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Products tagged with 'stress-induced grooves'

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From Pits To Cracks: A Review Of 45-Years Of Published Research On Surface Trenches In Low Alloy Steels Exposed To H2S-Containing Environments
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From Pits To Cracks: A Review Of 45-Years Of Published Research On Surface Trenches In Low Alloy Steels Exposed To H2S-Containing Environments

Product Number: 51322-17957-SG
Author: Dannisa R. Chalfoun, Teresa E. Perez, Mariano Iannuzzi, Mariano A. Kappes
Publication Date: 2022
$20.00

Carbon and low alloy steels (CS and LAS, respectively) used for exploration and production in the oil and gas (O&G) industry are normally exposed to environments that may contain H2S in a wide range of concentrations. In aqueous solutions, H2S acts as a cathodic poison.1,2 A cathodic poison inhibits the recombination of atomic hydrogen to H2, and as a result, favors its absorption by the metal.1,2 In the presence of a susceptible microstructure and the simultaneous effect of applied or residual tensile  stress, a crack can nucleate and propagate, when a critical concentration of hydrogen is reached in the metal.3 This environmentally assisted cracking (EAC) phenomenon is known as Sulfide Stress Cracking (SSC).2 SSC is commonly addressed as a case of hydrogen embrittlement (HE) damage.2
Picture for The Influence of Electrochemical Potential and Stress-Level on Trench Nucleation on Ni-Bearing Low Alloy Steels in Sour Environments
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The Influence of Electrochemical Potential and Stress-Level on Trench Nucleation on Ni-Bearing Low Alloy Steels in Sour Environments

Product Number: 51323-19030-SG
Author: Dannisa R. Chalfoun, Mariano A. Kappes, Teresa E. Perez, Mariano Iannuzzi, José Luis Otegui, Ricardo M. Carranza
Publication Date: 2023
$20.00

The presence of trenches on low alloy steels (LAS) in sour environments at the open circuit potential (OCP) has been reported since 1977. Originally, they were classified as deep and elongated localized corrosion pits. Recently, many authors have referred to them as “stress-induced grooves.
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