Examination of processes of hydrogen absorption in corrosion of steels in hydrogen sulfide-containing media

1992 ◽  
Vol 28 (3) ◽  
pp. 246-250
Author(s):  
T. Z. Akhmetov ◽  
D. S. Mukanov ◽  
G. A. Beisembaeva ◽  
V. B. Kleshnya ◽  
N. G. Krapivnyi
Keyword(s):  
Hydrogen Sulfide ◽  
Hydrogen Absorption

Inhibition of Hydrogen Absorption by Steels in Wet Hydrogen Sulfide Refinery Environments

CORROSION ◽  
1994 ◽  
Vol 50 (2) ◽  
pp. 152-159 ◽  
Author(s):  
S. M. Wilhelm ◽  
D. Abayarathna
Keyword(s):  
Hydrogen Sulfide ◽  
Hydrogen Absorption

Low Alloy Steels in Hydrogen Sulfide Environment

CORROSION ◽  
1982 ◽  
Vol 38 (3) ◽  
pp. 156-167 ◽  
Author(s):  
Yuichi Yoshino
Keyword(s):  
Hydrogen Sulfide ◽  
Hydrogen Absorption ◽  
Carbide Precipitation ◽  
Low Alloy Steels ◽  
Matrix Interface ◽  
Stress Cracking ◽  
Sulfide Stress ◽  
Alloy Steels ◽  
Carbide Matrix ◽  
Sulfide Stress Cracking

Abstract The effect of chemical composition on the behavior of low alloy steels in a hydrogen sulfide environment was studied with regard to corrosion, hydrogen absorption, and sulfide stress cracking. Results were interpreted in connection with microstructure and carbide precipitation. The addition of chromium results in the promotion of hydrogen absorption presumably due to the precipitation of incoherent carbides, thereby reducing, in general, the resistance to SSC. Fine coherent carbides appear to be beneficial, or at least not detrimental, to SSC resistance; e.g., Mo2C, VC, TiC, and NbC. Microstructure seems to affect both hydrogen absorption and SSC resistance largely through the trapping behavior of hydrogen at the carbide/matrix interface.

Electrochemical Transient Behaviors of Tubular Steel in Buffered Acidic Solution Dissolved with Hydrogen Sulfide and Carbon Dioxide

2011 ◽  
Vol 216 ◽  
pp. 321-326
Author(s):  
Hong Da Deng ◽  
Chun Fu Li ◽  
Xian Long Cao ◽  
Mei Yu Zhao
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Sulfide ◽  
Hydrogen Absorption ◽  
Acidic Solution ◽  
Reduction Reaction ◽  
Desorption Process ◽  
Metal Solution ◽  
Solution Interface ◽  
Different Content ◽  
Process Controls

In this work, the electrochemical transient behaviors of tubular steel API-P110 in buffered acidic NaCl solutions saturated with 50% H2S and different content of CO2 mixture gases, were investigated by single potential step chronoamperometry. Analysis of the results shows that fewer reactants take part in the reduction reaction when adding CO2 content from 17% to 50% in 50% H2S containing solution. Anions desorption process controls the reactant transferring process in metal-solution interface in the solution containing H2S and CO2. When at higher overpotential, anions desorption enhances and hydrogen absorption depresses with the increasing CO2 content in H2S/CO2.

Endogenous hydrogen sulfide sulfhydrates IKKβ at cysteine 179 to control pulmonary artery endothelial cell inflammation

2019 ◽  
Vol 133 (20) ◽  
pp. 2045-2059 ◽  
Author(s):  
Da Zhang ◽  
Xiuli Wang ◽  
Siyao Chen ◽  
Selena Chen ◽  
Wen Yu ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Endothelial Cell ◽  
Pulmonary Artery ◽  
Cell Model ◽  
Site Directed Mutagenesis ◽  
Critical Event ◽  
Hypertensive Rats ◽  
Pulmonary Artery Endothelial Cell

Abstract Background: Pulmonary artery endothelial cell (PAEC) inflammation is a critical event in the development of pulmonary arterial hypertension (PAH). However, the pathogenesis of PAEC inflammation remains unclear. Methods: Purified recombinant human inhibitor of κB kinase subunit β (IKKβ) protein, human PAECs and monocrotaline-induced pulmonary hypertensive rats were employed in the study. Site-directed mutagenesis, gene knockdown or overexpression were conducted to manipulate the expression or activity of a target protein. Results: We showed that hydrogen sulfide (H2S) inhibited IKKβ activation in the cell model of human PAEC inflammation induced by monocrotaline pyrrole-stimulation or knockdown of cystathionine γ-lyase (CSE), an H2S generating enzyme. Mechanistically, H2S was proved to inhibit IKKβ activity directly via sulfhydrating IKKβ at cysteinyl residue 179 (C179) in purified recombinant IKKβ protein in vitro, whereas thiol reductant dithiothreitol (DTT) reversed H2S-induced IKKβ inactivation. Furthermore, to demonstrate the significance of IKKβ sulfhydration by H2S in the development of PAEC inflammation, we mutated C179 to serine (C179S) in IKKβ. In purified IKKβ protein, C179S mutation of IKKβ abolished H2S-induced IKKβ sulfhydration and the subsequent IKKβ inactivation. In human PAECs, C179S mutation of IKKβ blocked H2S-inhibited IKKβ activation and PAEC inflammatory response. In pulmonary hypertensive rats, C179S mutation of IKKβ abolished the inhibitory effect of H2S on IKKβ activation and pulmonary vascular inflammation and remodeling. Conclusion: Collectively, our in vivo and in vitro findings demonstrated, for the first time, that endogenous H2S directly inactivated IKKβ via sulfhydrating IKKβ at Cys179 to inhibit nuclear factor-κB (NF-κB) pathway activation and thereby control PAEC inflammation in PAH.

Hydrogen absorption by very strong steel during chemical descaling

1966 ◽  
Vol 6 (11-12) ◽  
pp. 469-482 ◽  
Author(s):  
I GLASGOW ◽  
A ROSTRON ◽  
G THOMSON
Keyword(s):  
Hydrogen Absorption
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