The present invention relates to a kind of pigment preparation, in particular to a modified layered silicate novel barrier and shielding pigment and its preparation method. It is a layer silicate with exchangeable anticorrosive ions as a template, using metal oxides or metal salts, inorganic acids to synthesize nano-spherical zinc phosphate, phosphate, molybdate, borate or tungstate, with rare earth cerium, strontium, lanthanum or praseodymium doped modification of the pigment. The invention uses silicate as a template to effectively control the agglomeration of nanoparticles during the liquid phase deposition process, avoiding the multiple cleaning and sewage treatment processes required by using surfactants and solvents. What is more valuable is lamellar silicic acid. The salt itself has certain anti-corrosion properties and is economical. At the same time, the physical barrier and exchangeable anti-corrosion ions of the lamellae further improve the anti-corrosion properties of the pigment, making the pigment highly active and shielding.

A coated steel sheet comprises: a steel sheet; a primer coating film which is arranged on the steel sheet and comprises an anti-corrosive pigment and an aggregate composed of primary particles; and a top coating film which is arranged on the primer coating film. The anti-corrosive pigment comprises at least one compound selected from the group consisting of a bivalent tin salt, a trivalent vanadium salt, a tetravalent vanadium salt, a tetravalent molybdenum salt, an oxycarboxylic acid salt, an ascorbic acid, a phosphorous acid salt and a hypophosphorous acid salt.

Disclosed are corrosion resistant compositions and processes for the preparation thereof that involve the application of a plurality of layers comprised of at least one tetraalkoxysilane and at least one functionalized silane layer to a supporting substrate.

This invention relates to galvanic aluminum alloy powder-pigments coated with semi-conducting corrosion-inhibiting compositions and particularly to the process for preparing said coated powder-pigments for coating substrates to inhibit corrosion. The coated aluminum alloy powder-pigments are electrically active and prevent corrosion of metals which are more cathodic (electropositive) than the coated-aluminum alloy pigments.

An intumescent fire-retardant and anti-corrosive coating modified by polyaniline-silicon carbide and a preparation method thereof are provided, the coating includes a compound A and a compound B. The compound A includes a waterborne epoxy resin emulsion, polyaniline-silicon carbide composite material, fire-retardant filler, titanium dioxide, aluminum hydroxide, talc powder, a wetting dispersant, a defoaming agent, a flow agent and water, the compound B includes an epoxy hardener. The polyaniline-silicon carbide composite material is prepared from silicon carbide, phenylamine, protonic acid and an oxidizing agent through an ice bath. The polyaniline-silicon carbide composite material can enhance dispersion in the emulsion through the organic-inorganic composite, and silicon carbide has high thermal stability and good density, while polyaniline serves as a material with unique fire-retardant properties. The synergy between the two effectively enhances the fire resistance and anti-corrosion performance of the coating, strengthens the strength of the intumescent layer, and solves existing problems.

This invention relates to a protection coating composition, which comprises a) at least one resin, the resin being selected from a group consisting of polyurethane resin (A), polyurethane-acrylic resin(B), b) a solvent, c) a bi-functional epoxy resin precursor (C), the bi-functional epoxy resin precursor (C) being represented by the following formulas: R.sub.1Y[CH.sub.2CH(OH)R.sub.3CH(OH)CH.sub.2XR.sub.4X].sub.nR.sub.2. This invention also provides a method for treating metallic surface by using the protection coating composition, an article which has at least one portion that comprises side treated surface by the protection coating composition, which demonstrates improved corrosion resistance, adhesion properties and anti-aging adhesion properties.

The present disclosure relates generally to corrosion-inhibiting compositions, methods for improved corrosion inhibition of metal surfaces used in oil and gas operations, and treated metal containments. Corrosion-inhibiting compositions include a paraffinic oil solvent and corrosion inhibitor(s), wherein the paraffinic oil has about 5-40% paraffin content for improved corrosion inhibition.

The present invention reveals an improved coating composition for the production of necessary dielectric layers within the radio frequency identification (RFID) tag antennas, that can be applied by spraying, printing, or any other suitable graphic technology. The composition essentially consists of dielectric material such as barium titanate (BaTiO.sub.3), of particles size 48-500 nm, 10.00-40.00% w/w, polyvinylpyrrolidone (PVP) as a polymeric dispersant and polyvinyl alcohol (PVOH) as a polymeric binder per 1.00-10.00% w/w each, a water-miscible solvent such as isopropanol, 30.00-55.00% w/w, and up to 100% w/w of demineralized water. The composition according to the present invention is used for forming a flexible dielectric coating in the manufacturing of RFID tags.

The present invention is generally directed to fire retardant compositions containing one or more fire retardants, one or more polymers (e.g., one or more biopolymers such as xanthan gum) and colloidal silica. Certain aspects of the present invention are directed to liquid fire retardant concentrate compositions that form a durable (e.g., water-resistant) barrier when applied. The compositions of the present invention optionally include micronized clay. The present invention is also directed to various other compositions, which may be referred to as water-resistant film forming compositions that contain one or more polymers (e.g., one or more biopolymers such as xanthan gum) and colloidal silica. The present invention is also directed to such compositions containing micronized clay and colloidal silica. A water-resistant barrier formed by the compositions of the present invention provide compositions suitable for use in a variety of other applications, in addition to fire retardant compositions.

A corrosion resistant structure is provided. The corrosion resistant structure includes a steel layer, a metal layer, and an organic layer. The metal layer contains zinc, aluminum, or a combination thereof. The metal layer is disposed on the steel layer. The metal layer is in contact with the steel layer. The metal layer and the steel layer have different compositions. The organic layer is disposed on the metal layer. The organic layer is in contact with the metal layer. The organic layer includes an organic resin, a diol compound containing two aliphatic rings, and an alkali earth metal salt.