Cathodic protection system

Claim 2

An anode apparatus for automotive cathodic protection devices, comprising: (a) a layer spread upon a bare metal surface wherein said surface has a hole extending therethrough for receiving a fastener; (b) a substantially carbon anode mounted on said layer and having a hole extending therethrough for receiving a fastener, said anode being composed of sintered material and, comprising about 90-99% carbon about 1-9% silica gel, and about 0.1-1% inert binders (c) an electric lead attached to said anode; (d) a plastic threaded fastener extending through said holes, whereby said anode with the lead is held fast to said surface.

Claim 3

The apparatus of claim 1 wherein said fastener further comprises a plastic nut for receiving said fastener in threaded engagement, said nut located on a back side of said surface.

Claim 4

The apparatus of claim 2 wherein said layer further comprises about 41% H 2 O, about 24% polyvinyl acetate-acrylic resin, about 23% calcium silicate pigment, about 4% sodium silicate stabilizer, about 3% of a 10% solution of H 2 PO 3 , about 3% of a 10% solution of tannic acid, about 1.5% glycol esters and about 0.5% inert material.

Claim 5

The apparatus of claim 1 wherein said anode is about 5/16ths of an inch thick.

Claim 6

The apparatus of claim 4 wherein said fastener is composed of a polyamide.

Claim 7

The apparatus of claim 5 wherein said lead has a ring connector through which said fastener is received, whereby said lead is held fast to a surface of said anode.

Claim 8

An anode apparatus for automotive cathodic protection devices, comprising: (a) a layer of liquid spread upon a bare metal surface, wherein said surface has a hole extending therethrough for receiving a fastener, and wherein said liquid is about 41% H 2 O, about 24% polyvinyl acetate-acrylic resin, about 23% calcium silicate pigment, about 4% sodium silicate stabilizer, about 3% of a 10% solution of H 2 PO 3 , about 3% of a 10% solution of tannic acid, about 1.5% glycol ester and about 0.5% inert material; (b) a substantially carbon anode mounted on said layer and having a hole extending therethrough for receiving a fastener, wherein said anode further comprises about 90-99% carbon, about 1-9% silica gel, and about 0.1-1% inert binders; (c) an electric lead attached to said anode, wherein said electric lead has a ring connector through which said fastener may be received, whereby said fastener is held fast to a surface of said anode; (d) a plastic threaded fastener extending through said hole, whereby said anode with the lead is held fast to said surface, said plastic fastener further comprising a plastic nut for receiving said threaded fastener in threaded engagement, said nut located on a back side of said surface, and wherein said plastic threaded fastener and nut is composed of a polyamide.

Claim 9

An anode apparatus for automotive cathodic protection devices, comprising: (a) a layer of liquid spread upon a bare metal surface, wherein said surface has a hole extending therethrough for receiving a fastener, and wherein said liquid is about 41% H 2 O, about 24% polyvinyl acetate-acrylic resin, about 23% calcium silicate pigment, about 4% sodium silicate stabilizer, about 3% of a 10% solution of H 2 PO 3 , about 3% of a 10% solution of tannic acid, about 1.5% glycol ester and about 0.5% inert material; (b) a substantially carbon anode mounted on said layer and having a hole extending therethrough for receiving a fastener, wherein said anode further comprises about 90-99% carbon, about 1-9% silica gel, and about 0.1-1% inert binders; (c) an electric lead attached to said anode, wherein said electric lead has a ring connector through which said fastener may be received, whereby said fastener is held fast to a surface of said anode; (d) a plastic threaded fastener extending through said hole, whereby said anode with the lead is held fast to said surface, said plastic fastener further comprising a plastic nut for receiving said threaded fastener in threaded engagement, said nut located on a back side of said surface, and wherein said plastic threaded fastener and nut is composed of a polyamide.

Claim 10

The apparatus of claim 7 wherein said anode is composed of sintered material.

Claim 11

The apparatus of claim 8 wherein said anode is about 5/16th of an inch thick.

Claim 14

The method of claim 10 wherein said anode is composed of sintered material.

Claim 15

The method of claim 11 wherein said step of spreading a layer of liquid is carried out using a liquid comprising about 41% H 2 O, about 24% polyvinyl acetate-acrylic resin, about 23% calcium silicate pigments, about 4% sodium silicate stabilizer, about 3% of a 10% solution of H 2 PO 3 , about 3% of a 10% solution of tannic acid, about 1.5% glycol esters and about 0.5% inert material.

Claim 16

An anode apparatus for cathodic protection devices comprising a solid material having from about 90 to about 99 percent carbon and from about 1 to about 9 percent silica gel and from about 0.1 to about 1 percent inert binder.

Claim 17

An anode apparatus for cathodic protection devices comprising a solid material having from about 90 to about 99 percent carbon and from about 1 to about 9 percent silica gel and from about 0.1 to about 1 percent inert binder.

Claim 18

The apparatus of claim 13 wherein the components are sintered, combined homogeneously, evenly mixed and extruded as a high density compressed mass.

Claim 19

The apparatus of claim 13 wherein the carbon comprises about 98 percent, the silica gel comprises about 2 percent and the inert binder comprises about less than 1 percent of the anode.

Claim 20

The apparatus of claim 3 wherein the anode is about 5/16th of an inch thick and has a central opening extending therethrough and further comprising a connector ring, and a fastener extending through the connector ring and opening and a nut distally mounted on the fastener.

Claim 21

The apparatus of claim 13 wherein the anode has a bulk density of about 0.0625 pounds per cubic inch, a minimun grain size of about 0.035 inch, a specific resistance of about 0.00039 ohms per inch, a compression strength of about 5200 psi, a porosity of about 25 percent, a tensile strength of about 1800 psi and a thermal conductivity of about 0.25 BTUs per square foot sec. f.