A method for increasing corrosion resistance of metallic substrates without use of hexavalent chromium includes chemically treating the substrate to create an oxide layer, mixing graphene nanoplatelets into a non-chromate epoxy-based primer, applying the primer to the oxide layer of the substrate, and applying a topcoat to the primer opposite the oxide layer.

A method for increasing corrosion resistance of metallic substrates without use of hexavalent chromium includes chemically treating the substrate to create an oxide layer, mixing nanoclay particles into a non-chromate primer, applying the primer to the oxide layer of the substrate, and applying a topcoat to the primer opposite the oxide layer.

Disclosed is a solution composition which may be used for a single-bath electrochemical passivation and a method using the same. The solution composition includes a metal cation, a metal-oxide anion; and an organic ligand, and optionally includes a non-metallic oxide anion or a polymer. The solution composition may prevent undesired precipitation of metal oxides before performing passivation. In addition, the method of passivation using the solution composition in a single-bath use is also provided.

An aqueous coating composition contains (A) an emulsion polymer comprising, based on the weight of the emulsion polymer, from 5% to 28% by weight of structural units of a cycloalkyl (meth) acrylate, from 0.05% to 10% by weight of structural units of a phosphorous acid monomer, a salt thereof, or mixtures thereof, from zero to 10% by weight of an additional ethylenically unsaturated acid monomer, a salt thereof, or mixture thereof, and structural units of an additional monoethylenically unsaturated nonionic monomer; (B) a specific amount of an aliphatic carboxylic acid of formula (I) HOOCR.sub.1COOH, (II) R.sub.2COOH or combinations thereof, a salt thereof, or mixtures thereof; and (C) from 2.6% to 10% by weight of an anticorrosive pigment, based on the weight of the aqueous coating composition.

Polymeric gel (e.g., a polymeric gel pack) may be used for protection of a pipeline against damage due to environmental factors such as corrosion. For example, a method of using a polymeric gel for pipeline corrosion mitigation may include: applying a polymeric gel pack including a polymeric gel to a pipeline, wherein a first precursor fluid and a second precursor fluid react to form the polymeric gel, and wherein the polymeric gel pack at least partially surrounds the pipeline.

A system for applying a first, a second, and a third coating composition. The system includes a first high transfer efficiency applicator defining a first nozzle orifice. The system further includes a second high transfer efficiency applicator defining a second nozzle orifice. The system further includes a third high transfer efficiency applicator defining a third nozzle orifice. The system further includes a substrate defining a target area. The first, the second, and the third high transfer efficiency applicators are configured to expel the first coating composition through the first nozzle orifice to the target area of the substrate, through the second nozzle orifice to the target area of the substrate, and through the third nozzle orifice to the target area of the substrate.

A waterborne coating composition which includes a film-forming binder and composite particles comprising wax and a metal oxide, such as wax encapsulated zinc oxide, provides enhanced mildew resistance.

A method for suppressing corrosion under insulation includes a step of applying a paste containing aerogel particles and a liquid medium to a target surface to form a coating film. A paste for suppressing corrosion under insulation contains aerogel particles and a liquid medium.

A method of making a silver-silicalite coating on a surface of a stainless-steel substrate is provided. The method includes mixing metakaolin with an aqueous solution of NaOH to form a first mixture. The method further includes mixing silica gel and silver nitrate with the first mixture to form a second mixture. Furthermore, the method includes mixing Zeolites Socony Mobil-5 (ZSM-5) with the second mixture to form a third mixture. The method further includes hydrothermally treating the stainless-steel substrate with the third mixture to form the silver-silicalite coating on the surface of the stainless-steel substrate. The hydrothermal treatment is carried out in the absence of an organic template. The stainless-steel substrate coated with the silver-silicalite coating, prepared by the method of the present disclosure, has lower corrosion in comparison to the same stainless-steel substrate without the silver-silicalite coating.

A protective coating formed on a reaction chamber wall comprises a base layer comprising an oxide represented by a chemical formula of A.sub.xB.sub.yO.sub.z, wherein A is a metal element, B is a metal or semiconductor element different from A, O is oxygen and each of x, y and z is >0. The protective coating is configured such that upon exposure to a fluorine (F)-containing reactant, at least a portion of the base layer reacts with the fluorine F-containing reactant and is converted to a F-containing region comprising a solid fluoride of the A.