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The determination/control of hydrogen behavior in low carbon steel as a function of surface treatment

Amey, Stephen Leonard
http://rave.ohiolink.edu/etdc/view?acc_num=case1060195239

Abstract Details

1993, Doctor of Philosophy, Case Western Reserve University, Materials Science and Engineering.
Hydrogen behavior in low carbon (<0.05wt.%) steel was investigated by both experimental evaluations and by the development of a hydrogen transport model. A phenomenological model was developed to evaluate hydrogen entry and/or exit in metals exposed to an aqueous environment. The model may be used to analyze data obtained from hydrogen permeation experiments through metal membranes and allows study of both surface and bulk transport phenomena. The model can allow arbitrary chemical potentials of hydrogen on both sides of a sheet, in addition to an arbitrary initial hydrogen distribution within the metal. When compared to other popular models, the model presented fit the experimental data well and indicated that the entry, exit and metallurgy of a sheet is significant to hydrogen absorption. The model parameters may be used to characterize a given charging process. As such, multiple processes may be evaluated by using the model to calculate hydrogen distributions in a metal sheet. Permeation experiments on steel sheets showed that with decreasing pH, increasing i c, electrolyte flow, surface roughness or temperature, hydrogen absorption will increase. In addition, titanium additions to ultra low carbon (0.005wt% C) steels were found to decrease the hydrogen dif fusivity and to affect the permeation behavior. Furthermore, lead contaminanted steel surfaces were found to both increase or decrease the permeation current. This effect was found to be lead surface coverage and polarization control dependent. A zinc coating was found to be a barrier to hydrogen for thicknesses between 1-3.6μm. A typical acidic electropickling process was found to inject twice as much hydrogen as an alkaline electrocleaning process or an acidic Zn plating process
Joe Payer (Advisor)
285 p.
Engineering, Materials Science
Hydrogen, control; Low carbon steel

Recommended Citations

Citations

  • Amey, S. L. (1993). The determination/control of hydrogen behavior in low carbon steel as a function of surface treatment [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1060195239

    APA Style (7th edition)

  • Amey, Stephen. The determination/control of hydrogen behavior in low carbon steel as a function of surface treatment. 1993. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1060195239.

    MLA Style (8th edition)

  • Amey, Stephen. "The determination/control of hydrogen behavior in low carbon steel as a function of surface treatment." Doctoral dissertation, Case Western Reserve University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=case1060195239

    Chicago Manual of Style (17th edition)

case1060195239
900
© 1993, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.