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This paper presents several case histories where ductile iron pipeline sections have been investigated to ascertain the corrosioncontrol benefits of polyethylene encasement. Investigative procedures, included cell-to-cell potential surveys, side-drain technique measurements, in-situ and laboratory soil tests, pipe-to-soil potential measurements and excavation inspections.
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Case study for anode grid systems. used for Cathodic Protection of above ground storage tank bottom plates. Technical solutions for arranging the anode grid on large (90 m diameter) tanks are studied and compared in respect to the CP major objective.
Here we would like to elaborate on corrosion risk associated with coatings that shield cathodic protection.
Methods for dealing with sources of errors affecting the accuracy of the Direct Current Voltage Gradient (DCVG) coating defect identification and sizing tool.
This experimental setup includes two samples of buried steel pipes, one provided with an impressed current cathodic protection (ICCP) system and the other left unprotected - in a manipulated artificial environment.
This paper involved a case study of a project involving AC interference on pipelines located in Canada where soil resistivities increase rapidly by up to several orders of magnitude once water in the soil freezes in the winter.
This paper will look a data derived from sites that demonstrate this evaluation of soil resistivity and how this data may be applied in other aspects of cathodic protection and pipeline integrity management.
This paper outlines the essential features required in a software package that has sufficient capability to accurately predict and mitigate AC induction effects upon pipelines for a majority of rights-of-way.