Corrosion inhibiting sol-gel compositions

Patent metadata

Field	Value
Publication number	US-10370765-B2
Application number	US-201414777642-A
Country	US
Kind code	B2
Filing date	Mar 13, 2014
Priority date	Mar 16, 2013
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

A composition for application to a metal substrate comprises a sol-gel or a silane and a corrosion inhibitor. The corrosion inhibitor comprises a lithium ion and/or an azole compound. A coated substrate includes the composition for application to a metal substrate and a coating on the composition. A method of fabricating a coated substrate comprises applying the composition to a substrate, curing the composition to form a conversion coating, and applying a coating on the conversion coating.

First claim

What is claimed is:

1. A composition for application to a metal substrate, the composition comprising:
a sol-gel; and
a corrosion inhibitor comprising a lithium ion present in an amount of 0.02 g/1000 g composition to 12 g/1000 g composition and an alkali metal ion other than lithium.

2. The composition according to claim 1 , wherein the corrosion inhibitor further comprises a counter ion capable of forming a salt with the lithium ion, the alkali metal ion other than lithium, or combinations thereof.

3. The composition according to claim 2 , wherein the counter ion comprises a carbonate ion and/or a hydroxide ion.

4. The composition according to claim 1 , wherein the sol-gel comprises an organosilane based sol-gel.

5. The composition according to claim 4 , wherein the organosilane based sol-gel comprises allyltrimethoxysilane, n-(2-aminoethyl)-3-aminopropyltrimethoxysilane, p-aminophenylsilane, 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-glycidoxypropyldiisopropylethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, glycidyloxy-(C2-C6 alkyl)trialkoxysilanes comprising 3-glycidoxypropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-methacryloxypropy lmethyldiethoxy silane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, n phenylaminopropyltrimethoxysilane, vinylmethyldiethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, or a mixture thereof.

6. The composition according to claim 4 , wherein the organosilane based sol-gel comprises a glycidyloxy-(C2-C6 alkyl)trialkoxysilane.

7. The composition according to claim 4 , wherein the organosilane based sol-gel comprises 3-glycidoxypropyltrimethoxysilane.

8. The composition according to claim 1 , wherein the sol-gel comprises an organometallic compound.

9. The composition according to claim 8 , wherein the organometallic compound comprises an alkoxyzirconium compound.

10. The composition according to claim 1 , further comprising an azole compound.

11. The composition according to claim 10 , wherein the azole compound comprises 2,5-dimercapto-1,3,4-thiadiazole.

12. A coated article, comprising:
a substrate; and
the composition of claim 1 on at least a portion of the substrate.

13. The coated article of claim 12 , wherein the substrate comprises aluminum.

14. The coated article of claim 12 , further comprising a coating on the composition.

15. A method of manufacturing a coated article, the method comprising:
applying the composition of claim 1 to at least a portion of a substrate; and
curing the composition to form a sol-gel coating.

16. The method of claim 15 , further comprising pre-treating the substrate prior to application of the composition.

17. The method of claim 15 , further comprising applying a coating on at least a portion of the sol-gel coating.

18. A composition for application to a metal substrate, the composition comprising:
a corrosion inhibitor comprising a lithium ion present in an amount of 0.02 g/1000 g composition to 12 g/1000 g composition, an alkali metal ion other than lithium, and a counter ion capable of forming a salt with the lithium ion, the alkali metal ion other than lithium, or combinations thereof, wherein the counter ion comprises a carbonate ion and/or a hydroxide ion; and
a silane.

Assignees

• Prc Desoto Int Inc

Inventors

• Morris Eric L

Classifications

• C23C2222/20

  Use of solutions containing silanes · CPC title

• C23C18/54

  Contact plating, i.e. electroless electrochemical plating · CPC title

• C23C18/1254 Primary

  Sol or sol-gel processing · CPC title

• C23C18/122

  Inorganic polymers, e.g. silanes, polysilazanes, polysiloxanes · CPC title

• C09D5/086

  Organic or non-macromolecular compounds · CPC title