The permeation of hydrogen through the passivating films on iron and nickel
Hydrogen permeation transients for passivated iron and nickel were measured at room temperature as a function of applied anodic potential and electrolyte composition. The permeation of hydrogen through the passivated metals is controlled chiefly by the kinetic processes in the passivating films. A m...
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| Veröffentlicht in: | Corrosion science 1989, Vol.29 (5), p.485-496 |
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| container_end_page | 496 |
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| container_title | Corrosion science |
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| creator | Pyun, Su-Il Oriani, R.A. |
| description | Hydrogen permeation transients for passivated iron and nickel were measured at room temperature as a function of applied anodic potential and electrolyte composition. The permeation of hydrogen through the passivated metals is controlled chiefly by the kinetic processes in the passivating films. A model describing the diffusion of hydrogen in the metal coupled with an activated jump of protons across a kinetic barrier is developed. The kinetics of hydrogen transport through passive films on iron and nickel are qualitatively discussed in terms of the specific rate parameter derived from the coupled diffusion-activated jump model fitted to the experimental curves. However, the nickel/oxide system shows inconsistencies with the model. A coupled diffusion-diffusion/migration model is proposed as an improved approach. |
| doi_str_mv | 10.1016/0010-938X(89)90001-2 |
| format | Article |
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The permeation of hydrogen through the passivated metals is controlled chiefly by the kinetic processes in the passivating films. A model describing the diffusion of hydrogen in the metal coupled with an activated jump of protons across a kinetic barrier is developed. The kinetics of hydrogen transport through passive films on iron and nickel are qualitatively discussed in terms of the specific rate parameter derived from the coupled diffusion-activated jump model fitted to the experimental curves. However, the nickel/oxide system shows inconsistencies with the model. 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The permeation of hydrogen through the passivated metals is controlled chiefly by the kinetic processes in the passivating films. A model describing the diffusion of hydrogen in the metal coupled with an activated jump of protons across a kinetic barrier is developed. The kinetics of hydrogen transport through passive films on iron and nickel are qualitatively discussed in terms of the specific rate parameter derived from the coupled diffusion-activated jump model fitted to the experimental curves. However, the nickel/oxide system shows inconsistencies with the model. A coupled diffusion-diffusion/migration model is proposed as an improved approach.</description><subject>Applied sciences</subject><subject>Corrosion</subject><subject>Corrosion mechanisms</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Exact sciences and technology</subject><subject>Materials science</subject><subject>Metals, semimetals and alloys</subject><subject>Metals. 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Metallurgy</topic><topic>Physics</topic><topic>Specific materials</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pyun, Su-Il</creatorcontrib><creatorcontrib>Oriani, R.A.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Corrosion science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pyun, Su-Il</au><au>Oriani, R.A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The permeation of hydrogen through the passivating films on iron and nickel</atitle><jtitle>Corrosion science</jtitle><date>1989</date><risdate>1989</risdate><volume>29</volume><issue>5</issue><spage>485</spage><epage>496</epage><pages>485-496</pages><issn>0010-938X</issn><eissn>1879-0496</eissn><coden>CRRSAA</coden><abstract>Hydrogen permeation transients for passivated iron and nickel were measured at room temperature as a function of applied anodic potential and electrolyte composition. The permeation of hydrogen through the passivated metals is controlled chiefly by the kinetic processes in the passivating films. A model describing the diffusion of hydrogen in the metal coupled with an activated jump of protons across a kinetic barrier is developed. The kinetics of hydrogen transport through passive films on iron and nickel are qualitatively discussed in terms of the specific rate parameter derived from the coupled diffusion-activated jump model fitted to the experimental curves. However, the nickel/oxide system shows inconsistencies with the model. A coupled diffusion-diffusion/migration model is proposed as an improved approach.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/0010-938X(89)90001-2</doi><tpages>12</tpages></addata></record> |
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| ispartof | Corrosion science, 1989, Vol.29 (5), p.485-496 |
| issn | 0010-938X 1879-0496 |
| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Corrosion Corrosion mechanisms Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Metals, semimetals and alloys Metals. Metallurgy Physics Specific materials |
| title | The permeation of hydrogen through the passivating films on iron and nickel |
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