This invention relates to a zinc-rich epoxy anti-corrosion coating comprising a component A capable of being cured into a film, and a component B containing a curing agent, wherein the component A comprises, by mass percentage, 0.1-5 wt % graphene, 0-35 wt % zinc powder, 30-70 wt % filler, 10-20 wt % epoxy resin having 54 wt % solid content, and 10-20 wt % solvent, wherein the sum of the mass percentage contents of the graphene, zinc powder and filler is 60-80 wt % and the sum of the mass percentage contents of all components of component A is 100 wt %. According to the present invention, the addition of graphene to an anti-corrosion coating decreases the thickness of the coating film, reduces the amount of zinc powder while increases the anti-corrosion effect. It reduces zinc oxide vapour generated during welding and is environmentally friendly.

A method for coating metallic surfaces with an aqueous composition, which contains an aqueous solution of a zinc salt, by flooding, spraying and/or immersion, wherein, for spraying or immersion, the initial temperature of the substrate lies in the range from 5 to 400? C., in that, for flooding, the initial temperature of the substrate lies in the range from 100 to 400? C. and in that an anticorrosive nanocrystalline zinc oxide layer is formed on the metallic surface. Corresponding aqueous composition, the nanocrystalline zinc oxide layer and the use of the coated substrates are also disclosed.

A lifetime diagnosis component for anticorrosive coating includes a plate-shaped base member having an aluminum layer on a surface thereof; and a sacrificial anode layer portion formed of zinc on the base member. The surface of the base member has a base-member exposing portion where the aluminum layer is exposed.

The composition described herein for the prevention of corrosion comprises: sacrificial metal particles more noble than a metal substrate to which the composition contacts; carbonaceous material that can form electrical contact between the sacrificial metal particles; and means for providing an anticorrosion coating material for the metal substrate. The composition can form a coating on a metal substrate surface. A method for applying the composition for the prevention of corrosion is also described herein.

The present invention is related to a method for obtaining an organometallic (zinc flake) coating in an aqueous solution. More specifically, the present invention is related to obtaining a zinc flake type coating comprising a nanometric colloidal silica layer. Within the scope, the present invention suggests a method for obtaining a coating for metallic parts with improved surface hardness and high performance against corrosion. The present invention is further related to a method for applying the organometallic coatings thus obtained to metal parts and to the organometallic coatings.

Coating a metallic surface with at least one of a pretreatment composition prior to organic coating, with a passivation composition without intent for subsequent organic coating, with a pretreatment primer composition, with a primer composition, with a paint composition and with an electrocoating composition, wherein the coating composition includes particles on a base of at least one layered double hydroxide (LDH) phase characterized by the general formula [M.sup.2+.sub.(10.5)x(M.sup.3+, M.sup.4+).sub.x(OH).sub.20.75]A.sup.n.sub.x/n.mH.sub.2O.

One or more techniques are disclosed for a method for functionalized a graphitic material comprising the steps of: 1) providing a graphitic material; 2) providing a first molecule comprising a first group, a spacer, and a second group; 3) providing a second molecule comprising a third group, a spacer, and a fourth group, wherein the third group is a different group from the first group; and 4) bonding the first molecule and the second molecule to the graphitic material. Also disclosed is a tunable material composition comprising the functionalized carbon nanotubes or functionalized graphene prepared by the methods described herein.

A corrosion-resistant coating on an aluminum-containing substrate such as an aluminum substrate, an aluminum alloy substrate (e.g., AA 2024, AA 6061, or AA7075), or other aluminum-containing substrate includes a corrosion inhibitor-incorporated ZnAl layered double hydroxide (LDH) layer and a sol-gel layer. A zinc salt and a corrosion inhibitor (e.g., a salt of an oxyanion of a transition metal such as a vanadate) is dissolved to form a zinc-corrosion inhibitor solution, and the substrate is immersed in or otherwise contacted with the solution to form the corrosion inhibitor-incorporated ZnAl LDH layer on the substrate. A sol-gel composition is applied on the corrosion inhibitor-incorporated ZnAl LDH layer of the substrate to form a sol-gel layer, and the sol-gel layer is cured.

One or more techniques are disclosed for a method for functionalized a graphitic material comprising the steps of: 1) providing a graphitic material; 2) providing a first molecule comprising a first group, a spacer, and a second group; 3) providing a second molecule comprising a third group, a spacer, and a fourth group, wherein said third group is a different group from said first group; and 4) bonding the first molecule and the second molecule to the graphitic material. Also disclosed is a tunable material composition comprising the functionalized carbon nanotubes or functionalized graphene prepared by the methods described herein.

A highly durable spring of the present invention includes a single-layer coating film with a thickness of 450 m or less, in which the coating film contains an epoxy resin, a phenolic resin, and zinc. The coating film has high corrosion resistance and chipping resistance even if it is a one thin layer with a thickness of 450 m or less. A method of coating a highly durable spring of the present invention includes an application process in which an epoxy resin-based powder coating material which contains an epoxy resin, a phenolic resin, and zinc and is produced by a melt kneading method is applied to a surface of a spring on which a coating-film is formed and a baking process in which the applied epoxy resin-based powder coating material is baked.