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.

Described herein is a method for treatment of a metallic surface, including the step of (A) contacting the metallic surface with a first aqueous composition, and a subsequent step of (B) contacting the metallic surface subsequent to step (A) with a second aqueous composition. Also described herein is a kit-of-parts including the first and second aqueous composition and a kit-of-parts including master-batches of the first and second aqueous compostions. Also described is a method of using the kit-of-parts for treating a metallic surface and substrates including the thus treated metallic surfaces.

The present invention relates to a coating system for protecting a substrate comprising at least one layer A and at least one layer B, wherein said layer A is made of a material selected from the group consisting of pyrolytic graphite, pyrolytic boron nitride, compressed expanded graphite, hot-pressed turbostratic boron nitride, compressed graphene flakes, compressed hexagonal boron nitride flakes, graphitized graphene oxide flakes or a combination thereof; and said layer B is made of a composite comprising a polymeric matrix and 2D flakes, said 2D flakes being made of a material selected from the group consisting of graphene, graphene oxides, reduced graphene oxide, heteroatom-doped graphene, hexagonal boron nitride, metal chalcogenides, metal oxides, metal chalcogenide halides, metal halides, phosphotrichalcogenides, MXenes, metal carbides, metal nitrides, layered hydroxides, alkaline-earth metal silicides, alkaline-earth metal bromides, alkaline-earth metal germanides and alkaline-earth metal stannides, layered peroskivtes, phosphorene, silicene, antimonene, germanene, boronene, stanene, bismuthene and combination thereof. It further relates to a coated substrate comprising a substrate and the coating system.

The present invention concerns anti-corrosive coating compositions, in particular coating compositions for protecting iron and steel structures. In particular, the present invention relates to silicate-based coating compositions comprising particulate zinc, conductive pigments, and glass hollow microspheres. The invention furthermore concerns a kit of parts containing the composition, a method for its application, as well as metal structures coated with the composition.

To provide a non-chromate surface treatment agent that, without using one or two or more iron group compounds selected from oxides, hydroxides, or oxyhydroxides of iron, nickel, or cobalt, or the like, allows a surface treatment coating having excellent adhesion to an aluminum material or the like and an upper layer film and providing excellent corrosion resistance to the aluminum material or the like to be formed between the aluminum material or the like and the upper layer film, a method for forming a surface treatment coating using the surface treatment agent, and an aluminum material or an aluminum alloy material having thereon the surface treatment coating. The above challenge can be solved by a surface treatment agent that contains a water-soluble or water-dispersible organic polymer (A) containing a carbonyl group and/or hydroxyl group in a unit structure and an organic polymer (B) containing a phosphonic group.

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.

A method of fabricating a hydrophobic coating on a surface of a solid substrate which includes a layer-integrable material includes the steps of depositing a deformable layer of the layer-integrable material onto the surface of the solid substrate, forcibly embedding a plurality of particles within the deformable layer, and solidifying the deformable layer including the plurality of particles so as to be integral with the surface of the solid substrate. At least a portion of the plurality of particles is embedded at a threshold depth within the deformable layer prior to solidification.

A metal surface coating composition and a terminal-fitted electric wire which is anti-corrosion treated with the composition are provided. The composition includes a high-consistency material containing a lubricant base oil and an amide compound, a composition of a phosphorus compound containing one or more compounds represented by the below formulae and a metal, and a nucleating agent: ##STR00001## where X.sup.1 to X.sup.7 each represent an oxygen atom or a sulfur atom, R.sup.11 to R.sup.13 each represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, among which at least one is a hydrocarbon group having 1 to 30 carbon atoms, and R.sup.14 to R.sup.16 each represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms among which at least one is a hydrocarbon group having 1 to 30 carbon atoms.