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51313-02655-Polyethylene Encasement Methodologies:10 Year Field Study on DIP in a Severely Corrosive Environment

Picture for Polyethylene Encasement Methodologies:10 Year Field Study on DIP in a Severely Corrosive Environment
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Product Number: 51313-02655-SG
ISBN: 02655 2013 CP
Author: Mike Horton
Publication Date: 2013
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Polyethylene Encasement Methodologies:
A 10 Year Field Study on Ductile Iron Pipe in a Severely Corrosive Environment

 

Mike Horton P.E.                                                                            George Ash
United States Pipe & Foundry Co.                                              Corr Flex Inc.
P.O. Box 10406                                                                               P.O. Box 89
Birmingham Al 35202                                                                  Odenville Al 35120

 

 

ABSTRACT


Polyethylene encasement as described in ANSI/AWWA C105/A21.5 has been the primary method of corrosion protection for iron pipe for more than 50 years. For the past 10 years laboratory and field research has been conducted investigating various materials and methodologies to enhance this technology.

Field investigations conducted in a severely corrosive Florida Everglades environment included the use of over 60 electrical resistance corrosion probes as well as actual pipe excavations and examinations. This paper summarizes the findings to date of the following methodologies with and without intentional damage to the film: standard polyethylene encasement film standard polyethylene encasement film supplemented with cathodic protection polyethylene encasement film enhanced with a biocide and a corrosion inhibitor and polyethylene encasement film enhanced with a biocide and a corrosion inhibitor supplemented with cathodic protection. A brief discussion of MIC (microbiologically influenced corrosion) is also included.

 

 


Key words: Iron pipe ductile iron pipe polyethylene encasement cathodic protection MIC microbiological corrosion biocide inhibitor and corrosion probe.
 

Polyethylene Encasement Methodologies:
A 10 Year Field Study on Ductile Iron Pipe in a Severely Corrosive Environment

 

Mike Horton P.E.                                                                            George Ash
United States Pipe & Foundry Co.                                              Corr Flex Inc.
P.O. Box 10406                                                                               P.O. Box 89
Birmingham Al 35202                                                                  Odenville Al 35120

 

 

ABSTRACT


Polyethylene encasement as described in ANSI/AWWA C105/A21.5 has been the primary method of corrosion protection for iron pipe for more than 50 years. For the past 10 years laboratory and field research has been conducted investigating various materials and methodologies to enhance this technology.

Field investigations conducted in a severely corrosive Florida Everglades environment included the use of over 60 electrical resistance corrosion probes as well as actual pipe excavations and examinations. This paper summarizes the findings to date of the following methodologies with and without intentional damage to the film: standard polyethylene encasement film standard polyethylene encasement film supplemented with cathodic protection polyethylene encasement film enhanced with a biocide and a corrosion inhibitor and polyethylene encasement film enhanced with a biocide and a corrosion inhibitor supplemented with cathodic protection. A brief discussion of MIC (microbiologically influenced corrosion) is also included.

 

 


Key words: Iron pipe ductile iron pipe polyethylene encasement cathodic protection MIC microbiological corrosion biocide inhibitor and corrosion probe.
 

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