A method of applying a trivalent chromium or chromium-free conversion coating to a metallic substrate including mixing a dye compound that interacts with electromagnetic radiation outside the human visual spectrum but not electromagnetic radiation that is within the human visual spectrum to produce an observable emission into the trivalent chromium or chromium-free conversion coating mixture to allow for inspection of the coating after applied with a correlating electromagnetic radiation source.

According to embodiments disclosed herein, a corrosion-resistant substrate may comprise a substrate comprising a first surface and a corrosion-resistant film positioned on at least a portion of the first surface of the substrate. A method of producing a corrosion-resistant substrate may comprise contacting at least a portion of a first surface of a substrate with a corrosion inhibitor solution and drying the corrosion inhibitor solution to produce the corrosion-resistant film on the substrate, wherein at least a portion of the solvent may be expelled from the corrosion inhibitor solution during the drying to form the corrosion-resistant film, such that the corrosion-resistant film is solid. The corrosion inhibitor solution and the corrosion-resistant film may comprise a pyridinium hydroxyl alkyl ether compound.

The present disclosure relates to substrates and methods of producing substrates thereof. The substrates have a metal substrate and a sol-gel coating disposed on the metal substrate. The sol-gel coating includes about 3 wt % to about 15 wt % by volume of an organic corrosion inhibitor to the sol-gel. The sol-gel includes surfactant and a reaction product of an epoxy-containing organosilane, a metal alkoxide, and an acid.

According to embodiments disclosed herein, a corrosion-resistant substrate may comprise a substrate comprising a first surface and a corrosion-resistant film positioned on at least a portion of the first surface of the substrate. A method of producing a corrosion-resistant substrate may comprise contacting at least a portion of a first surface of a substrate with a corrosion inhibitor solution and drying the corrosion inhibitor solution to produce the corrosion-resistant film on the substrate, wherein at least a portion of the solvent may be expelled from the corrosion inhibitor solution during the drying to form the corrosion-resistant film, such that the corrosion-resistant film is solid. The corrosion inhibitor solution and the corrosion-resistant film may comprise a bis-quaternized ammonium compound.

The present disclosure relates to a systems and methods for a coated substrate having a metal substrate and a sol-gel coating disposed on the metal substrate. The sol-gel includes a corrosion inhibitor, a surfactant and a reaction product of an epoxy-containing organosilane, a metal alkoxide, and an acid. The coated substrate includes an organic primer coating having an organic primer having a plurality of metal particles.

Described herein are compounds for use in coating compositions and methods of using the same. Also described herein is a method of treating metal products (e.g., aluminum alloy products), including applying the coating composition to at least one surface of the metal product. Further described herein is a joined structure, including the coated aluminum alloy product and another metal or alloy. The coating compositions enhance the bond performance of the joined structures.

A matte clear anti-fouling anti-corrosion surface coating and uses thereof, and a matte clear anti-fouling anti-corrosion surface layer and a matte clear anti-fouling anti-corrosion metal, wherein the matte clear anti-fouling anti-corrosion surface coating comprises: a fluorine-modified polysilazane and a solvent, wherein the content of the fluorine-modified polysilazane is approximately 5-80% by weight based on the total weight of the matte clear anti-fouling anti-corrosion surface coating. Accordingly, the coating can be applied to a corrosion-prone metal sheet or a corrosion-prone metal plate with a protective priming coat (a coated object). The coating is stain repellent, hydrophobic, anti-graffiti, corrosion resistant, clear, matte clear, resistant to temperature changes, resistant to impact, and tough among other characteristics, and is capable of not changing the original color or gloss of the coated object; the coating can be cured at room temperature for direct uses outdoors, and/or can be heated and cured for uses in factories. Additionally, the coating can also be applied directly on a surface of a metal that is not susceptible to rusting, wherein the coating can be applied directly after the addition of a matting agent, or without the addition of a matting agent and the coating can still be matte clear as described above.

The present invention relates to a coating comprising a (i) boronic ester of Formula (I) disclosed herein, and (ii) an elastomer, wherein (i) and (ii) are cured with pentaerythritol tetrakis(3-mercaptoptopionate) (PTMP) and 3,6-dioxa-1,8-octanedithiol (DODT).

Compositions are described for protecting a metal surface against corrosion. The composition includes a corrosion-inhibiting particle. The corrosion inhibiting particle may be usable in an epoxy resin-based coating or an olefin resin-based coating. The particle may include a core and a protectant. The core may include a water soluble corrosion inhibitor. The protectant may be disposed on at least a portion of a surface of the core and may be covalently or ionically bonded to a thiol group of the corrosion inhibitor. The protectant may be configured to reduce reaction between the core and the epoxy resin or the olefin resin. Methods of making the compositions are also disclosed.

Compositions are described for protecting a metal surface against corrosion. The composition includes a corrosion-inhibiting particle. The corrosion inhibiting particle may be usable in an epoxy resin-based coating or an olefin resin-based coating. The particle may include a core and a protectant. The core may include a water soluble corrosion inhibitor. The protectant may be disposed on at least a portion of a surface of the core and may be covalently or ionically bonded to a thiol group of the corrosion inhibitor. The protectant may be configured to reduce reaction between the core and the epoxy resin or the olefin resin. Methods of making the compositions are also disclosed.