CA2114858A1 - Nickel-organic polymer coating method and water apparatus - Google Patents
Nickel-organic polymer coating method and water apparatusInfo
- Publication number
- CA2114858A1 CA2114858A1 CA 2114858 CA2114858A CA2114858A1 CA 2114858 A1 CA2114858 A1 CA 2114858A1 CA 2114858 CA2114858 CA 2114858 CA 2114858 A CA2114858 A CA 2114858A CA 2114858 A1 CA2114858 A1 CA 2114858A1
- Authority
- CA
- Canada
- Prior art keywords
- water
- nickel
- organic polymer
- coating
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
- ?6 _ ABSTRACT OF THE DISCLOSURE
The method of the invention relates to a treatment for reducing water caused corrosion of water equipment.
A water apparatus, such as a water heater tank or boiler, has a nickel, water exposed surface. This water exposed, nickel surface has an organic polymer coating applied to the surface. The organic polymer coating is then heated to permanently adhere to the surface. The invention also relates to water apparatus made by the method of the invention. The apparatus has a water exposed, nickel surface covered with an organic polymer coating that permanently adheres to the nickel surface.
The method of the invention relates to a treatment for reducing water caused corrosion of water equipment.
A water apparatus, such as a water heater tank or boiler, has a nickel, water exposed surface. This water exposed, nickel surface has an organic polymer coating applied to the surface. The organic polymer coating is then heated to permanently adhere to the surface. The invention also relates to water apparatus made by the method of the invention. The apparatus has a water exposed, nickel surface covered with an organic polymer coating that permanently adheres to the nickel surface.
Description
8 ~ ~
~3~C~GROI~ND OF THE INVENTION
1. FielA of the Invention:
The present invention relates to a method for ; treating a water apparatus with nickel and an organic 5 polymer to inhibit corrosion. The invention also relates to the water apparatus made from the method.
~3~C~GROI~ND OF THE INVENTION
1. FielA of the Invention:
The present invention relates to a method for ; treating a water apparatus with nickel and an organic 5 polymer to inhibit corrosion. The invention also relates to the water apparatus made from the method.
2. Description of the Prior Art:
Soft or hard, alkaline or acid, water is the enemy of water systems. Industrial pressure vessels full of 10 water contain pressures up to 150 psi. Consequently, steel water equipment currently offers the greatest strength at the lowest cost. Water and its impurities corrode water equipment, especially steel equipment used in water heating systems. Over time, rust forms and eats 15 through the steel. Heat, acidity and alkalinity accelerate corrosion.
!
Many commercial, industrial and institutional enterprises use large quantities of hot water. To ~ produce a ready supply of hot water on demand, water must 3 20 be heated and stored, often at very hot temperatures.
Hospitals, restaurants and hotels, for example, use large , quantities of hot water to sanitize their dishes and ; linens.
Some members of the industry line hot water `~ 25 equipment with porcelain enamel, also known as glass I lined. The porcelain enamel is porous, water soluble and prone to erosion. Residential porcelain enamel tanks tend to fail within three to five years when subjected to the continuously rigorous hot water requirements of 30 commercial systems. Upon tank failure, the users throw ¦ away the tanks.
'I
1, 2 1 ~
`' Others use cement-lined equipment. Cement-lining provides even less long-term protection than porcelain enamel and requires unacceptable thicknesses, maintenance and replacement costs. The lining is extremely prone to ;5 erosion and requires expensive periodic servicing to replac~ lost material. Acid and alkaline waters require ~ two different types of cement. Given the unpredictable ; qualities of water, the alkaline lining may end up in a tank holding acidic waters.
:"
;` 10 Applicant has discovered that nickel plating steel water equipment effectively protects the steel from corrosion. Electroless plated nickel chemically bonds to steel, thus forming a non-ferrous, durable and corrosion `i resistant shield on the surfaces. Nickel plating, however, has not been approved for use with potable water ~! systems as a stand alone coating. Nickel must be overcoated with an approved organic coating, such as plastic.
, .
Plastic linings also protect steel from corrosion.
Although these linings readily attach to steel, they do not readily attach to nickel using prior art methods. As a result, adhesion of organic coatings over electroless nickel has proven unreliable. ~ -..
~I An object of the invention is to provide a method to ``I25 produce a water apparatus with enhanced corrosion resistance. The method is used to coat or line the water apparatus's water exposed, nickel interior with a `~.corrosion resistant, organic polymer. This method of the invention provides a durable organic polymeric lining that is approved for use with potable water systems.
. ~
.~'`i .
".,~,~
, ., ~:i .~.. '' ,: .
2 ~ 3 .
8U~MARY OF THE INvEN~ION
The method of the invention reduces the water caused corrosion of the interior of a water apparatus by coating the interior with an organic polymer. A water apparatus, such as a water heater tank or boiler, has a nickel, water exposed surface that is coated with an organic polymer formulated for use with high temperature water.
The coated apparatus is heated for the polymer to permanently adhere to the apparatus.
; 10 In the preferred method of the invention, a steel water apparatus is electroless plated with nickel in a -j bath using chemical reduction. For apparatus with sufficiently large openings, the nickel plate on the interior surface of the article is grit-blasted with a particulate material to roughen the interior. A primer coating of a phenolic resin mixture is applied to the roughened nickel surface by using an airless spray system. Next, a powdered thermoplastic resin, most preferably nylon-11, is electrostatically applied over the primer to coat the surface. After resin application, ~ the resin bakes in an oven at a bare metal temperature j equal to the resin melt stage, about 430F for nylon-11.
`1 The invention also relates to a water apparatus with an increased resistance to the water caused corrosion of its interior. The apparatus has a water exposed, nickel ~¦ surface coated with an organic polymer formulated for use `l with high temperature water and permanently attached to ! the nickel surface.
~I
I A preferred water apparatus, has a water holding, ¦30 steel container, such as a water heater tank. The steel container has a water exposed, nickel plated surface. A
1plastic coating covers this surface by permanently ¦adhering to the surface. Means exist for adding and 1~
:
; removing water from the article, for instance, intake and ; outtake ports.
Additional effects, features and advantages will be apparent in the written description that follows.
~ 5 BRIEF DESCRIPTION OF THE DRAWING8 ,~l Figure 1 is a cut-away view of a vertical closed , chamber water heater prepared from one of the methods of the invention;
igure 2 is a cut-away view of a water heater tank l 10 prepared from one of the methods of the invention.
',''', ; :
i, .
' ,:
,. ~
~!
~ ~:
., .
~. ' ~, , .
1-'' .
.~, .
'sS~.,'~ ' ' ' ' ., . .~ . ~ i : `
211~
., .
DETAILED DESCRIPTION OF THE IN~ENTION
Applicant's invention treats a water apparatus to reduce water caused corrosion. The method covers water exposed, nickel portions of the water apparatus with an organic polymer coating.
A water apparatus, preferably a boiler, a water heating tank, water heater and the liXe, has a nickel surface that is exposed to water. Preferably, an - electroless nickel plating is applied to a metal water apparatus, more preferably a steel water apparatus. The conditions used in the preferred electroless nickel plating are for chemical reduction in a plating bath and are found in Brenner, et al., U.S. Patent No. 2,532,283, the disclosure of which is incorporated herein by ~, `~ 15 reference. After completing all welding, the apparatus is submerged in a plating bath of nickel in solution.
,;j ~9 The nickel plating should completely cover the water exposed steel surface.
!
A layer of organic polymer is applied to the nickel surface. This organic polymer is any organic polymer I formulat~ed for high temperature water usage. High ;` temperature water usage requires the polymer to remain inert in water, to withstand high pressure loads, to `l resist abrasion and to permanently adhere to the nickel ';I
surface to form a nonporous coating that neither degrades nor becomes brittle over time after repeated or continuous exposure to high water temperatures. High water temperatures are temperatures above about 140F and are less than the softening or melting point of the organic polymer. High pressure loads can equal hundreds of pounds of pressure while heating large volumes of water in a water heater tank. The organic polymer is preferably approved by Underwriters Laboratories for use with potable water.
~' ,ii -` ' 21~4g~8 -- G --The organic polymer can be applied using any method ~ ¦
that evenly coats the nickel surface at a minimum thickness of about 0.010 to 0.012 inch prior to heating.
The polymer application should use a method that forms a coating with no pinholes. If a liquid organic polymer is used, it is preferably applied by slush coating. If a powdered resin is used, it should be applied after roughening and primer coating.
The organic polymer is next heated, preferably by baking in an oven. During heating, the polymer permanently adheres to the nickel surface by curing or fusing. Thermosetting polymers should bake at their cure temperature. Thermoplastic polymers should bake at a temperature above the melt stage temperature.
~ 15 A liquid, organic, polymer coating is preferred for ! water apparatus with openings too small to adequately use a powdered resin to form an even coat, such as the vertical closed chamber shown in Figure 1. Preferably, a two-component, liquid, organic polymer solution, most preferably a liquid fluorocarbon resin with a crosslinker i in a solvent, for example KYNAR~ available from Pennwalt ~-I Corp. or Water Heater Blue available from ~Whittaker Coating, Batavia Division, Batavia, Illinois (code 842 B
2), is slush coated onto a nickel surface after completing all welding. The slush coat is applied in a ~ sufficient amount to evenly coat the surface and the I apparatus openings are plugged. The water apparatus ' rotates and/or rocks at room temperature to evenly j disperse the liquid polymer. Excess liquid polymer can 1 30 be poured off. The polymer is next cured for about 15 ¦ minutes at 475F.
A powdered organic polymer is preferred for a water apparatus with a sufficiently large opening, such as a water ~eater tank shown in ~igur- 2. The term .
2 1 ~ 3 .~
"sufficiently large opening" refers to an opening in the apparatus that is large enough to allow the even coating of a powdered organic polymer.
-When applying a powdered organic polymer, the following steps are preferred. The water exposed, nicXel - surface of this apparatus is next roughened. The surface can be roughened using any method known in the art that forms an anchor profile to which the organic polymer ;iattaches and removes surface contaminants, especially the oxide films that form on the nickel surface. Preferably, the surface is grit-blasted by sandblasting with a .particulate material to a depth of about 0.001 inch. The ~`material is preferably a mixture of mineral sands that are primarily ferrous aluminum silicate and commonly found in Staurolite products, such as STARBLAST~
available from E.I. du Pont de Nemours ~ Co., Wilmington, Delaware. If desired, the roughened surface can be ;;lcleaned using any method known in the art that removes excess particulate material and does not form an oxide film on the nickel.
Preferably, a coating of primer is applied to the roughened nickel surface. This primer can be any prep coating known in the art that attaches to a nickel surface and promotes the attachment or adhesion of an organic polymer coating to the nickel surface.
Preferably, the primer is a prep coating that is applied after completing all welding and prior to electrostatic coating of the organic polymer, more preferably, using a conventional, airless, spray system. Preferably, the primer is a phenolic resin. The preferred phenolic resin is a phenolic resin mixture with the following formulation: <36% phenolic resin with <6% vinyl acetal polymers; 4-5% chromic acid, zinc salt; <10% methoxy propanol; 20-22% n-butanol; 24-26% xylene and <1%
additives and is available from Elf Atochem North . :
; ~
2 i ~ 4 8 ~ ~
America, Inc., Birdsboro, Pennsylvania (catalog number PRIMER P 204 A).
A layer of a powdered organic polymer is applied to coat the apparatus's roughened surface, preferably over a primer. The selected organic polymer is preferably thermoplastic, such as polyvinyl chloride, fluoroplastic polymers, nylon, and the like. Nylons, such as nylon-9, nylon-11 and nylon-12, and the like, are more preferred.
Nylon-11 or RILSAN~ which is available from Elf Atochem North America, Inc. (catalog number 1464 White EC ES), is most preferred.
~,. , ; The powdered organic polymer should be applied to ; the surface with an even coating at a minimum thickness of about 0.010 to 0.012 inch. Since the polymer application follows a method that forms a coating with no pinholes, applying a powdered organic polymer by electrostatic deposition is most preferred. More preferably, the powder particle size is between about 35-40 ~m to allow maximum electrostatic deposition behind hidden areas. For electrostatic deposition, individual ~1particles of polymer powder are statically charged and applied to the water exposed surface, preferably at ambient temperatures. A specially designed gun charges these powder particles. The apparatus connects to the opposite terminal and an electrostatic field thus forms between the gun and the nickel surface. Compressed air shoots the charged particles out of the gun. The grounded apparatus attracts the charged particles which deposit on the roughened surface. Deposited particles 0 insulate the nickel apparatus and repel additional powder to ensure a uniform polymer coating.
The organic polymer then heats to permanently adhere to the nickel surface. Preferably, the thermoplastic ~coated apparatus bakes in an oven until the base ~etal is Y, ' -:
~ , .,.,. .. , ., .. , ~ ... . .
; 21~8~
above the polymer's melt stage temperature. For a nylon-ll polymer, the apparatus preferably bakes at about 430F for 15 minutes.
Turning now to the figures, the figures illustrate a vertical chamber enclosed vessel and a water heater ; tank coated by one of the methods of the~ invention.
Figure 1 is a cut-away view showing a vertical chamber , enclosed vessel composed of a water heater 10 with a steel, water holding container 12 and a power g s heater 1~. A crosslinked, fluorocarbon coat 16 covers the water , holding container's interior surface 18. Electroless ' nickel plating 20 completely covers the steel.
Figure 2 is a cut-away view of a water heater tank -~.
22 produced using a method of the invention. The steel tank 22 has a water holding interior surface 2~. A
`i nylon-11 coat 26 adheres to the interior surface 2~ and covers the electroless nickel plating 28 that was deposited over the steel 30.
The method of the invention produces water apparatus that has enhanced corrosion resistance to water. The method of the invention coats the nickel, water exposed interior of water apparatus with a corrosion resistant, organic polymer. The method uses a durable, organic, polymeric lining that is preferably approved for use with potable water systems.
While the invention is shown in only one of its forms, it is not thus limited but is susceptible to various changes and modifications without departing from ~ the spirit and scope of the invention.
`l :
!J
, .
.~
Soft or hard, alkaline or acid, water is the enemy of water systems. Industrial pressure vessels full of 10 water contain pressures up to 150 psi. Consequently, steel water equipment currently offers the greatest strength at the lowest cost. Water and its impurities corrode water equipment, especially steel equipment used in water heating systems. Over time, rust forms and eats 15 through the steel. Heat, acidity and alkalinity accelerate corrosion.
!
Many commercial, industrial and institutional enterprises use large quantities of hot water. To ~ produce a ready supply of hot water on demand, water must 3 20 be heated and stored, often at very hot temperatures.
Hospitals, restaurants and hotels, for example, use large , quantities of hot water to sanitize their dishes and ; linens.
Some members of the industry line hot water `~ 25 equipment with porcelain enamel, also known as glass I lined. The porcelain enamel is porous, water soluble and prone to erosion. Residential porcelain enamel tanks tend to fail within three to five years when subjected to the continuously rigorous hot water requirements of 30 commercial systems. Upon tank failure, the users throw ¦ away the tanks.
'I
1, 2 1 ~
`' Others use cement-lined equipment. Cement-lining provides even less long-term protection than porcelain enamel and requires unacceptable thicknesses, maintenance and replacement costs. The lining is extremely prone to ;5 erosion and requires expensive periodic servicing to replac~ lost material. Acid and alkaline waters require ~ two different types of cement. Given the unpredictable ; qualities of water, the alkaline lining may end up in a tank holding acidic waters.
:"
;` 10 Applicant has discovered that nickel plating steel water equipment effectively protects the steel from corrosion. Electroless plated nickel chemically bonds to steel, thus forming a non-ferrous, durable and corrosion `i resistant shield on the surfaces. Nickel plating, however, has not been approved for use with potable water ~! systems as a stand alone coating. Nickel must be overcoated with an approved organic coating, such as plastic.
, .
Plastic linings also protect steel from corrosion.
Although these linings readily attach to steel, they do not readily attach to nickel using prior art methods. As a result, adhesion of organic coatings over electroless nickel has proven unreliable. ~ -..
~I An object of the invention is to provide a method to ``I25 produce a water apparatus with enhanced corrosion resistance. The method is used to coat or line the water apparatus's water exposed, nickel interior with a `~.corrosion resistant, organic polymer. This method of the invention provides a durable organic polymeric lining that is approved for use with potable water systems.
. ~
.~'`i .
".,~,~
, ., ~:i .~.. '' ,: .
2 ~ 3 .
8U~MARY OF THE INvEN~ION
The method of the invention reduces the water caused corrosion of the interior of a water apparatus by coating the interior with an organic polymer. A water apparatus, such as a water heater tank or boiler, has a nickel, water exposed surface that is coated with an organic polymer formulated for use with high temperature water.
The coated apparatus is heated for the polymer to permanently adhere to the apparatus.
; 10 In the preferred method of the invention, a steel water apparatus is electroless plated with nickel in a -j bath using chemical reduction. For apparatus with sufficiently large openings, the nickel plate on the interior surface of the article is grit-blasted with a particulate material to roughen the interior. A primer coating of a phenolic resin mixture is applied to the roughened nickel surface by using an airless spray system. Next, a powdered thermoplastic resin, most preferably nylon-11, is electrostatically applied over the primer to coat the surface. After resin application, ~ the resin bakes in an oven at a bare metal temperature j equal to the resin melt stage, about 430F for nylon-11.
`1 The invention also relates to a water apparatus with an increased resistance to the water caused corrosion of its interior. The apparatus has a water exposed, nickel ~¦ surface coated with an organic polymer formulated for use `l with high temperature water and permanently attached to ! the nickel surface.
~I
I A preferred water apparatus, has a water holding, ¦30 steel container, such as a water heater tank. The steel container has a water exposed, nickel plated surface. A
1plastic coating covers this surface by permanently ¦adhering to the surface. Means exist for adding and 1~
:
; removing water from the article, for instance, intake and ; outtake ports.
Additional effects, features and advantages will be apparent in the written description that follows.
~ 5 BRIEF DESCRIPTION OF THE DRAWING8 ,~l Figure 1 is a cut-away view of a vertical closed , chamber water heater prepared from one of the methods of the invention;
igure 2 is a cut-away view of a water heater tank l 10 prepared from one of the methods of the invention.
',''', ; :
i, .
' ,:
,. ~
~!
~ ~:
., .
~. ' ~, , .
1-'' .
.~, .
'sS~.,'~ ' ' ' ' ., . .~ . ~ i : `
211~
., .
DETAILED DESCRIPTION OF THE IN~ENTION
Applicant's invention treats a water apparatus to reduce water caused corrosion. The method covers water exposed, nickel portions of the water apparatus with an organic polymer coating.
A water apparatus, preferably a boiler, a water heating tank, water heater and the liXe, has a nickel surface that is exposed to water. Preferably, an - electroless nickel plating is applied to a metal water apparatus, more preferably a steel water apparatus. The conditions used in the preferred electroless nickel plating are for chemical reduction in a plating bath and are found in Brenner, et al., U.S. Patent No. 2,532,283, the disclosure of which is incorporated herein by ~, `~ 15 reference. After completing all welding, the apparatus is submerged in a plating bath of nickel in solution.
,;j ~9 The nickel plating should completely cover the water exposed steel surface.
!
A layer of organic polymer is applied to the nickel surface. This organic polymer is any organic polymer I formulat~ed for high temperature water usage. High ;` temperature water usage requires the polymer to remain inert in water, to withstand high pressure loads, to `l resist abrasion and to permanently adhere to the nickel ';I
surface to form a nonporous coating that neither degrades nor becomes brittle over time after repeated or continuous exposure to high water temperatures. High water temperatures are temperatures above about 140F and are less than the softening or melting point of the organic polymer. High pressure loads can equal hundreds of pounds of pressure while heating large volumes of water in a water heater tank. The organic polymer is preferably approved by Underwriters Laboratories for use with potable water.
~' ,ii -` ' 21~4g~8 -- G --The organic polymer can be applied using any method ~ ¦
that evenly coats the nickel surface at a minimum thickness of about 0.010 to 0.012 inch prior to heating.
The polymer application should use a method that forms a coating with no pinholes. If a liquid organic polymer is used, it is preferably applied by slush coating. If a powdered resin is used, it should be applied after roughening and primer coating.
The organic polymer is next heated, preferably by baking in an oven. During heating, the polymer permanently adheres to the nickel surface by curing or fusing. Thermosetting polymers should bake at their cure temperature. Thermoplastic polymers should bake at a temperature above the melt stage temperature.
~ 15 A liquid, organic, polymer coating is preferred for ! water apparatus with openings too small to adequately use a powdered resin to form an even coat, such as the vertical closed chamber shown in Figure 1. Preferably, a two-component, liquid, organic polymer solution, most preferably a liquid fluorocarbon resin with a crosslinker i in a solvent, for example KYNAR~ available from Pennwalt ~-I Corp. or Water Heater Blue available from ~Whittaker Coating, Batavia Division, Batavia, Illinois (code 842 B
2), is slush coated onto a nickel surface after completing all welding. The slush coat is applied in a ~ sufficient amount to evenly coat the surface and the I apparatus openings are plugged. The water apparatus ' rotates and/or rocks at room temperature to evenly j disperse the liquid polymer. Excess liquid polymer can 1 30 be poured off. The polymer is next cured for about 15 ¦ minutes at 475F.
A powdered organic polymer is preferred for a water apparatus with a sufficiently large opening, such as a water ~eater tank shown in ~igur- 2. The term .
2 1 ~ 3 .~
"sufficiently large opening" refers to an opening in the apparatus that is large enough to allow the even coating of a powdered organic polymer.
-When applying a powdered organic polymer, the following steps are preferred. The water exposed, nicXel - surface of this apparatus is next roughened. The surface can be roughened using any method known in the art that forms an anchor profile to which the organic polymer ;iattaches and removes surface contaminants, especially the oxide films that form on the nickel surface. Preferably, the surface is grit-blasted by sandblasting with a .particulate material to a depth of about 0.001 inch. The ~`material is preferably a mixture of mineral sands that are primarily ferrous aluminum silicate and commonly found in Staurolite products, such as STARBLAST~
available from E.I. du Pont de Nemours ~ Co., Wilmington, Delaware. If desired, the roughened surface can be ;;lcleaned using any method known in the art that removes excess particulate material and does not form an oxide film on the nickel.
Preferably, a coating of primer is applied to the roughened nickel surface. This primer can be any prep coating known in the art that attaches to a nickel surface and promotes the attachment or adhesion of an organic polymer coating to the nickel surface.
Preferably, the primer is a prep coating that is applied after completing all welding and prior to electrostatic coating of the organic polymer, more preferably, using a conventional, airless, spray system. Preferably, the primer is a phenolic resin. The preferred phenolic resin is a phenolic resin mixture with the following formulation: <36% phenolic resin with <6% vinyl acetal polymers; 4-5% chromic acid, zinc salt; <10% methoxy propanol; 20-22% n-butanol; 24-26% xylene and <1%
additives and is available from Elf Atochem North . :
; ~
2 i ~ 4 8 ~ ~
America, Inc., Birdsboro, Pennsylvania (catalog number PRIMER P 204 A).
A layer of a powdered organic polymer is applied to coat the apparatus's roughened surface, preferably over a primer. The selected organic polymer is preferably thermoplastic, such as polyvinyl chloride, fluoroplastic polymers, nylon, and the like. Nylons, such as nylon-9, nylon-11 and nylon-12, and the like, are more preferred.
Nylon-11 or RILSAN~ which is available from Elf Atochem North America, Inc. (catalog number 1464 White EC ES), is most preferred.
~,. , ; The powdered organic polymer should be applied to ; the surface with an even coating at a minimum thickness of about 0.010 to 0.012 inch. Since the polymer application follows a method that forms a coating with no pinholes, applying a powdered organic polymer by electrostatic deposition is most preferred. More preferably, the powder particle size is between about 35-40 ~m to allow maximum electrostatic deposition behind hidden areas. For electrostatic deposition, individual ~1particles of polymer powder are statically charged and applied to the water exposed surface, preferably at ambient temperatures. A specially designed gun charges these powder particles. The apparatus connects to the opposite terminal and an electrostatic field thus forms between the gun and the nickel surface. Compressed air shoots the charged particles out of the gun. The grounded apparatus attracts the charged particles which deposit on the roughened surface. Deposited particles 0 insulate the nickel apparatus and repel additional powder to ensure a uniform polymer coating.
The organic polymer then heats to permanently adhere to the nickel surface. Preferably, the thermoplastic ~coated apparatus bakes in an oven until the base ~etal is Y, ' -:
~ , .,.,. .. , ., .. , ~ ... . .
; 21~8~
above the polymer's melt stage temperature. For a nylon-ll polymer, the apparatus preferably bakes at about 430F for 15 minutes.
Turning now to the figures, the figures illustrate a vertical chamber enclosed vessel and a water heater ; tank coated by one of the methods of the~ invention.
Figure 1 is a cut-away view showing a vertical chamber , enclosed vessel composed of a water heater 10 with a steel, water holding container 12 and a power g s heater 1~. A crosslinked, fluorocarbon coat 16 covers the water , holding container's interior surface 18. Electroless ' nickel plating 20 completely covers the steel.
Figure 2 is a cut-away view of a water heater tank -~.
22 produced using a method of the invention. The steel tank 22 has a water holding interior surface 2~. A
`i nylon-11 coat 26 adheres to the interior surface 2~ and covers the electroless nickel plating 28 that was deposited over the steel 30.
The method of the invention produces water apparatus that has enhanced corrosion resistance to water. The method of the invention coats the nickel, water exposed interior of water apparatus with a corrosion resistant, organic polymer. The method uses a durable, organic, polymeric lining that is preferably approved for use with potable water systems.
While the invention is shown in only one of its forms, it is not thus limited but is susceptible to various changes and modifications without departing from ~ the spirit and scope of the invention.
`l :
!J
, .
.~
Claims (28)
1. A method of treating a water apparatus, the method comprising the steps of:
providing the water apparatus having a water exposed surface of nickel;
applying an organic polymer coating to the water exposed surface of nickel, wherein the organic polymer is formulated for use with high temperature water; and heating the organic polymer layer.
providing the water apparatus having a water exposed surface of nickel;
applying an organic polymer coating to the water exposed surface of nickel, wherein the organic polymer is formulated for use with high temperature water; and heating the organic polymer layer.
2. The method of claim 1, wherein the organic polymer is a thermosetting resin.
3. The method of claim 2, wherein the thermosetting resin is heated at the cure temperature.
4. The method of claim 1, wherein the organic polymer is a thermoplastic resin.
5. The method of claim 4, wherein the thermoplastic resin is selected from the group consisting of:
polyvinyl chloride, fluoroplastic polymers, and nylon.
polyvinyl chloride, fluoroplastic polymers, and nylon.
6. The method of claim 5, wherein the thermoplastic resin is nylon-11.
7. The method of claim 4, wherein the thermoplastic resin is heated at the melt stage temperature of the organic polymer.
8. A method of treating a water apparatus, the method comprising the steps of:
providing the water apparatus having a water exposed surface of nickel;
roughening the water exposed surface of nickel;
applying an organic polymer coating to the roughened water exposed surface of nickel, wherein the organic polymer is formulated for use with high temperature water; and heating the organic polymer layer.
providing the water apparatus having a water exposed surface of nickel;
roughening the water exposed surface of nickel;
applying an organic polymer coating to the roughened water exposed surface of nickel, wherein the organic polymer is formulated for use with high temperature water; and heating the organic polymer layer.
9. A method of treating a water apparatus, the method comprising the steps of:
providing the water apparatus having a water exposed surface of nickel;
roughening the water exposed surface of nickel;
applying a primer coating to the roughened nickel surface;
applying an organic polymer coating over the primer coating, wherein the organic polymer is formulated for use with high temperature potable water; and heating the organic polymer layer.
providing the water apparatus having a water exposed surface of nickel;
roughening the water exposed surface of nickel;
applying a primer coating to the roughened nickel surface;
applying an organic polymer coating over the primer coating, wherein the organic polymer is formulated for use with high temperature potable water; and heating the organic polymer layer.
10. The method of claim 9, wherein the organic polymer is a thermoplastic resin.
11. The method of claim 10, wherein the thermoplastic resin is selected from the group consisting of:
polyvinyl chloride, fluoroplastic polymers, and nylon.
polyvinyl chloride, fluoroplastic polymers, and nylon.
12. The method of claim 11, wherein the thermoplastic resin is nylon-11.
13. The method of claim 9, wherein the organic polymer is heated at the melt stage temperature of the organic polymer.
- ?? -
- ?? -
14. A method of treating a water apparatus, the method comprising the steps of:
providing the water apparatus having a water exposed surface of nickel;
roughening the water exposed surface of nickel;
applying a primer coating to the roughened nickel surface;
applying a powdered resin coating over the primer, wherein the resin is formulated for use with high temperature potable water; and heating the resin layer.
providing the water apparatus having a water exposed surface of nickel;
roughening the water exposed surface of nickel;
applying a primer coating to the roughened nickel surface;
applying a powdered resin coating over the primer, wherein the resin is formulated for use with high temperature potable water; and heating the resin layer.
15. A method of treating a steel water apparatus, the method comprising the steps of:
providing the steel water apparatus having a water exposed surface;
plating with nickel the water exposed surface of the apparatus;
blasting with particulate matter the nickel plated, water exposed surface for roughening the surface;
applying a primer coating to the roughened nickel surface;
applying electrostatically a powdered resin coating over the primer, wherein the resin is formulated for use with high temperature potable water; and heating the resin layer.
providing the steel water apparatus having a water exposed surface;
plating with nickel the water exposed surface of the apparatus;
blasting with particulate matter the nickel plated, water exposed surface for roughening the surface;
applying a primer coating to the roughened nickel surface;
applying electrostatically a powdered resin coating over the primer, wherein the resin is formulated for use with high temperature potable water; and heating the resin layer.
16. The method of claim 15, wherein the resin is a thermoplastic resin.
17. The method of claim 16, wherein the thermoplastic resin is selected from the group consisting of:
polyvinyl chloride, fluoroplastic polymers, and nylon.
polyvinyl chloride, fluoroplastic polymers, and nylon.
18. The method of claim 17, wherein the thermoplastic resin is nylon-11.
19. The method of claim 15, wherein the resin is heated at a bare metal temperature of the apparatus at the melt stage temperature of the resin.
20. The method of claim 18, wherein the nylon-11 is heated at a bare metal temperature of the apparatus at about 430°F.
21. A water apparatus comprising:
a water exposed, nickel surface; and an organic polymer coating that covers the water exposed, nickel surface, wherein the organic polymer coating is formulated for use at high water temperatures and permanently adheres to the nickel surface.
a water exposed, nickel surface; and an organic polymer coating that covers the water exposed, nickel surface, wherein the organic polymer coating is formulated for use at high water temperatures and permanently adheres to the nickel surface.
22. A water apparatus comprising:
a water holding, steel container having a water exposed, electroless nickel plated surface;
a plastic coating that covers the water exposed, electroless nickel plated surface, wherein the plastic coating is formulated for use at high water temperatures of potable water and permanently adheres to the nickel surface; and means for adding and removing water from the water holding container.
a water holding, steel container having a water exposed, electroless nickel plated surface;
a plastic coating that covers the water exposed, electroless nickel plated surface, wherein the plastic coating is formulated for use at high water temperatures of potable water and permanently adheres to the nickel surface; and means for adding and removing water from the water holding container.
23. The apparatus of claim 22, wherein the water apparatus is a water heater.
24. The apparatus of claim 22, wherein the water apparatus is a water tank.
25. The apparatus of claim 22, wherein the water apparatus is a boiler.
26. The apparatus of claim 22, wherein the plastic coating is thermoplastic.
27. The apparatus of claim 26, wherein the plastic coating is selected from the group consisting of:
polyvinyl chloride, fluoroplastic polymers, and nylon.
polyvinyl chloride, fluoroplastic polymers, and nylon.
28. The apparatus of claim 27, wherein the plastic coating is nylon-11.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1307593A | 1993-02-03 | 1993-02-03 | |
| US013,075 | 1993-02-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2114858A1 true CA2114858A1 (en) | 1994-08-04 |
Family
ID=21758175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2114858 Abandoned CA2114858A1 (en) | 1993-02-03 | 1994-02-03 | Nickel-organic polymer coating method and water apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2114858A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11054173B2 (en) | 2017-12-06 | 2021-07-06 | A. O. Smith Corporation | Water heater with organic polymer coating |
-
1994
- 1994-02-03 CA CA 2114858 patent/CA2114858A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11054173B2 (en) | 2017-12-06 | 2021-07-06 | A. O. Smith Corporation | Water heater with organic polymer coating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5238749A (en) | Antimicrobial coating process and product | |
| AU784020B2 (en) | Marine coating | |
| US3140195A (en) | Process for providing a coated surface | |
| CA2375681C (en) | Coating method and coating mixture | |
| EP1368190A1 (en) | Corrosion resistant coating giving polished effect | |
| US4255462A (en) | Method of producing polyvinylidene fluoride coatings | |
| WO2002087339A1 (en) | Antimicrobial powder coated metal sheet | |
| JP3075117B2 (en) | Painted metal plate for sliding plate and method for producing the same | |
| US4540637A (en) | Process for the application of organic materials to galvanized metal | |
| CA2196255A1 (en) | Non-stick coating for aluminium cooking vessels | |
| CA2114858A1 (en) | Nickel-organic polymer coating method and water apparatus | |
| SK386092A3 (en) | Multilayer coat, method of its manufacture and use | |
| US20060000183A1 (en) | Method and apparatus for anticorrosive coating | |
| CN105312215A (en) | Water heater water tank inner container fluororesin coating corrosion preventing method | |
| MXPA02001903A (en) | Leach protective coatings for water meter components. | |
| US7820239B2 (en) | Method of manufacturing iron member | |
| WO2016110840A1 (en) | Corrosion-resistant valve disc | |
| US6562467B2 (en) | Corrosion and UV resistant article and process for electrical equipment | |
| JP6948583B2 (en) | Resin molded body | |
| US4471109A (en) | Polyester powdered paint | |
| CN1333003C (en) | Self-adhering powder paint based on polyamide and silane for metal coating | |
| JPH0486254A (en) | Resin coated metallic body | |
| US20230220945A1 (en) | Coated cast iron pipe or fitting for use in aggressive environments | |
| JP3161572B2 (en) | piping material | |
| CN113801548B (en) | Desulfurization and corrosion prevention local repairing material for thermal power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |