Products tagged with 'elongated pits'

View as

Sort by

Display per page

Available for download

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

Available for download

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.

Products tagged with 'elongated pits'

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

The Influence of Electrochemical Potential and Stress-Level on Trench Nucleation on Ni-Bearing Low Alloy Steels in Sour Environments

Association for Materials Protection and Performance