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07335 DEVELOPMENT AND APPLICATION OF DUCTILE IRON PIPE ELECTRICAL RESISTANCE PROBES FOR MONITORING UNDERGROUND EXTERNAL PIPELINE CORROSION

Picture for 07335 DEVELOPMENT AND APPLICATION OF DUCTILE IRON PIPE ELECTRICAL RESISTANCE PROBES FOR MONITORING U
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Product Number: 51300-07335-SG
ISBN: 07335 2007 CP
Author: Graham E. C. Bell, Clifford G. Moore, and Scott Williams
Publication Date: 2007
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The development and testing of low-profile ductile iron electrical resistance corrosion probes are presented. Included are field and laboratory evaluations relating to the corrosion behavior of ductile iron with and without the annealing oxide coating as well as carbon steel in the same testing environments. Also included are corrosion rate reduction and corresponding cathodic protection parameters, and the corrosion protection performance of the annealing oxide with and without standard asphaltic shop coatings. The metal loss, corrosion rate, electrochemical noise and calculated corrosion rate values are compared with pre-exposure probe measurement surface characteristics. At the conclusion of the laboratory testing, physical inspection of the probes were compared with the corrosion rates integrated over the period of the testing. The results presented demonstrate the viability of low-profile ductile corrosion probes as well as quantify the corrosion protection provided by the annealing oxide and asphaltic coatings.
The development and testing of low-profile ductile iron electrical resistance corrosion probes are presented. Included are field and laboratory evaluations relating to the corrosion behavior of ductile iron with and without the annealing oxide coating as well as carbon steel in the same testing environments. Also included are corrosion rate reduction and corresponding cathodic protection parameters, and the corrosion protection performance of the annealing oxide with and without standard asphaltic shop coatings. The metal loss, corrosion rate, electrochemical noise and calculated corrosion rate values are compared with pre-exposure probe measurement surface characteristics. At the conclusion of the laboratory testing, physical inspection of the probes were compared with the corrosion rates integrated over the period of the testing. The results presented demonstrate the viability of low-profile ductile corrosion probes as well as quantify the corrosion protection provided by the annealing oxide and asphaltic coatings.
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51318-11244- MIC Considerations for Cathodically Protected Encased Ductile Iron Pipelines: A Case Study

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Author: Jeffry B. Giddings / Mersedeh Akhoondan / Graham Bell
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A case study where MIC was recognized as primary cause of failure for an encased ductile iron water pipeline. The cathodically protected pipe was located within the proximity a creek crossing and had suffered from multiple failures.

 

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51313-02488-Cathodic Protection of Ductile Iron Water Pipelines

Product Number: 51313-02488-SG
ISBN: 02488 2013 CP
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Picture for 07127 Investigating Ductile Iron Pipelines
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07127 Investigating Ductile Iron Pipelines

Product Number: 51300-07127-SG
ISBN: 07127 2007 CP
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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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