{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/19040"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/19040","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Pitting corrosion of aluminum-alloys at aluminum(3) iron inclusions: The effect of local chemical environment and transport phenomena","abstract":"Al$\\sb3$Fe and $\\alpha$-AlFeSi type intermetallic particles depassivate the passive film of many commercial aluminum alloys through a local alkalization mechanism in an aerated NaCl solution. This mechanism was verified on the basis of polarization data, theoretical modeling, and in-situ optical observations for commercial aluminum alloys 6061-T6, 5454-H32, and Al-8%Fe. The local alkalization results in either ditching or pitting at the interfacial region between the particles and the aluminum matrix. A micro-disk electrode concept was adopted to calculate the oxygen reduction limiting current at intermetallics to explain the mechanism and predict the related electrochemical behavior. It is suggested that dissolved oxygen acts as a depassivator for the pitting on commercial aluminum alloys in an aerated NaCl solution.","abstract_html":"Al$\\sb3$Fe and <span class=\"etd-inline-math\">&alpha;</span>-AlFeSi type intermetallic particles depassivate the passive film of many commercial aluminum alloys through a local alkalization mechanism in an aerated NaCl solution. This mechanism was verified on the basis of polarization data, theoretical modeling, and in-situ optical observations for commercial aluminum alloys 6061-T6, 5454-H32, and Al-8%Fe. The local alkalization results in either ditching or pitting at the interfacial region between the particles and the aluminum matrix. A micro-disk electrode concept was adopted to calculate the oxygen reduction limiting current at intermetallics to explain the mechanism and predict the related electrochemical behavior. It is suggested that dissolved oxygen acts as a depassivator for the pitting on commercial aluminum alloys in an aerated NaCl solution.","abstract_has_math":true,"creators":["Paik, Chi-Hum"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemical Engineering","degree_department":null,"school":null,"contributors":["Alkire, Richard C."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T11:55:06Z","date_published":"2011-05-07T11:55:06Z","updated_at":"2026-07-22T22:25:12Z","subjects":["Chemical Engineering"],"languages":["eng"],"rights":["Copyright 1993 Paik, Chi-Hum"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9329127","(UMI)AAI9329127"],"render_values":[{"text":"AAI9329127","href":null,"code":true},{"text":"(UMI)AAI9329127","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/19040","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Alkire, Richard C."]},{"key":"dc:creator","label":"Author","values":["Paik, Chi-Hum"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T11:55:06Z","10000-01-01","1993"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Chemical Engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1993 Paik, Chi-Hum"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9329127","(UMI)AAI9329127","http://hdl.handle.net/2142/19040"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Al$\\sb3$Fe and $\\alpha$-AlFeSi type intermetallic particles depassivate the passive film of many commercial aluminum alloys through a local alkalization mechanism in an aerated NaCl solution. This mechanism was verified on the basis of polarization data, theoretical modeling, and in-situ optical observations for commercial aluminum alloys 6061-T6, 5454-H32, and Al-8%Fe. The local alkalization results in either ditching or pitting at the interfacial region between the particles and the aluminum matrix. A micro-disk electrode concept was adopted to calculate the oxygen reduction limiting current at intermetallics to explain the mechanism and predict the related electrochemical behavior. It is suggested that dissolved oxygen acts as a depassivator for the pitting on commercial aluminum alloys in an aerated NaCl solution.","Made available in DSpace on 2011-05-07T11:55:06Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9329127.pdf: 3230674 bytes, checksum: 387c9d04434a9327363ce833e72933ff (MD5) Previous issue date: 1993","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:34:15Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:13:00-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Pitting corrosion of aluminum-alloys at aluminum(3) iron inclusions: The effect of local chemical environment and transport phenomena"]}]}],"canonical_facts":{"dc:contributor":["Alkire, Richard C."],"dc:creator":["Paik, Chi-Hum"],"dc:date":["2011-05-07T11:55:06Z","10000-01-01","1993"],"dc:description":["Al$\\sb3$Fe and $\\alpha$-AlFeSi type intermetallic particles depassivate the passive film of many commercial aluminum alloys through a local alkalization mechanism in an aerated NaCl solution. This mechanism was verified on the basis of polarization data, theoretical modeling, and in-situ optical observations for commercial aluminum alloys 6061-T6, 5454-H32, and Al-8%Fe. The local alkalization results in either ditching or pitting at the interfacial region between the particles and the aluminum matrix. A micro-disk electrode concept was adopted to calculate the oxygen reduction limiting current at intermetallics to explain the mechanism and predict the related electrochemical behavior. It is suggested that dissolved oxygen acts as a depassivator for the pitting on commercial aluminum alloys in an aerated NaCl solution.","Made available in DSpace on 2011-05-07T11:55:06Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9329127.pdf: 3230674 bytes, checksum: 387c9d04434a9327363ce833e72933ff (MD5) Previous issue date: 1993","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:34:15Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:13:00-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9329127","(UMI)AAI9329127","http://hdl.handle.net/2142/19040"],"dc:language":["eng"],"dc:rights":["Copyright 1993 Paik, Chi-Hum"],"dc:subject":["Chemical Engineering"],"dc:title":["Pitting corrosion of aluminum-alloys at aluminum(3) iron inclusions: The effect of local chemical environment and transport phenomena"],"dc:type":["text"],"thesis:degree_discipline":["Chemical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:12Z"}