Hydrogen Sulfide Effect on Hydrogen Entry into Iron—A Mechanistic Study

Iyer, Rajan N.; Takeuchi, Ichiroh; Zamanzadeh, M.; Pickering, H. W.

doi:10.5006/1.3585133

Cited by 70 publications

(67 citation statements)

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“…The following relationships for the permeation and cathodic current densities as a function of kinetic parameters were obtained by Iyer et al 29 for the coupled discharge-chemical recombination mechanism assuming Langmuir isotherm [1] [2]…”

Section: Hydrogen Permeation Characterization-mentioning

confidence: 99%

Development of a New Electrodeposition Process for Plating of Zn-Ni-X (X = Cd, P) Alloys Permeation Characteristics of Zn-Ni-Cd Ternary Alloys

Durairajan¹,

Haran²,

White³

et al. 2000

J. Electrochem. Soc.

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It is shown that an electrodeposited Zn-Ni-Cd alloy coating produced from sulfate electrolyte inhibits the discharge of hydrogen on carbon steel. The newly developed ternary alloys have approximately ten times higher corrosion resistance when compared to a Zn-Ni alloy. Hydrogen permeation characteristics of Zn-Ni-Cd alloy coatings were studied and compared with those of a bare and a Zn-Ni alloy coated steel. The transfer coefficient, ␣, exchange current density, i o , thickness dependent adsorption-absorption rate constant, kЉ, recombination rate constant, k 3 , surface hydrogen coverage, H , were obtained by applying a mathematical model to experimental results. Alloys obtained from baths containing higher concentration than 3 g/L of CdSO 4 in the sulfate plating bath are seen to have superior permeation inhibition properties compared to the Zn-Ni alloy coating and bare steel. The hydrogen permeation current was zero under normal corroding conditions for Zn-Ni-Cd alloy and it increased to 0.3 A/cm 2 at a cathodic overpotential of 250 mV. The hydrogen permeation current density for steel and Zn-Ni alloy under similar conditions were 62.1 and 1.3 A/cm 2 , respectively.

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Section: Hydrogen Permeation Characterization-mentioning

confidence: 99%

Development of a New Electrodeposition Process for Plating of Zn-Ni-X (X = Cd, P) Alloys Permeation Characteristics of Zn-Ni-Cd Ternary Alloys

Durairajan¹,

Haran²,

White³

et al. 2000

J. Electrochem. Soc.

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“…30,31 Although many explanations have been proposed to account for these effects, the detailed mechanism of the action of H 2 S is not yet fully understood. [32][33][34][35] Fig. 2.…”

Section: Hydrogen Embrittlement Mechanismsmentioning

confidence: 99%

Corrosion in the Oil and Gas Industry: An Increasing Challenge for Materials

Pérez

2013

JOM

126

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“…Several models have been published in literature to explain the hydrogen entry into metals and to evaluate the kinetic and permeation parameters required to explain the process [53][54][55][56][57]. The Tafel slope and dri/dlog(ia) relationship that is obtained for any particular system determines the selection of an appropriate model that can be used to evaluate the kinetics parameters for hydrogen permeation.…”

Section: Part 5: Hydrogen Permeation Studies On Ni-zn-p Alloysmentioning

confidence: 99%

“…The objective of this work is to determine the hydrogen permeation properties of the Ni-Zn-P deposits and compare it with that of Zn-Ni and Cd deposits obtained from commercial baths. Several models have tried to explain hydrogen entry into metal substrates and to evaluate kinetic parameters of hydrogen evolution and permeation based on experimental data [53][54][55][56][57][58]. The most significant of them is the model proposed by Iyer et al [56].…”

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confidence: 99%

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Development of Novel Process for the Deposition of Nanostructured Ternary Alloys and Composites for Replacement of Cadmium Coatings

Popov¹

2003

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instruction, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Ariington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188) Washington DC 20503. AGENCY USE ONLY (Leave blank)2. REPORT DATE December 2003 REPORT TYPE AND DATES COVERED FUNDING NUMBERSMOOOl 4-03-1-00286. AUTHOR(S) Branko N. Popov PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)Department of Chemical Engineering Swearingen Engineering Center University of South Carolina Columbia, SC 29208 SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)Office of Naval Research, 800 N. Quincy St., Arlington, VA 22217-5000 PERFORMING ORGANIZATION REPORT SUMBER SPONSORING/ MONITORING AGENCY REPORT NUMBER SUPPLEMENTARY NOTESThe views, opinions and/or findings contained in this report are those of the author(s) and should not be construed as an official Department of Army position, policy or decision, unless so designated by other documentation. 12a. DISTRIBUTION / AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. 12b. DISTRIBUTION CODE ABSTRACTThe objective of this investigation was to develop novel processes for depositing ternary Zn-Ni-X (X=Cu or P) alloys for replacement of Cd coatings in sacrificial protection of steel substrates. Introducing small amounts of Cu in the Zn-Ni plating bath results in alloys with reduced amount of Zn in the final deposit. This alloy shows improved corrosion performance that is 4 times higher than that of Cd coatings. Also, the use of autocatalytic method was investigated to deposit amorphous Ni-Zn-P alloys. The electroless Ni-Zn-P alloy shows improved corrosion performance that is 5 times higher than that of Cd coatings and reduces the hydrogen ingress into steel to 94%. A novel electrolytic process was developed to deposit Ni-Zn alloys with high Ni content. Deposition parameters like pH and temperature were optimized based on composition and the surface morphology of the coating. The Zn content in the coating was optimized based on the corrosion resistance of the final deposit. Finally, corrosion studies shows that Ni-Zn coatings obtained using these methods show a 5 times increase in barrier resistance as compared to Cd coatings. Also a mathematical model was developed to study the electroless Ni-Zn-P deposition. 14. SUBJECT TERMS Steel, Zn-Ni alloys, Sacrificial Protection, Corrosion resistance. Hydrogen Embrittlement, electroless process, model. SECURITY CLASSIFICATION OF REPORT Swaminatha P Kumaraguru, Basker Veeraraghavan and Branko N. Popov , "NonAanomalou...

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Hydrogen Sulfide Effect on Hydrogen Entry into Iron—A Mechanistic Study

Cited by 70 publications

References 0 publications

Development of a New Electrodeposition Process for Plating of Zn-Ni-X (X = Cd, P) Alloys Permeation Characteristics of Zn-Ni-Cd Ternary Alloys

Development of a New Electrodeposition Process for Plating of Zn-Ni-X (X = Cd, P) Alloys Permeation Characteristics of Zn-Ni-Cd Ternary Alloys

Corrosion in the Oil and Gas Industry: An Increasing Challenge for Materials

Development of Novel Process for the Deposition of Nanostructured Ternary Alloys and Composites for Replacement of Cadmium Coatings

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