Corrosion Rates of Ductile Iron Pipe in Drilling Fluids: A Comparison of ASTM Electrochemical Standards G59, G102, and G106 to ASTM Weight Loss Standard G162
Corrosion Rates of Ductile Iron Pipe in Drilling Fluids: A Comparison of ASTM Electrochemical Standards G59, G102, and G106 to ASTM Weight Loss Standard G162

Author: Mike Horton

Publisher:

Published: 2019

Total Pages: 18

ISBN-13:

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One of the most commonly used piping materials for transport of water and wastewater in the United States is ductile iron pipe (DIP). Although this piping normally is installed using open trench cuts, a trenchless installation method that is finding increased popularity for DIP is horizontal directional drilling (HDD). Many HDD installations utilize specialized drilling fluids, commonly called "drilling muds," which may be composed of bentonite clay, various organic and inorganic additives, polymers, lubricants, wetting agents, or polymers mixed with water (or any combination thereof). To evaluate the corrosion characteristics of these fluids in contact with DIP, a 1-year corrosion study involving more than 200 ductile iron pipe specimens was conducted comparing five commercially available directional drilling fluids. Corrosion tests were conducted using electrochemical test methods described in ASTM G59, Standard Test Method for Conducting Potentiodynamic Polarization Resistance Measurements, ASTM G102, Standard Practice for Calculation of Corrosion Rates and Related Information from Electrochemical Measurements, and ASTM G106, Standard Practice for Verification of Algorithm and Equipment for Electrochemical Impedance Measurements, and these results were compared to 1-year weight loss test results obtained using ASTM G162, Standard Practice for Conducting and Evaluating Laboratory Corrosions Tests in Soils. This paper discusses which electrochemical test method and method of analysis gave results closest to those obtained with ASTM G162 weight loss evaluation.

New Pipeline Technologies, Security, and Safety
New Pipeline Technologies, Security, and Safety

Author: Mohammad Najafi

Publisher:

Published: 2003

Total Pages: 926

ISBN-13:

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This collection contains 200 papers presented at the ASCE International Conference on Pipeline Engineering and Construction, held in Baltimore, Maryland, July 13-16, 2003.

External Corrosion and Corrosion Control of Buried Water Mains
External Corrosion and Corrosion Control of Buried Water Mains

Author: Andrew E. Romer

Publisher: American Water Works Association

Published: 2004

Total Pages: 188

ISBN-13: 9781583213476

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Water utilities often do not know the specific cause of external corrosion observed on their water mains, and consequently, the chosen preventative measure may not work effectively. Historically, these choices are based on data from other industries (e.g., gas and oil) and may not be suitable for the water industry. Corrosion of metallic pipes can be caused by a variety of mechanisms, each of which requires a different solution. Determining which corrosion mechanism is at work is not a simple matter, because the resulting pipe damage looks similar for all of them. The failure to properly identify corrosion sources may produce prevention systems that are ineffective or do not last. For example, it is not effective to install an anode bag on a main that has a bacteriological corrosion problem. Similarly, an anode bag installed to reduce corrosion caused by a stray impressed current would be quickly used up and would provide only short-term protection. Much recent research on corrosion has focused on internal corrosion, primarily related to water-quality issues, such as lead and copper control and red water. This project will examine external corrosion, which affects the structural integrity of the pipe and makes it vulnerable to leaks and breakage. After identifying the causes of external corrosion, the study will find economical solutions for each type of corrosion and verify them through field trials.

Drilling Fluids Processing Handbook
Drilling Fluids Processing Handbook

Author: Dipti Mishra

Publisher:

Published: 2015-03

Total Pages: 0

ISBN-13: 9781681173566

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Drilling fluid is used to aid the drilling of boreholes into the earth. Often used while drilling oil and natural gas wells and on exploration drilling rigs, drilling fluids are also used for much simpler boreholes, such as water wells. Liquid drilling fluid is often called drilling mud. The three main categories of drilling fluids are water-based muds (which can be dispersed and non-dispersed), non-aqueous muds, usually called oil-based mud, and gaseous drilling fluid, in which a wide range of gases can be used. The main functions of drilling fluids include providing hydrostatic pressure to prevent formation fluids from entering into the well bore, keeping the drill bit cool and clean during drilling, carrying out drill cuttings, and suspending the drill cuttings while drilling is paused and when the drilling assembly is brought in and out of the hole. The drilling fluid used for a particular job is selected to avoid formation damage and to limit corrosion.