This presentation was made by Ken Lax, Technical Director of Corroconsult, on behalf of the Pipeline Industries Guild (PIG) Onshore Panel as part of their ongoing free webinar series.

The presentation is intended for non-specialists to provide an overview of cathodic protection and stray current corrosion.

No electrical or electrochemical knowledge is assumed.

The presentation is non-mathematical and with only a sprinkling of science. It is a description of the processes, rather than a technical analysis.

The presentation covers the following;

• Why steel corrodes

• The role of coatings

• Pipeline Cathodic Protection - General Description

• Cathodic Protection - Galvanic / Sacrificial Anodes

• Cathodic Protection - Impressed Current

• Efffects of DC Stray Currents on External Corrosion

• Effects of Induced AC on External Corrosion