Oleophobic and hydrophilic conductive coating for impressed current cathodic protection anode

Patent metadata

Field	Value
Publication number	US-2021189570-A1
Application number	US-201916725299-A
Country	US
Kind code	A1
Filing date	Dec 23, 2019
Priority date	Dec 23, 2019
Publication date	Jun 24, 2021
Grant date	—

Abstract

A cathodic protection system that comprises a vessel for containing a fluid, an anode positioned inside the vessel, a hydrophilic and oleophobic coating covering at least a portion of the anode, wherein the coating allows ions to pass therethrough and repels oil and wax contaminants from reaching at least a portion of the anode, and an impressed current source electrically connected to the anode and the vessel, the vessel being a cathode when current is applied from the current source. A corrosion protection method coats at least a portion of a suitably sized anode, with a material having hydrophilic and oleophobic properties, positions the coated anode in the vessel, and fills the vessel with fluid. A voltage is applied between the vessel and the anode so that ions flow from the anode, through the fluid, to the vessel.

First claim

1 . A cathodic protection system, the cathodic protection system comprising:
a vessel for containing a fluid; an anode positioned inside the vessel; a hydrophilic and oleophobic coating covering at least a portion of the anode, wherein the coating allows ions to pass therethrough and repels oil and wax contaminants from reaching at least a portion of the anode; and an impressed current source electrically connected to the anode and the vessel, the vessel being a cathode when current is applied from the current source; wherein the coating has a thickness ranging from about 10 microns to about 900 microns.

2 . The cathodic protection system of claim 1 , wherein the coating includes a composition that has both conductive and oleophobic properties.

3 . The cathodic protection system of claim 2 , wherein the composition of the coating has conductive and oleophobic properties.

4 . The cathodic protection system of claim 3 , wherein the coating comprises a single layer.

5 . The cathodic protection system of claim 4 , wherein the single layer coating comprises graphene oxide (GO).

6 . The cathodic protection system of claim 1 , wherein the coating includes a conductive filler material and an oleophobic binder.

7 . The cathodic protection system of claim 1 , wherein the coating includes particulate conductive functional additives and an oleophobic binder.

8 . The cathodic protection system of claim 1 , wherein the coating contains two distinct layers including a first conductive layer in contact with the anode, and a second oleophobic layer positioned over the first layer.

9 . The cathodic protection system of claim 1 , wherein the coating includes a composition made of a metal and a non-metallic organic or inorganic material and an oleophobic binder.

10 . (canceled)

11 . The cathodic protection system of claim 1 , wherein the coating has a thickness ranging from about 10 microns to about 99 microns.

12 . A method of providing corrosion protection to a vessel, the method comprising the steps of:
providing an anode sized to provide a predetermined amount of cathodic protection at a predetermined voltage, based on the fluids and conditions expected in the vessel, the size of the vessel, and the number of anodes to be used; coating at least a portion of the anode with a coating having hydrophilic and oleophobic properties; positioning the coated anode in the vessel; and filling the vessel with fluid and applying a voltage between the vessel and the anode so that ions flow from the anode, through the fluid, to the vessel; wherein the coating has a thickness ranging from about 10 microns to about 900 microns.

13 . The method of claim 12 , wherein the coating includes a composition that has both conductive and oleophobic properties.

14 . (canceled)

15 . The method of claim 14 , wherein the coating step comprises applying a single layer coating to the anode.

16 . The method of claim 12 , wherein the coating comprises graphene oxide (GO) binder.

17 . The method of claim 12 , wherein the coating includes a conductive filler material and an oleophobic binder.

18 . The method of claim 12 , wherein the coating includes particulate conductive functional additives and an oleophobic binder.

19 . The method of claim 12 , wherein the coating contains two distinct layers including a first conductive layer in contact with the anode, and a second oleophobic layer positioned over the first layer.

20 . The method of claim 12 , wherein the coating includes a composition made of a metal and a non-metallic organic or inorganic material and an oleophobic binder.

21 . (canceled)

22 . The method of claim 12 , wherein the coating has a thickness ranging from about 10 microns to about 99 microns.

23 . A cathodic protection system, the cathodic protection system comprising:
a vessel for containing a fluid; an anode positioned inside the vessel; a hydrophilic and oleophobic coating covering at least a portion of the anode, wherein the coating allows ions to pass therethrough and repels oil and wax contaminants from reaching at least a portion of the anode; and an impressed current source electrically connected to the anode and the vessel, the vessel being a cathode when current is applied from the current source; wherein the coating has a thickness ranging from about 10 microns to about 99 microns.

Assignees

• Saudi Arabian Oil Co

Inventors

• Al-Khaldi Turki A
• Al Haque Ebadul Z
• Bakthavatchalu Balasubramani

Classifications

• C23F13/16 Primary

  Electrodes characterised by the combination of the structure and the material · CPC title

• C09D5/4488

  Cathodic paints (C09D5/4403 - C09D5/4476 take precedence) · CPC title

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C23F13/06 Primary

  Constructional parts, or assemblies of cathodic-protection apparatus · CPC title