A composition to cover a metal surface comprises an organic continuous phase comprising at least one anticorrosive pigment, and a hydrophilic phase dispersed in the organic continuous phase, the hydrophilic phase comprising a chemical agent for the surface treatment of the metal surface. The surface treatment chemical agent can advantageously be cerium nitrate. A process for the manufacture of a composition according to the present invention is provided.

A corrosion inhibition composition is disclosed comprising a zinc oxide, a zinc phosphate, a calcium silicate, an aluminum phosphate, a zinc calcium strontium aluminum orthophosphate silicate hydrate, a molybdate compound, a silicate compound, and a zinc phthalate compound.

A corrosion-protected electrical assembly includes a metallic component (e.g. a utility pole or a guy anchor rod or direct buried tower steel) having an outer surface, and a water-impermeable, electrically-conductive, covering applied to at least a portion of the outer surface. A covering for a metallic component includes a water-impermeable polymeric matrix, and a particulate carbonaceous material dispersed in the polymeric matrix. A method for protecting a metallic component from corrosion includes applying a covering to an outer surface of the metallic component at the bottom portion of the metallic component. The covering is water-impermeable and electrically-conductive.

A ZnAl layered double hydroxide (LDH) composition is added to a solution including a corrosion inhibitor and stirred, and a precipitate of the solution is collected, washed, and dried to form a corrosion inhibiting material (CIM), in which the LDH composition is intercalated with the corrosion inhibitor. An inorganic CIM and/or an organic CIM may be formed. The organic CIM may be added to a sol-gel composition to form an organic CIM-containing sol-gel composition, and the inorganic CIM may be added to a sol-gel composition to form an inorganic CIM-containing sol-gel composition. Further, the organic CIM-containing sol-gel composition may be applied on a substrate (e.g., an aluminum alloy substrate) to form an organic CIM-containing sol-gel layer and cured by ultraviolet (UV) radiation, the inorganic CIM-containing sol-gel composition may be applied on the substrate to form an inorganic CIM-containing sol-gel layer and cured by UV radiation, and the sol-gel layers may be thermally cured.

Corrosion to a metal surface in contact with corrosion forming components within an aqueous-based fluid system may be decreased, prevented, and/or inhibited by contacting the metal surface(s) with apatite forming components and forming at least one apatite species on the surface with the apatite forming components. The apatite forming components may be or include phosphates, organophosphates and combinations thereof. In a non-limiting embodiment, the apatite forming components may further include fluorides, chlorides, calcium, and combinations thereof.

The invention relates to a process for treating a metal alloy part, characterized in that it comprises the following steps: producing a stock formulation by mixing, in equal molar parts of silicon, an alcoholic solution of hydrolysed epoxysilane and an alcoholic solution of hydrolysed aminosilane, mixing the stock formulation with a suspension comprising conductive nanowires in an amount by weight of between 0.1% and 10% relative to the total weight of the stock formulation in order to obtain a dilute formulation, and depositing the dilute formulation on the part in order to obtain the coating.

The aqueous protective coating composition is provided for easy application to refractory linings and walls. When dried, the protective coating composition provides excellent chemical resistance to molten aluminum alkali metals and vapors. The protective coating composition includes alumina and silica, suitably provided as mullite, calcined alumina, and colloidal silica; and a metallic non-wetting agent.

Described herein is a method for treatment of a metallic surface, including the step of contacting the metallic surface with an acidic aqueous composition. Also described herein is an acidic aqueous composition used in the method for treatment, a master batch to produce such acidic aqueous composition, a method of using the acidic aqueous composition to treat metallic surfaces and substrates including the thus treated metallic surfaces.

Described herein is an improved process for anticorrosion pretreatment of a metallic surface including steel, galvanized steel, aluminum, an aluminum alloy, magnesium and/or a zinc-magnesium alloy, wherein the metallic surface is brought into contact with i) an acidic aqueous composition A which includes a1) at least one compound selected from the group consisting of titanium, zirconium and hafnium compounds, and with ii) an aqueous composition B which includes b1) at least one (meth)acrylate resin and b2) at least one phenol resin, where the metallic surface is brought into contact firstly with the composition A and then with the composition B and/or firstly with the composition B and then with the composition A and/or simultaneously with the composition A and the composition B.

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.