Hydrogen Permeation of Carbon Steel in Weak Alkaline Solution Containing Hydrogen Sulfide and Cyanide Ion

Yamakawa, Kōji; Nishimura, Rokuro

doi:10.5006/1.3283961

Cited by 14 publications

(5 citation statements)

References 1 publication

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“…It will be interesting to examine the peculiarity of area and its influence on delayed fracture, for instance, heavy industrial region where air pollution level is high or coastal area in tropical region. 58,71) Electrochemical hydrogen permeation is an useful method to investigate hydrogen entry and diffusion in metals, [72][73][74][75][76][77][78][79][80][81] hydrogen traps, 81,82) and the method has been used to monitor hydrogen entry under outdoor exposure 34,38,83) and CCT 84) conditions. Omura et al have reported the correspondence between hydrogen permeation current at an exposure site and fracture ratio of exposure bolts.…”

Section: Ssrt After Outdoor Exposurementioning

confidence: 99%

Evaluation of Delayed Fracture Property of High Strength Bolt Steels

Akiyama

2012

ISIJ Int.

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Experimental studies attempting to evaluate the delayed fracture property of high strength bolt steels by using slow strain rate tests (SSRT) of circumferentially notched round bar specimens are reviewed in this paper. The relationship between the notch tensile strength (NTS) of the hydrogen-precharged specimens and the hydrogen content was approximated by power law relationship. It has been found that the local stress and the local diffusible hydrogen concentration control the occurrence of delayed fracture. To take into account the effect of hydrogen uptake from the environment, the notched bar specimens were subjected to cyclic corrosion test (CCT) and outdoor exposure, and their NTSs were measured using SSRT. The susceptibility of high strength steels to delayed fracture estimated from the decrease of NTS was correspondent to the fracture ratio of high strength bolts of the steels obtained by outdoor exposure tests, and was successfully evaluated with consideration of hydrogen uptake. Hydrogen entry behavior under CCT was monitored by electrochemical hydrogen permeation test, and continuous increase in hydrogen entry with growth of rust layer was observed. It is suggested that the "delay" of delayed fracture is the time required for the enhancement of the hydrogen entry efficiency.KEY WORDS: delayed fracture; hydrogen embrittlement; high strength steel; slow strain rate test; atmospheric corrosion; electrochemical hydrogen permeation; cyclic corrosion test; exposure test.

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Section: Ssrt After Outdoor Exposurementioning

confidence: 99%

Evaluation of Delayed Fracture Property of High Strength Bolt Steels

Akiyama

2012

ISIJ Int.

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“…From these results, hydrogen permeability was predicted and quantified for various sour environments using Eqs. (9) to (11).…”

Section: Prediction Of Hydrogen Permeability For Variousmentioning

confidence: 99%

“…Many researchers investigated the hydrogen entry behavior for various sour environments; [8][9][10][11] however, few studies investigate the hydrogen entry behavior in sour environments exceeding pH 5.0. 12,13) Recently, some sour line pipe projects exceed the pH of 5.0, such as the Blue Stream project and South Stream project.…”

Section: Introductionmentioning

confidence: 99%

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

Hara

2018

ISIJ International

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“…It is well known that trapped hydrogen can cause serious damage to metal, such as embrittlement, cracking or even blistering [1,[6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…However, the presence of a certain amount of cyanide ion (CN -) destroys the sulfide film (reaction (4)), again rendering the metal surface susceptible to corrosion processes and to the generation of hydrogen [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Development of a new electrochemical methodology at carbon steel/Na2S system for corrosion monitoring in oil refineries

Silva

Ponte

et al. 2010

J Appl Electrochem

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The current trend for processing more aggressive crude oils has resulted in a considerable increase of corrosion and hydrogen damage at Fluid Catalytic Cracking Units in Brazil. Therefore, it was proposed a new method for on-line and real time corrosion monitoring: evaluation of the integrity of the iron sulfide film by the voltammetric technique. This methodology would allow one to detect and inhibit the destruction of the sulfide layer by cyanide ions before a significant amount of hydrogen is generated and permeates the steel. Therefore, the lifetime of industrial equipment would be considerably improved. The feasibility of the proposed methodology was validated through bench scale tests.

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Hydrogen Permeation of Carbon Steel in Weak Alkaline Solution Containing Hydrogen Sulfide and Cyanide Ion

Cited by 14 publications

References 1 publication

Evaluation of Delayed Fracture Property of High Strength Bolt Steels

Evaluation of Delayed Fracture Property of High Strength Bolt Steels

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

Development of a new electrochemical methodology at carbon steel/Na2S system for corrosion monitoring in oil refineries

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