Cathodic protection system for underground M.S. pipeline of watersupply project.

Corrosion of steel embedded in soil can generally be explained in terms of long cell action arising from differential aeration. The significant factors to promote corrosion are soil potential, Resistivity and draining characteristics. As the corrosive nature of soil is not fixed absolute value, the said study can be analyzed by adopting the following methodology. i) Study of state of soil at different location. ii) Nature of corrosion under consideration With above methodology an attempt can be made to achieve the following objective to, i) Assess the extent of corrosive tendencies of soil along the pipeline. ii) Co-relate potential and resistivity with corrosive parameters of soil and, iii) Suggest the appropriate remedial means for protecting it from corrosion. i.e. Galvanic activity.