Quantitative Study of the Hydrogen Entry Behavior of Low Alloy Steels for Various Sour Environments

Hara, Takuya

doi:10.2355/isijinternational.isijint-2017-600

Cited by 1 publication

(1 citation statement)

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“…The pH value is a factor that accelerates corrosion (pH ≤ 5) and therefore intensifies the interconnection of microcracks contained in the thickness of the steel. A high concentration of dissolved chlorides and sulfides increases the severity of the environment as well as the time of exposure to the sour environment [13,14].…”

Section: Hydrogen-induced Cracking and Affecting Factorsmentioning

confidence: 99%

Hydrogen Permeation in Carbon Steels

Gilberto Godinez Salcedo,

Gibran Arenas Salcedo,

Xicotencatl García Pérez

2024

Corrosion Engineering - Recent Breakthroughs and Innovative Solutions

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The atomic hydrogen generally comes from corrosion reactions that take place between the steel surface and the sour media. These reactions generate atomic hydrogen that due to its small size can be adsorbed and diffuse through interstitial sites of the crystalline lattice of steel, where it accumulates in nonmetallic discontinuities such as inclusions, dislocations and second phases, where atomic hydrogen begins to combine and form molecular hydrogen, which can no longer diffuse in the steel and over time produces high internal pressures in localized areas of the thickness of the material, leading to the nucleation and propagation of cracks and/or blisters in the absence of applied external stresses. This depends on the type of interaction that occurs between hydrogen and the metal, environmental conditions, heterogeneities of the metal, and the state of stress to which the components are subjected. Due to the increase in sour media in the petroleum industry, it was necessary to reconsider the application of electrochemical techniques and sensors to control and predict hydrogen-induced cracking (HIC).

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Section: Hydrogen-induced Cracking and Affecting Factorsmentioning

confidence: 99%