Ahmad Saatchi - Isfahan University of Technology/Metrical department
Abbas Aghajani - Isfahan University of Technology /Subsea R&D Center

Cathodic protection is one of the most important techniques employed for underground gas and pipeline corrosion protection. The authors have studied problems encountered in old and new installation in the field of oil and gas industries. Problems such as non uniform potential distribution, interference effects on foreign structures and misunderstanding in the use of cathodic protection in various installations. This paper will discuss the examples of such problems in cathodic protection of underground oil and gas pipelines and solution to the problems.

Cathodic protection, Corrosion protection, Complex installation, Underground pipeline, Interference, stray current