Cathodic protection system

a protection system and cathode technology, applied in the field of cathode protection system, can solve the problems of unfavorable application life expectancy, titanium has/had historical technical limitations on voltage, and platinised niobium was not cost competitive, etc., to achieve easy installation, increase the life expectancy of the system, and provide a level of flexibility

Inactive Publication Date: 2015-03-12
ANODE ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0037]The above system utilizes inert anodes that do not galvanically corrode and increases the active zone of the anode, thus greatly increasing the life expectancy of the system over those systems currently known and in use. It is anticipated that the system of the present invention will have a life of at least 50 years. To accord with the anticipated life expectancy, the anode

Problems solved by technology

Silicon, iron (chromium), graphite and scrap steel were all potential materials but considered unlikely to have the desired life expectanc

Method used

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Embodiment Construction

[0044]Referring to FIG. 1, there is shown an impressed current cathodic protection system for steel (& cast iron?) structures (1) which comprises an inert mixed metal oxide (MMO) anode wire (2) surrounded by a zone of calcined petroleum coke (3) contained within a tubular sleeve (4) sealed at both ends (5) and connected via a cable tail (6) to a power supply. Preferably, the system is driven by a DC power supply, which in this embodiment is a sealed battery cell (not shown).

[0045]The system also has an output regulator (not shown) to control the flow of current to the target structure.

In this preferred form of the invention, the specification for the calcined petroleum coke is as follows:

[0046]Fixed carbon: 99.35%

[0047]Ash: 0.6%

[0048]Moisture: 0.05%

[0049]Volatiles: Nil at 950° C.

[0050]Bulk Density: 74 lbs. per cubic foot.

[0051]Predominantly round particles.

[0052]All particles surface modified for maximum electrical conductivity.

[0053]Particle Sizing: Dust free with a maximum particl...

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Abstract

An impressed current cathodic protection system for a target structure susceptible to corrosion (such as of steel or cast iron) which comprises an inert mixed metal oxide anode surrounded by a tightly packed conductive zone connected to a power supply source and having an input/output regulator to control the flow of current to the target structure. The present invention relates to device and method to provide personal and/or medical details of one or more individuals in the event of an emergency.

Description

FIELD OF THE INVENTION[0001]This invention relates to a cathodic protection system for steel structures (or cast iron) structures. This invention has particular application for cathodic protection of buried and submerged structures (on land and in marine off-shore applications). However, it is also be relevant for other types of structures in which steel (or iron) is a significant structural component.BACKGROUND OF THE INVENTION[0002]Steel structures are used widely in industrial structures and infrastructure due to its strength and tensile properties. However, corrosion is a major problem over time. The use of cathodic protection (CP) using sacrificial anode systems in order to inhibit corrosion of these structures is well known. Conventional sacrificial anode systems are fitted to industrial structures such as pipelines, above ground storage tanks, underground tanks, and many other structures sited on or buried in the ground. Typically, this is done by attaching a number of metal ...

Claims

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Application Information

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IPC IPC(8): C23F13/14C23F13/22
CPCC23F13/22C23F13/14C23F13/06C23F13/12C23F13/16C23F2213/22C23F2213/32
Inventor BURNS, WAYNE ALAN ROBERT
Owner ANODE ENG
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