Chromium-free corrosion inhibition coating

Patent metadata

Field	Value
Publication number	US-10829647-B2
Application number	US-201816216672-A
Country	US
Kind code	B2
Filing date	Dec 11, 2018
Priority date	Dec 11, 2018
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

Disclosed is a corrosion inhibition coating, comprising: a base comprising a matrix and a metal within the matrix; and an inhibitor comprising: zinc molybdate, cerium citrate, magnesium metasilicate, a metal phosphate silicate, or a combination thereof, wherein the metal within the matrix comprises aluminum, an aluminum alloy, zinc, a zinc alloy, magnesium, a magnesium alloy, or a combination thereof. Also disclosed is a substrate coated with the corrosion inhibition coating.

First claim

What is claimed is:

1. A corrosion inhibition coating composition, comprising:
a base comprising a matrix and a metal within the matrix; and
an inhibitor comprising two or more of:
zinc molybdate,
cerium citrate,
magnesium metasilicate,
a metal phosphate silicate,

wherein the metal within the matrix comprises aluminum, an aluminum alloy, zinc, a zinc alloy, magnesium, a magnesium alloy, or any combination(s) thereof.

2. The corrosion inhibition coating composition of claim 1 , wherein the matrix comprises silicate, epoxy, ceramic, or any combination(s) thereof.

3. The corrosion inhibition coating composition of claim 1 , wherein the corrosion inhibition coating composition comprises:
about 70% to about 95% base by volume; and
about 5% to about 30% inhibitor by volume.

4. The corrosion inhibition coating composition of claim 1 , wherein the corrosion inhibition coating composition comprises less than or equal to about 10% inhibitor by volume.

5. The corrosion inhibition coating composition of claim 1 , wherein the inhibitor comprises three or more of:
zinc molybdate;
cerium citrate;
magnesium metasilicate;
a metal phosphate silicate.

6. The corrosion inhibition coating composition of claim 1 , wherein the corrosion inhibition coating composition comprises 0% chromium.

7. The corrosion inhibition coating composition of claim 1 , wherein the corrosion inhibition coating composition comprises 0% magnesium molybdate.

8. The corrosion inhibition coating composition of claim 1 , wherein the metal phosphate silicate comprises aluminum phosphate silicate, zinc phosphate silicate, calcium phosphate silicate, strontium phosphate silicate, or any combination(s) thereof.

9. The corrosion inhibition coating composition of claim 1 , wherein the inhibitor is a powder.

10. The corrosion inhibition coating composition of claim 1 , wherein the inhibitor is mixed within the base.

11. The corrosion inhibition coating composition of claim 1 , wherein the base and the inhibitor are two distinct layers.

12. The corrosion inhibition coating composition of claim 11 , wherein the inhibitor is coated on the base.

13. The corrosion inhibition coating composition of claim 11 , further comprising a second matrix, wherein the inhibitor is mixed within the second matrix.

14. The corrosion inhibition coating composition of claim 13 , wherein the second matrix comprises silicate, epoxy, ceramic, or any combination(s) thereof.

15. A substrate coated with the corrosion inhibition coating composition of claim 1 .

16. The substrate of claim 15 , wherein the substrate comprises steel, aluminum, zinc, magnesium, or any combination(s) thereof.

17. The substrate of claim 15 , wherein the substrate is an aircraft component.

18. The substrate of claim 17 , wherein the aircraft component is a propeller blade, a propeller shank, a propeller hub, a propeller barrel, a propeller tulip, a landing gear component, an engine gear, an engine disc, a shaft, a strut, or a counterweight.

19. A corrosion inhibition coating composition comprising:
a base comprising a matrix and a metal within the matrix; and
an inhibitor comprising:
zinc molybdate;
cerium citrate;
magnesium metasilicate; and
a metal phosphate silicate,
wherein the metal within the matrix comprises aluminum, an aluminum alloy, zinc, a zinc alloy, magnesium, a magnesium alloy, or any combination(s) thereof.

20. A corrosion inhibition coating composition comprising:
a base comprising a matrix and a metal within the matrix; and
an inhibitor comprising:
zinc molybdate; and
cerium citrate,
wherein the metal within the matrix comprises aluminum, an aluminum alloy, zinc, a zinc alloy, magnesium, a magnesium alloy, or any combination(s) thereof.

Assignees

• Hamilton Sundstrand Corp
• Hamilton Sunstrand Corp

Inventors

• Zhu Tianli
• Smith Blair A
• Zhang Weilong
• Kryzman Michael A
• Zafiris Georgios S
• Van Hassel Bart Antonie

Classifications

• C09D5/103

  containing Al · CPC title

• C23C18/52

  using reducing agents for coating with metallic material not provided for in a single one of groups C23C18/32 - C23C18/50 · CPC title

• C08K5/098

  Metal salts of carboxylic acids · CPC title

• C08K2003/2255

  of molybdenum · CPC title

• C23F11/184

  Phosphorous, arsenic, antimony or bismuth containing compounds · CPC title