A composition based on a certain chromium-free silicate-based binder is described. The composition is an aqueous solution of lithium-doped potassium silicate in combination with an aluminum or aluminum alloy powder, zinc powder or a combination thereof. The coatings of the present invention are capable of achieving a full cure at temperatures as low as 350-450 degrees F. by the inclusion of a colloidal solution of a nano-sized ceria, thus making the coatings especially suitable for application on temperature sensitive base materials.

Disclosed is a paint composition containing graphene oxide for preventing corrosion of a structure and improving water repellency, corrosion proof and long-term durability of a concrete structure. The paint composition includes a powder mixture containing 0.2 to 1.0 weight % of zinc (Zn), 0.02 to 0.3 weight % of graphene oxide, 0.06 to 0.11 weight % of phosphorus, and a remaining amount of aluminum (Al); and an adhesive resin in which the powder mixture is uniformly dispersed.

Composition and process for preparing corrosion-resistant passive coatings on bulk-aluminum alloys and aluminum powder-pigments; said coatings derived from an acidic aqueous composition consisting essentially of potassium hexafluorozirconate, basic chromium sulfate and potassium tetrafluoroborate.

A multilayer coating obtained by carrying out the steps of (1) applying a ZnNi layer to a substrate material, in particular to a steel; (2) carrying out a first heat treatment in a temperature range from 135-300 C., preferably from 185-220 C., for a time period of at least 4 hours, preferentially of at least 23 hours; (3) applying a metal-pigmented top coat to the ZnNi layer; and (4) carrying out a second heat treatment in a temperature range from 150-250 C., preferably from 180-200 C., for a time period of at least 10 minutes, prefer-ably of at least 20 minutes, preferentially of at least 30 minutes.

A solid surface comprises (i) from 45 to 80 volume fraction percent of polymethylmethacrylate or unsaturated polyester or a combination of both, (ii) from 25 to 55 volume fraction percent of inorganic filler particles distributed evenly throughout the solid surface, and (iii) from 0.75 to 8 volume fraction percent of a siloxane fluid, wherein, when the filler has a major dimension of from 30-50 micrometers, the siloxane has a molecular weight of from 40,000 to 150,000 or when the filler has a major dimension of from 10-15 micrometers, the siloxane has a molecular weight of from 25,000 to 100,000 or when or when the filler has a major dimension of from 1-10 micrometers, the siloxane has a molecular weight of from 5,000 to 100,000.

Novel slurry formulations and processes for forming improved protective coatings used in the hot section components of gas turbine engines are provided. The process includes a unique two-step deposition methodology whereby the required concentration of reactive element within an improved reactive element doped aluminide coating can be consistently produced in a reproducible manner.

A metallic pigment preparation that is composed of a metallic pigment, and a passivating agent and a neutralizing agent. The preparation can be provided in a non-dusting form, particularly in the shape of the pellet. The preparation can be easily stirred into aqueous or solvent-based liquid formulations. The preparation can also be used in natural rubber or synthetic latex.

Novel multilayer aqueous slurries and coatings for hot corrosion protection of substrates are provided that exhibit improved resistance to type II hot corrosion while also being hexavalent chromium free. The compositions represent a notable departure and performance improvement from conventional coating systems utilized for hot corrosion protection.

The invention relates to a coating system, more particularly a corrosion control coating system, for generating cathodic corrosion protection on a metallic substrate, comprising at least two layers, and also to a method for producing it and to a substrate coated with the coating system.

The invention relates to a coating system, more particularly a corrosion control coating system, for generating cathodic corrosion protection on a metallic substrate, comprising at least two layers, and also to a method for producing it and to a substrate coated with the coating system.