A titanium dioxide micro-nanocontainers, corrosion-resistant waterborne epoxy coatings and preparation method thereof, including preparation steps as follows: TiO.sub.2 micro-nano spheres are synthesized by applying hydrothermal method; a polyaniline layer doped with molybdate ions is deposited on the surface of TiO.sub.2 micro-nano spheres by adopting the method of in-situ chemical polymerization, TiO.sub.2/PANI-MoO.sub.4.sup.2? micro-nano-spheres are obtained, then, polydopamine is encapsulated on the surface of TiO.sub.2/PANI-MoO.sub.4.sup.2? micro-nano spheres to obtain titanium dioxide micro-nanocontainers; next, antirust filler, defoamer, dispersant and thickener are added into waterborne epoxy emulsion, then titanium dioxide micro-nanocontainers are added in the waterborne epoxy emulsion for dispersing and grinding, filtering and encapsulating to obtain component A; the waterborne epoxy curing agent and deionized water are mixed in proportion to obtain component B; component A is stirred, then it is mixed with the component B in proportion, corrosion-resistant waterborne epoxy coatings is obtained. According to the invention, the titanium dioxide micro-nanocontainers is synthesized and added into the coating as an additive, which can not only improve the compatibility between the filler and the emulsion, but greatly improves the long-term corrosion resistance of the coating by prolonging the release time of the corrosion inhibitors.

Provided is a bilayer composition for surface treatment of a steel plate and a surface-treated steel plate using same. The bilayer composition for surface treatment of a steel plate, comprising an undercoat coating composition including 1 to 12 wt % of a phenoxy resin, 0.001 to 1.0 wt % of colloidal silica, 0.001 to 1.0 wt % of a silane coupling agent, 0.1 to 1.0 wt % of a corrosion inhibitor, 0.001 to 1.0 wt % of a phosphoric acid compound as a long-term corrosion resistance improving agent, and a balance of water; and a topcoat coating composition including 0.1 to 5.0 wt % of an acrylic acid resin, 30 to 50 wt % of colloidal silica, 40 to 60 wt % of alkoxy silane, 5 to 15 wt % of an acrylate-based monomer, 0.01 to 1.00 wt % of an acidity control agent, and a balance of an organic solvent.

A process and system to protect an apparatus such as parts, components, equipment, vehicles and the like from environmental effects such as corrosion or rust using the oil-based VCI and a water-based film. In one aspect of the disclosure, the water-based film can be applied on top of a layer of an oil-based VCI that has been applied on an apparatus such as a vehicle (described below). In other aspects of the disclosure, the oil-based VCI is mixed in with the water-based film and then applied on top of the apparatus. In still other aspect of the disclosure, the oil-based VCI is applied on top of a layer of water-based film that has been applied to the apparatus.

A method produces a basic zinc cyanurate powder, the amount of a portion thereof which remains in a sieve having a mesh size of 1,000 m being less than 1 mass %. The method includes heating, at 30 to 300 C., a powder-form mixture which is composed of zinc oxide, cyanuric acid, and water, which has a ratio by mole of zinc oxide to cyanuric acid of 2 to 3, and which has a water content of 9 to 18 mass %, in a closed or unclosed state.

A metal surface coating composition including a high-consistency material containing a lubricant base oil and an amide compound, and a composition of a phosphorus compound containing one or more compounds represented by the below formulae and a metal, wherein the ratio (a/b) of the number of amide groups (a) and the number of acidic groups (b) is within a range of 1.1 to 6.0: ##STR00001## where X.sup.1 to X.sup.7 represent an oxygen atom or a sulfur atom, R.sup.11 to R.sup.13 represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, wherein at least one of them is a hydrocarbon group having 1 to 30 carbon atoms, and R.sup.14 to R.sup.16 represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms wherein at least one of them is a hydrocarbon group having 1 to 30 carbon atoms.

A coating system may be configured to be applied to an aluminum-magnesium substrate of an object. The coating system may include a primer configured to reduce the corrosion rate of the aluminum-magnesium substrate and a topcoat configured to resist water and improve solar reflectance of the coating system. The primer may include a silicate and a first additive configured to increase corrosion resistance of the coating system The topcoat may include a siloxane and a second additive configured to reduce solar absorptance of the coating system.

The invention relates to a method for producing a pigment paste and an electrocoat containing the paste, the past being made by mixing solid pigment particles with a grind resin in the presence of water and/or an organic liquid, wherein the grind resin includes a dispersion of core-shell particles in an epoxide prepolymer which is liquid at 20 C. and the core-shell particles have a silicone core and a polymer shell.

The present disclosure provides sol-gels, sol-gel films and substrates, such as vehicle components, having a sol-gel film disposed thereon. At least one sol-gel is the reaction product of an organosilane, a metal alkoxide, an acid stabilizer, and an organic solvent, the sol-gel having about 10 wt % or less water content based on the total weight of the sol-gel. At least one vehicle component comprises a sol-gel coating system, comprising a metal substrate and a sol-gel disposed on the metal substrate, and the sol-gel is the reaction product of an organosilane, a metal alkoxide, an acid stabilizer, and an organic solvent, the sol-gel having about 10 wt % or less water content based on the total weight of the sol-gel.

Corrosion-inhibiting coating materials comprise a sol-gel and a corrosion-inhibiting compound with at least one disulfide group. The corrosion-inhibiting compound is contained within the sol-gel. Coated and/or laminated structures may include the corrosion-inhibiting coating materials on a metal substrate, and may include a secondary layer (e.g., a paint, etc.) adhered to the coating material opposite the metal substrate. Methods of forming a corrosion-inhibiting sol-gel comprise mixing organo-metallic compounds and the corrosion-inhibiting compound into a sol solution and incubating (e.g., reacting) the sol solution to form the corrosion-inhibiting sol-gel with the corrosion-inhibiting compound contained within the sol-gel. Generally, corrosion-inhibiting coating materials are hexavalent chromium free.

Disclosed are curable coating compositions, and methods of cathodic corrosion protection using the compositions. For example, a curable coating composition comprising a mixed salt of magnesium thiodialkanoate, and a method for applying the coating composition, which when applied onto a steel or other ferrous substrate provides an anticorrosive coating, effective for improving resistance to cathodic disbondment.