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51313-02509-Development of Corrosion Inhibitors for Prevention of Top of the Line Corrosion (TLC)

Product Number: 51313-02509-SG
ISBN: 02509 2013 CP
Author: Ming Shen
Publication Date: 2013
$0.00
$20.00
$20.00

Ming Shen Alla Furman Rita Kharshan Tim Whited
Cortec Corporation

Marc Singer
Institute for Corrosion and Multiphase Technology Ohio University

Inhibition of Top of the Line Corrosion (TLC) in multiphase natural gas pipelines remains unsolved in spite of numerous research initiatives. The majority of studies in this area are still at the phase of laboratory testing and screening of products. The assumption is that the effectiveness of the injected corrosion inhibitor strongly depends on its volatility. On the other hand the harsh conditions of Top of the Line (TOL) application including low pH elevated temperature and pressure require strong affinity between the inhibitor molecule and the pipe material. Amines and their salts of low medium and high molecular weight were evaluated based on their physical-chemical properties and available data related to mechanism of corrosion prevention. Testing included evaluation of corrosion inhibition of carbon steel in a glass cell setup with or without carbon dioxide flow at 70°C and at a condensate pH close to 4. The corrosion rate was determined using weight loss method or by highly sensitive electrical-resistance probe. It was found that medium molecular weight amines and their salts show the best performance. Considering economical aspect of field application several possible delivery methods of the inhibitor to the pipe surface were evaluated and practical recommendations were made.

Key words: Inhibitor corrosion protection Top of the Line natural gas pipeline corrosion rate.
 

Ming Shen Alla Furman Rita Kharshan Tim Whited
Cortec Corporation

Marc Singer
Institute for Corrosion and Multiphase Technology Ohio University

Inhibition of Top of the Line Corrosion (TLC) in multiphase natural gas pipelines remains unsolved in spite of numerous research initiatives. The majority of studies in this area are still at the phase of laboratory testing and screening of products. The assumption is that the effectiveness of the injected corrosion inhibitor strongly depends on its volatility. On the other hand the harsh conditions of Top of the Line (TOL) application including low pH elevated temperature and pressure require strong affinity between the inhibitor molecule and the pipe material. Amines and their salts of low medium and high molecular weight were evaluated based on their physical-chemical properties and available data related to mechanism of corrosion prevention. Testing included evaluation of corrosion inhibition of carbon steel in a glass cell setup with or without carbon dioxide flow at 70°C and at a condensate pH close to 4. The corrosion rate was determined using weight loss method or by highly sensitive electrical-resistance probe. It was found that medium molecular weight amines and their salts show the best performance. Considering economical aspect of field application several possible delivery methods of the inhibitor to the pipe surface were evaluated and practical recommendations were made.

Key words: Inhibitor corrosion protection Top of the Line natural gas pipeline corrosion rate.
 

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