Cathodic Protection Wiring Diagram

For added protection against corrosive gases and brackish water a halar ectfe or kynar pvdf insulation covered by an hmwpe jacket can be used. A simple method of protection connects the metal to be protected to a more easily corroded sacrificial metal to act as the anode the sacrificial metal then corrodes instead of the protected metal. Installation inspections shall be conducted by the electrical supervisors and witnessed by qc electrical inspector.

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All material received at site shall be inspected handled and stored upon receipt in accordance with project procedure for field material control.

Cathodic protection wiring diagram. The impressed current system. Progressing and to determine the level of cathodic protection cp being provided by a cathodic protection system. Cathodic protection cable cp cable or cpc is usually a stranded conductor insulated with hmwpe. In 1824 davy presented a series of papers to the royal society in london 1 in which he described how zinc and iron anodes could be used to prevent the corro sion of copper sheathing on the wooden hulls of british naval vessels.

Tidal zone cathodic protection mhw mlw steel pile galvanic or impressed current anodes tidal zone structure section cathodic protection is afforded to steel in tidal zone during periods of high tides. Cathodic protection cp is a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. There are two general methods of cathodic protection the galvanic system and. October 2009 impressed current cathodic protection rectifier design for safety guideline ii a basic description of how cathodic protection systems work and the main components of cathodic protection rectifiers some essential information to help the user interpret and apply the recommendations found in this guideline.

However his role in the applica tion of cathodic protection should not be ignored. Procedure for installation of cathodic protection system. Cathodic protection is a proven corrosion control method for protection of underground and undersea metallic structures such as oil and gas pipelines cables utility lines and structural foundations. Cathodic protection is a means of reducing corrosion of a metal by artificially.

Used in cathodic protection systems they protect steel water or fuel pipelines and storage tanks steel pier piles ships offshore oil platforms and onshore oil well casings from corrosion. The system requires electrical continuity of the structure and between the structure and test stations to determine structure to electrolyte potentials. The galvanic system uses a sacrificial anode of a material having a higher potential on the electromotive series than the material to be protected fig. We supply the corrosion control and cathodic protection industries with various cp cables.

Cathodic protection is now widely applied in the protection of oil.