Impressed Current Cathodic Protection Pipeline

Impressed current cathodic protection iccp systems have the benefit of an external power source to impose protective current.

Impressed current cathodic protection pipeline. Impressed current cathodic protection. The iccp system for the pipeline sections above hat consist of. Pipeline cathodic protection design for new pipelines may appear to be a rather easy task for anyone with a basic understanding of cathodic protection. Impressed current cathodic protection is a more economical method of cathodic protection when underground pipelines are offshore or long equipment is too large to protect via one or few galvanic anodes and electrons are supplied to the cathodic structure using an external dc power source.

Dc source can be a solar cell rectifier generator battery or some other dc power. An impressed current cathodic protection system iccp for a pipeline consists of a dc power source often an ac powered transformer rectifier and an anode or array of anodes buried in the ground the anode groundbed. Hazardous product pipelines are routinely protected by a coating supplemented with cathodic protection. Continuous cable like anodes parallel with the pipelines.

However as with all design efforts there are a wide number of factors that need to be considered for a sound design that meets generally accepted industry practices. Iccp systems are ideal for protecting lengthy structures such as underground pipelines. The dc power source would typically have a dc output of up to 50. 1 decrease of corrosion rate by shifting the corrosion potential of the electrode toward a less oxidizing potential by applying an external electromotive force.

2 partial or complete protection of a metal from corrosion by making it a cathode using either a galvanic anode or a dc impressed current. Impressed current cathodic protection systems have the benefit of using an external power supply to drive current. The main difference between impressed current cathodic protection iccp and passive cathodic protection cp is the presence of an external power supply. This technique is known as impressed current cathodic protection iccp.

The flanges of connecting pipes are usually insulated using isolation kits to separate the pipes into smaller more manageable sections for the purposes of iccp protection. Both corrosion protection systems however operate on the same basic concept of bimetallic galvanic corrosion. These pipeline sections are protected against corrosion with an advanced impressed current cathodic protection system above hat combined with sacrificial anode protection from hat to lat.