Corrosion inhibition coatings with thiirane crosslinkers and methods thereof
A corrosion inhibitor coating composition includes a polymerized thiosemicarbazone, and a thiirane crosslinker, where the thiirane crosslinker is a difunctional molecule. The corrosion inhibitor coating composition can include where the thiirane crosslinker may include an aliphatic thiirane, a tri-functional thiirane, a bisphenol thiirane, or a combination thereof. The corrosion inhibitor coating composition can be metal-free and catalyst-free. An article utilizing and a method of preparing a corrosion inhibitor coating composition is also disclosed, which can include adding a thiourea to a difunctional epoxy terminated molecule in solution in the presence of a catalyst, converting the difunctional epoxy terminated molecule to a thiirane terminated difunctional molecule, and purifying the thiirane terminated difunctional molecule to produce a thiirane.
1 . A corrosion inhibitor coating composition, comprising:
a polymerized thiosemicarbazone; and
a thiirane crosslinker; and
wherein the thiirane crosslinker is a difunctional molecule.
2 . The corrosion inhibitor coating composition of claim 1 , wherein the polymerized thiosemicarbazone comprises a thiosemicarbazone having the following structure:
3 . The corrosion inhibitor coating composition of claim 1 , wherein the thiirane crosslinker comprises a thiirane having the following structure:
4 . The corrosion inhibitor coating composition of claim 1 , wherein the thiirane crosslinker comprises an aliphatic thiirane, a tri-functional thiirane, a bisphenol thiirane, or a combination thereof.
5 . The corrosion inhibitor coating composition of claim 1 , wherein the corrosion inhibitor coating composition comprises no metal.
6 . The corrosion inhibitor coating composition of claim 1 , wherein the corrosion inhibitor composition comprises no catalyst.
7 . The corrosion inhibitor coating composition of claim 1 , wherein the thiirane is present in an amount of from about 0.1% to about 5.0% by total weight of the corrosion inhibitor coating composition.
8 . An article, comprising:
a substrate;
a corrosion inhibitor coating composition disposed on a surface of the substrate, comprising:
a polymerized thiosemicarbazone; and
a thiirane crosslinker; and
wherein the thiirane crosslinker comprises an aliphatic thiirane, a tri-functional thiirane, a bisphenol thiirane, or a combination thereof.
9 . The article of claim 8 , wherein the polymerized thiosemicarbazone comprises a thiosemicarbazone having the following structure:
10 . The article of claim 8 , wherein the corrosion inhibitor coating composition comprises no metal.
11 . The article of claim 8 , wherein the corrosion inhibitor composition comprises no catalyst.
12 . The article of claim 8 , wherein a thickness of the corrosion inhibitor coating composition is from about 100 nm to about 10 microns.
13 . The article of claim 8 , wherein the substrate comprises a metal, polymer, polymer composite, or combination thereof.
14 . The article of claim 8 , wherein the substrate comprises nickel plated steel.
15 . The article of claim 8 , wherein the substrate comprises a transition metal.
16 . The article of claim 8 , where no adhesive or primer is present between the substrate and the corrosion inhibitor coating composition.
17 . The article of claim 8 , wherein the article is a component or part of an aerospace vehicle or a marine vehicle.
18 . The article of claim 17 , wherein the component or part of an aerospace vehicle or marine vehicle is an external surface thereof.
19 . A method of preparing a corrosion inhibitor coating composition, comprising:
forming a solution comprising a polymerized thiosemicarbazone and a solvent;
adding a thiirane crosslinker comprising a thiirane terminated difunctional molecule to the solution; and
mixing the thiirane crosslinker and the solution.
20 . The method of preparing a corrosion inhibitor coating composition of claim 19 , further comprising:
adding a thiourea to a difunctional epoxy terminated molecule in solution in the presence of a catalyst;
converting the difunctional epoxy terminated molecule to a thiirane terminated difunctional molecule; and
purifying the thiirane terminated difunctional molecule, prior to adding the thiirane terminated difunctional molecule to the solution.