Low temperature-cured corrosion inhibition coating

Patent metadata

Field	Value
Publication number	US-11613813-B2
Application number	US-202016838378-A
Country	US
Kind code	B2
Filing date	Apr 2, 2020
Priority date	Apr 8, 2019
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

Disclosed is a corrosion inhibition coating, comprising: a base comprising a silicate matrix, wherein aluminum, an aluminum alloy, or a combination thereof, is present within the silicate matrix; and an inhibitor comprising: zinc molybdate, cerium citrate, magnesium metasilicate, a metal phosphate silicate, or a combination thereof, wherein a curing temperature of the corrosion inhibition coating is about 20° C. to about 190° C., preferably about 20° C. to about 120° C. Also disclosed is a substrate coated with the corrosion inhibition coating, wherein the substrate is a peened part.

First claim

What is claimed is:

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

wherein a curing temperature of the corrosion inhibition coating composition is about 20° C. to about 190° C.; and
wherein the corrosion inhibition coating composition comprises less than or equal to about 10% inhibitor by volume.

2. The corrosion inhibition coating composition of claim 1 , wherein the corrosion inhibition coating composition comprises:
about 70% to about 95% base by volume; and
between 5% and 10% inhibitor by volume.

3. The corrosion inhibition coating composition of claim 1 , wherein the inhibitor consists of:
zinc molybdate;
cerium citrate;
magnesium metasilicate;
a metal phosphate silicate, or any combination(s) thereof.

4. The corrosion inhibition coating composition of claim 1 , wherein the silicate matrix comprises an alkali metal silicate.

5. The corrosion inhibition coating composition of claim 1 , wherein the corrosion inhibition coating comprises 0% chromium, 0% magnesium metasilicate, or a combination thereof.

6. The corrosion inhibition coating composition of claim 1 , wherein the aluminum alloy comprises aluminum-zinc, aluminum-zinc-indium, or a combination thereof.

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

8. The corrosion inhibition coating composition of claim 1 , further comprising a second matrix, wherein the inhibitor is mixed within the second matrix.

9. A substrate coated with the corrosion inhibition coating composition of claim 1 , wherein the substrate is a peened part.

10. The substrate of claim 9 , wherein the substrate comprises steel, aluminum, zinc, magnesium, steel alloy, aluminum alloy, zinc alloy, magnesium alloy, or any combination(s) thereof.

11. The substrate of claim 9 , wherein the substrate is one of: 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.

12. The corrosion inhibition coating composition of claim 1 , wherein the curing temperature of the corrosion inhibition coating composition between 20° C. and 120° C.

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

wherein a curing temperature of the corrosion inhibition coating composition is about 20° C. to about 190° C.;
wherein the inhibitor comprises:
from 1% to 50% zinc molybdate by weight;
from 1% to 50% cerium citrate by weight;
from 1% to 50% magnesium metasilicate by weight; and
from 1% to 50% of a metal phosphate silicate by weight.

14. The corrosion inhibition coating composition of claim 13 , wherein the inhibitor comprises:
about 25% zinc molybdate by weight;
about 25% cerium citrate by weight;
about 25% magnesium metasilicate by weight; and
about 25% of a metal phosphate silicate by weight.

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

wherein a curing temperature of the corrosion inhibition coating composition is about 20° C. to about 190° C.;
wherein the base and the inhibitor are two distinct layers.

16. The corrosion inhibition coating composition of claim 15 , wherein the inhibitor is coated on the base.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Zhu Tianli
• Zhang Weilong
• Kryzman Michael A
• Smith Blair A
• Zafiris Georgios S
• Brucelle Olivier

Classifications

• F01D5/288

  Protective coatings for blades · CPC title

• C09D7/63

  organic · CPC title

• C09D5/106

  containing Zn · CPC title

• C09D5/103

  containing Al · CPC title

• C23F11/188 Primary

  containing phosphates · CPC title