher than about 1:3. An inorganic overlay coating formed on substrate made from the slurry formulation of present invention for hot corrosion protection on superalloy substrate against hot corrosion. Furthermore, a multilayer coating comprises a metallic bond coat and an inorganic overlay coating formed on superalloy substrate to further enhance high-temperature oxidation and hot corrosion protection.

A method of making a security mesh comprises forming on a conductive substrate an alumina film having through-holes in which metal, e.g., copper, through-wires are formed. First surface wires are formed on one surface of the alumina film and second surface wires are formed on the second, opposite surface of the alumina film in order to connect selected through-wires into a continuous undulating electrical circuit embedded within the alumina film. The security mesh product comprises an alumina film having a continuous undulating electrical circuit comprising copper or other conductive metal extending therethrough. A stacked security mesh comprises two or more of the mesh products being stacked one above the other.

A method for anti-corrosion treatment of components produced from aluminium, comprising a pre-treatment stage and subsequent painting. The pre-treatment stage includes steps of pickling and passivation wherein passivation of the components includes contacting them with an acidic, aqueous composition based on water-soluble compounds of the elements Zr and/or Ti. The pickling and passivation are coordinated with each other so that a re-dosing of active components of the passivation solution can occur in substantial parts from the pickling solution.

A method for anti-corrosion treatment of components produced from aluminium, comprising a pre-treatment stage and subsequent painting. The pre-treatment stage includes steps of pickling and passivation wherein passivation of the components includes contacting them with an acidic, aqueous composition based on water-soluble compounds of the elements Zr and/or Ti. The pickling and passivation are coordinated with each other so that a re-dosing of active components of the passivation solution can occur in substantial parts from the pickling solution.

Disclosed is a phosphate coating, comprising: a phosphate portion, wherein the phosphate portion comprises pores, wherein the pores are at least partially filled with a corrosion inhibition sealant, wherein the corrosion inhibition sealant comprises: a base, wherein the base comprises a matrix and a metal within the matrix, wherein the metal within the matrix comprises aluminum, an aluminum alloy, zinc, a zinc alloy, magnesium, a magnesium alloy, or a combination thereof and an inhibitor mixed within the base, wherein the inhibitor comprises zinc molybdate, magnesium metasilicate, trivalent chromium, tungstenate, a metal phosphate silicate, or a combination thereof.

Disclosed is a phosphate coating, comprising: a phosphate portion, wherein the phosphate portion comprises pores, wherein the pores are at least partially filled with a corrosion inhibition sealant, wherein the corrosion inhibition sealant comprises: a base, wherein the base comprises a matrix and a metal within the matrix, wherein the metal within the matrix comprises aluminum, an aluminum alloy, zinc, a zinc alloy, magnesium, a magnesium alloy, or a combination thereof and an inhibitor mixed within the base, wherein the inhibitor comprises zinc molybdate, magnesium metasilicate, trivalent chromium, tungstenate, a metal phosphate silicate, or a combination thereof.

Processes for the anti-corrosion pre-treatment of a plurality of components in series, in which each component in the series at least partly has surfaces of zinc and/or iron and at least parts of these surfaces are firstly activated in a targeted manner for subsequent zinc phosphating are provided with targeted activation achieved by means of controlled dispensing of an aqueous dispersion to wet zinc and/or iron surfaces, thus ensuring resource-saving activation; the aqueous dispersion for activation wetting contains a particulate constituent dispersed in water, which is at least partially composed of hopeite, phosphophyllite, scholzite and/or hureaulite and provided as a dispersion of these crystalline solids, stabilized by at least one polymeric organic compound; followed by a zinc phosphating bath comprising a quantity of an aqueous dispersion, in particular the same aqueous dispersion that is used for activation wetting.

Processes for the anti-corrosion pre-treatment of a plurality of components in series, in which each component in the series at least partly has surfaces of zinc and/or iron and at least parts of these surfaces are firstly activated in a targeted manner for subsequent zinc phosphating are provided with targeted activation achieved by means of controlled dispensing of an aqueous dispersion to wet zinc and/or iron surfaces, thus ensuring resource-saving activation; the aqueous dispersion for activation wetting contains a particulate constituent dispersed in water, which is at least partially composed of hopeite, phosphophyllite, scholzite and/or hureaulite and provided as a dispersion of these crystalline solids, stabilized by at least one polymeric organic compound; followed by a zinc phosphating bath comprising a quantity of an aqueous dispersion, in particular the same aqueous dispersion that is used for activation wetting.

A steel strip having excellent workability and corrosion resistance that requires no oil coating, and a manufacturing method therefor. The steel strip comprises a substrate and a phosphatization layer and a stearate lubricant layer provided on the substrate. The upper surface of the steel strip sequentially comprises, from inside to outside, the phosphatization layer and the stearate lubricant layer, with a surface roughness R.sub.a in the range of 0.6 to 1.8 m and R.sub.z in the range of 6 to 16 m, providing good surface lubricity during extension process. The lower surface of the steel strip has the stearate lubricant layer with a surface roughness R.sub.a of 0.3 m or less and R.sub.z of 2 m or less, offering good lubricity and high surface cleanliness. By using the steel strip designed with differentiated functionality on two surfaces according to the present invention can be directly stamped to process high-precision and large-deformation shell parts, eliminating the traditional processes of coating, oiling, and cleaning after forming required for manufacturing the high-precision and large-deformation shell parts from conventional steel plates, significantly improving the efficiency of parts manufacturing. Additionally, the steel strip has good rust resistance and corrosion resistance, and the surfaces thereof require no oil-coating treatment during storage and transportation.