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oai:www.ideals.illinois.edu:2142/19040 2023-07-10 col_2142_5131 col_2142_11615 com_2142_5130 com_2142_9130 com_2142_8903

Alkire, Richard C. Paik, Chi-Hum 2011-05-07T11:55:06Z 2011-05-07T11:55:06Z 10000-01-01 1993 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 AAI9329127 (UMI)AAI9329127 http://hdl.handle.net/2142/19040 eng Copyright 1993 Paik, Chi-Hum Chemical Engineering Pitting corrosion of aluminum-alloys at aluminum(3) iron inclusions: The effect of local chemical environment and transport phenomena text Chemical and Biomolecular Engineering Chemical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.