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10073 Understanding the Stress Corrosion Cracking of X-65 Pipeline Steel in Fuel-Grade Ethanol

Picture for 10073 Understanding the Stress Corrosion Cracking of X-65 Pipeline Steel in Fuel-Grade Ethanol
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Product Number: 51300-10073-SG
ISBN: 10073 2010 CP
Author: Xiaoyuan Lou, Di Yang, Lindsey R. Goodman and Preet M. Singh
Publication Date: 2010
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One of the major reasons why fuel-grade ethanol (FGE) is not currently transported by pipeline is its contribution to stress corrosion cracking (SCC) of carbon steel. Collaborative efforts have been made by several research groups to understand the mechanism of this SCC and to devise methods of protecting carbon steel from this environmentally assisted cracking. The focus of this paper is to discuss the effects of ethanol chemistry on SCC of carbon steel and to provide a mechanistic picture of crack initiation and growth in simulated fuel-grade ethanol (SFGE). Chloride content, water content, and pHe (pH value defined in ethanol-based solvent) of the ethanol are critical for SCC in this system. It was also found that film-related anodic dissolution controls the cracking dynamics in SFGE during the slow strain rate test (SSRT).

Keywords: stress corrosion cracking, fuel grade ethanol, pipeline steel, passivation
One of the major reasons why fuel-grade ethanol (FGE) is not currently transported by pipeline is its contribution to stress corrosion cracking (SCC) of carbon steel. Collaborative efforts have been made by several research groups to understand the mechanism of this SCC and to devise methods of protecting carbon steel from this environmentally assisted cracking. The focus of this paper is to discuss the effects of ethanol chemistry on SCC of carbon steel and to provide a mechanistic picture of crack initiation and growth in simulated fuel-grade ethanol (SFGE). Chloride content, water content, and pHe (pH value defined in ethanol-based solvent) of the ethanol are critical for SCC in this system. It was also found that film-related anodic dissolution controls the cracking dynamics in SFGE during the slow strain rate test (SSRT).

Keywords: stress corrosion cracking, fuel grade ethanol, pipeline steel, passivation
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Picture for 07574 SCC of Carbon Steel in Fuel Ethanol Service: Effect of Corrosion Potential and Ethanol Process
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07574 SCC of Carbon Steel in Fuel Ethanol Service: Effect of Corrosion Potential and Ethanol Processing Source

Product Number: 51300-07574-SG
ISBN: 07574 2007 CP
Author: Julio G. Maldonado and Narasi Sridhar
Publication Date: 07574
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Stress corrosion cracking (SCC) of carbon steel in fuel ethanol service has been observed in an increasing number of failures in the last few years. In the presence of oxygen, all of the samples evaluated in this study produced varying degrees of SCC, except for one of the producer ethanol samples. The reason for the high corrosion potential in this sample is still unknown and more detailed analysis of the sample chemical make-up is needed.

 
Picture for 08153 Prevention of Internal SCC in Ethanol Pipelines
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08153 Prevention of Internal SCC in Ethanol Pipelines

Product Number: 51300-08153-SG
ISBN: 08153 2008 CP
Author: J. Beavers, M. Brongers, A. Agrawal, and F. Tallarida
Publication Date: 2008
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Picture for Development of Carbon Steel for Pipe Resistant to Stress Corrosion Cracking in Fuel Grade Ethanol
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51316-7173-Development of Carbon Steel for Pipe Resistant to Stress Corrosion Cracking in Fuel Grade Ethanol

Product Number: 51316-7173-SG
ISBN: 7173 2016 CP
Author: Itaru Samusawa
Publication Date: 2016
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It is known that carbon steels in Fuel Grade Ethanol (FGE) has pitting corrosion and active path corrosion-type stress corrosion cracking (SCC) susceptibility.  In the current work, susceptibility of pitting and SCC of two types of X52 grade carbon steel were investigated by immersion testing and Slow Strain Rate Testing (SSRT).
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