Polymeric agents and compositions for inhibiting corrosion

Patent metadata

Field	Value
Publication number	US-12522735-B2
Application number	US-202418658685-A
Country	US
Kind code	B2
Filing date	May 8, 2024
Priority date	Mar 11, 2016
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

The present disclosure is directed to processes, compositions and agents for inhibiting corrosion in various substrates, for example metal substrates. The present disclosure is also directed to corrosion inhibitors comprising organometallic polymers such as metal-organic frameworks (MOFs), including compositions and processes comprising MOFs for inhibiting corrosion in metal substrates.

First claim

What is claimed is:

1 . A coated substrate comprising a substrate coated with a corrosion inhibiting composition comprising a metal organic framework (MOF),
wherein: the MOF comprises metal ions or metal clusters each coordinated to one or more organic ligands to form at least a one-, two- or three dimensional network, and wherein the one or more organic ligands are independently selected from the group consisting of optionally substituted aryl, heteroaryl or heterocyclic groups, each of the aryl, heteroaryl or heterocyclic groups comprise at least one exocyclic sulphur group, the metal ions or metal clusters of the MOFs are independently selected from at least one of rare earth metals and transitions metals, the at least one of rare earth metals and transition metals is selected from the group consisting of Zn, Pr, Ce, and combinations thereof, and a molar ratio of organic ligand:metal ions is at least 2:1.

2 . The coated substrate of claim 1 , wherein the corrosion inhibiting composition is applied as a direct coating to the surface of the substrate.

3 . The coated substrate of claim 1 , wherein the substrate is a metal alloy and the corrosion inhibiting composition comprises a film-forming organic polymer.

4 . The coated substrate of claim 1 , wherein the one or more organic ligands comprising at least one exocyclic sulphur group are independently a compound of Formula 1:

wherein
A is a 5- or 6-membered aryl, heteroaryl, or heterocyclic ring, which is optionally fused with one or more aryl or heteroaryl rings, wherein the dotted line represents an optional double bond;
X 1 is selected from the group consisting of N, NR 1 , O, S, CR 2 , and CR 3 R 4 ;
X 2 is selected from the group consisting of N, NR 5 , O, S, CR 6 , and CR 7 R 8 ;
X 3 is selected from the group consisting of N, NR 9 , CR 10 , and CR 11 R 12 ;
R 1 , R 5 and R 9 are independently selected from the group consisting of hydrogen, amino, C 1 -C 10 alkyl, C 2 -C 10 alkenyl, C 2 -C 10 alkynyl, aryl and heteroaryl; and
R 2 , R 3 , R 4 , R 6 , R 7 , R 8 , R 10 , R 11 and R 12 are each independently selected from the group consisting of hydrogen, halo, amino, thiol, thione, C 1 -C 10 alkyl, C 2 -C 10 alkenyl, C 2 -C 10 alkynyl, aryl, and heteroaryl, wherein each amino, alkyl, alkenyl, alkynyl, aryl, or heteroaryl group may be optionally substituted.

5 . The coated substrate of claim 4 , wherein X 1 is selected from the group consisting of N, NH, and S.

6 . The coated substrate of claim 4 , wherein X 3 is selected from the group consisting of N and CR 10 .

7 . The coated substrate of claim 6 , wherein R 10 is selected from the group consisting of thiol and thione.

8 . The coated substrate of claim 4 , wherein X 1 is N, X 2 is N, and X 3 is C—SH.

9 . The coated substrate of claim 4 , wherein the MOF is a solid particle.

10 . The coated substrate of claim 9 , wherein the solid particle has an average diameter of 20 nm to 50 μm.

11 . A coated substrate comprising:
a substrate coated with a corrosion inhibiting composition comprising a corrosion inhibitor-containing metal organic framework (MOF), wherein the MOF comprises a plurality of metal ions or a plurality of metal clusters each coordinated to one or more organic ligands to form a one-, two- or three dimensional network, and wherein the one or more organic ligands are independently selected from the group consisting of optionally substituted aryl, heteroaryl, and heterocyclic groups, wherein the aryl, heteroaryl, and heterocyclic groups comprise at least one exocyclic sulphur group, and a molar ratio of organic ligand:metal is 2:1 or greater.

12 . The coated substrate of claim 11 , wherein the corrosion inhibiting composition is disposed directly as a coating to the surface of the substrate.

13 . The coated substrate of claim 11 , wherein the substrate is a metal alloy and the corrosion inhibiting composition comprises a film-forming organic polymer.

14 . The coated substrate of claim 11 , wherein:
the corrosion inhibiting composition is disposed directly as a coating to the surface of the substrate, the substrate is a metal alloy, and the corrosion inhibiting composition comprises a film-forming organic polymer.

15 . The coated substrate of claim 11 , wherein the one or more organic ligands comprising at least one exocyclic sulphur group are independently a compound of Formula 1:

wherein
A is a 5- or 6-membered aryl, heteroaryl, or heterocyclic ring, which is optionally fused with one or more aryl or heteroaryl rings, wherein the dotted line represents an optional double bond;
X 1 is selected from the group consisting of N, NR 1 , O, S, CR 2 , and CR 3 R 4 ;
X 2 is selected from the group consisting of N, NR 5 , O, S, CR 6 , and CR 7 R 8 ;
X 3 is selected from the group consisting of N, NR 9 , CR 10 , and CR 11 R 12 ;
R 1 , R 5 and R 9 are independently selected from the group consisting of hydrogen, amino, C 1 -C 10 alkyl, C 2 -C 10 alkenyl, C 2 -C 10 alkynyl, aryl and heteroaryl; and
R 2 , R 3 , R 4 , R 6 , R 7 , R 8 , R 10 , R 11 and R 12 are each independently selected from the group consisting of hydrogen, halo, amino, thiol, thione, C 1 -C 10 alkyl, C 2 -C 10 alkenyl, C 2 -C 10 alkynyl, aryl, and heteroaryl, wherein each amino, alkyl, alkenyl, alkynyl, aryl, or heteroaryl group may be optionally substituted.

16 . The coated substrate of claim 15 , wherein X 1 is selected from the group consisting of N, NH, and S.

17 . The coated substrate of claim 15 , wherein X 3 is selected from the group consisting of N and CR 10 .

18 . The coated substrate of claim 17 , wherein R 10 is selected from the group consisting of thiol and thione.

19 . The coated substrate of claim 15 , wherein X 1 is N, X 2 is N, and X 3 is C—SH.

20 . The coated substrate of claim 15 , wherein the MOF is a solid particle having an average diameter of 20 nm to 50 μm.

Assignees

• Boeing Co
• Commw Scient Ind Res Org

Inventors

• Mardel James Ivan
• Cole Ivan Stewart
• White Paul Andrew
• Hughes Anthony Ewart
• Markley Tracey Anne
• Harvey Timothy Graham
• Osborne Joseph
• Sapper Erik

Classifications

• C09D5/082

  characterised by the anti-corrosive pigment · CPC title

• C07F3/06

  Zinc compounds · CPC title

• B05D7/26

  synthetic lacquers or varnishes (B05D7/08, B05D7/16 take precedence) · CPC title

• B05D2202/25

  based on Al · CPC title

• B05D2202/00

  Metallic substrate · CPC title