# US 10,865,340 B2 · Coatings for corrosion protection

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- Number: US 10,865,340 B2
- Document ID: US10865340B2
- Status: Granted
- Kind: B2
- Application number: 16/288,961
- Filed: 2019-02-28
- Published: 2020-09-03
- Granted: 2020-12-15
- Earliest claimed: 2019-02-28
- Assignees: Saudi Arabian Oil Company
- Applicants: Saudi Arabian Oil Company
- Inventors: Abdullah Ayedh Al-Shahrani; Gasan Selman Alabedi; Ihsan Mahmoud Al-Taie
- Web page: https://patentgrep.com/patent/US10865340B2

## CPC

- C09K 8/54: Compositions for in situ inhibition of corrosion in boreholes or wells
- C09D 5/084: {Inorganic compounds}
- C09D 5/086: {Organic or non-macromolecular compounds}
- C09D 7/20: Diluents or solvents
- C09D 7/62: modified by treatment with other compounds
- C09D 7/70: {characterised by shape, e.g. fibres, flakes or microspheres}
- C09D 163/00: Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
- C08K 3/346: {Clay}
- C08K 9/04: Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)}
- C09K 2208/32: Anticorrosion additives
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The present application provides corrosion protection compositions. In one embodiment, the corrosion protection composition of the present disclosure contains a polymer composition saturated with a clay that is intercalated with a C1-22 alkyl amine or a C1-22 alkyl ammonium cation. Methods of protecting metal surfaces from corrosion are also provided.

## Claims

### Claim 1

A corrosion protection composition comprising a polymer composition that comprises about 3 wt. % phyllosilicate clay that is intercalated with a C1-22 alkyl amine or a C1-22 alkyl ammonium cation.

### Claim 2 (depends on 1)

The corrosion protection composition of claim 1, wherein the polymer is an epoxy resin.

### Claim 3 (depends on 2)

The corrosion protection composition of claim 2, wherein the epoxy resin is a diglycidyl ether of bisphenol A (DGEBA).

### Claim 4 (depends on 1)

The corrosion protection composition of claim 1, wherein the phyllosilicate clay is a bentonite.

### Claim 5 (depends on 1)

The corrosion protection composition of claim 1, wherein the clay comprises a hexadecylamine or a hexadecylammonium cation.

### Claim 6 (depends on 1)

The corrosion protection composition of claim 1, further comprising an amine hardener.

### Claim 7 (depends on 6)

The corrosion protection composition of claim 6, wherein the amine hardener is 4,4′-methylenedianiline.

### Claim 8 (depends on 1)

The corrosion protection composition of claim 1, further comprising an organic solvent.

### Claim 9 (depends on 1)

The corrosion protection composition of claim 1, wherein the organic solvent is xylene.

### Claim 10

A corrosion protection composition comprising a diglycidyl ether of bisphenol A (DGEBA) resin composition saturated with a modified bentonite clay that is intercalated with a hexadecylamine or a hexadecylammonium cation, wherein an amount of the modified bentonite clay in the saturated resin composition is about 3 wt. %.

### Claim 11

A method of protecting a metal surface from corrosion, the method comprising coating the metal surface with a corrosion protection composition comprising a polymer composition comprising about 3 wt. % of a clay that is intercalated with a C1-22 alkyl amine or a C1-22 alkyl ammonium cation.

### Claim 12 (depends on 11)

The method of claim 11, wherein the metal surface is steel surface.

### Claim 13 (depends on 11)

The method of claim 11, wherein the polymer is an epoxy resin.

### Claim 14 (depends on 11)

The method of claim 11, wherein the clay further comprises a phyllosilicate clay.

### Claim 15 (depends on 11)

The method of claim 11, wherein a resistance of the coating on the metal surface is greater than about 10×10{circumflex over ( )}4 Ω·cm2.

### Claim 16 (depends on 15)

The method of claim 15, wherein the resistance is in the range of about 1×10{circumflex over ( )}8 Ω·cm2 to about 10×10{circumflex over ( )}8 Ω·cm2.

### Claim 17 (depends on 11)

The method of claim 11, wherein a capacitance of the coating on the metal surface is less than about 1×10{circumflex over ( )}−5 F.

### Claim 18 (depends on 17)

The method of claim 17, wherein the capacitance is in the range of about 1×10{circumflex over ( )}−11 F to about 1×10{circumflex over ( )}−11 F.

### Claim 19

A method of protecting a metal surface from corrosion, the method comprising coating the metal surface with a corrosion protection composition comprising an epoxy resin composition comprising 3 wt. % of a phyllosilicate clay that is intercalated with a C1-22 alkyl amine or a C1-22 alkyl ammonium cation, wherein a resistance of the coating on the metal surface is greater than about 5×10{circumflex over ( )}8 Ω·cm2.