Corrosion behaviour of mechanically polished AA7075-T6 aluminium alloy
In the present study, the effects of mechanical polishing on the microstructure and corrosion behaviour of AA7075 aluminium alloy are investigated. It was found that a nano‐grained, near‐surface deformed layer, up to 400 nm thickness, is developed due to significant surface shear stress during mecha...
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| Veröffentlicht in: | Surface and interface analysis 2010-04, Vol.42 (4), p.185-188 |
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| creator | Liu, Y. Laurino, A. Hashimoto, T. Zhou, X. Skeldon, P. Thompson, G. E. Scamans, G. M. Blanc, C. Rainforth, W. M. Frolish, M. F. |
| description | In the present study, the effects of mechanical polishing on the microstructure and corrosion behaviour of AA7075 aluminium alloy are investigated. It was found that a nano‐grained, near‐surface deformed layer, up to 400 nm thickness, is developed due to significant surface shear stress during mechanically polishing. Within the near‐surface deformed layer, the alloying elements have been redistributed and the microstructure of the alloy is modified; in particular, the normal MgZn2 particles for T6 are absent. However, segregation bands, approximately 10‐nm thick, containing mainly zinc, are found at the grain boundaries within the near‐surface deformed layer. The presence of such segregation bands promoted localised corrosion along the grain boundaries within the near‐surface deformed layer due to microgalvanic action. During anodic polarisation of mechanically polished alloy in sodium chloride solution, two breakdown potentials were observed at −750 mV and −700 mV, respectively. The first breakdown potential is associated with an increased electrochemical activity of the near‐surface deformed layer, and the second breakdown potential is associated with typical pitting of the bulk alloy. Copyright © 2009 John Wiley & Sons, Ltd. |
| doi_str_mv | 10.1002/sia.3136 |
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E. ; Scamans, G. M. ; Blanc, C. ; Rainforth, W. M. ; Frolish, M. F.</creator><creatorcontrib>Liu, Y. ; Laurino, A. ; Hashimoto, T. ; Zhou, X. ; Skeldon, P. ; Thompson, G. E. ; Scamans, G. M. ; Blanc, C. ; Rainforth, W. M. ; Frolish, M. F.</creatorcontrib><description>In the present study, the effects of mechanical polishing on the microstructure and corrosion behaviour of AA7075 aluminium alloy are investigated. It was found that a nano‐grained, near‐surface deformed layer, up to 400 nm thickness, is developed due to significant surface shear stress during mechanically polishing. Within the near‐surface deformed layer, the alloying elements have been redistributed and the microstructure of the alloy is modified; in particular, the normal MgZn2 particles for T6 are absent. However, segregation bands, approximately 10‐nm thick, containing mainly zinc, are found at the grain boundaries within the near‐surface deformed layer. The presence of such segregation bands promoted localised corrosion along the grain boundaries within the near‐surface deformed layer due to microgalvanic action. During anodic polarisation of mechanically polished alloy in sodium chloride solution, two breakdown potentials were observed at −750 mV and −700 mV, respectively. The first breakdown potential is associated with an increased electrochemical activity of the near‐surface deformed layer, and the second breakdown potential is associated with typical pitting of the bulk alloy. Copyright © 2009 John Wiley & Sons, Ltd.</description><identifier>ISSN: 0142-2421</identifier><identifier>ISSN: 1096-9918</identifier><identifier>EISSN: 1096-9918</identifier><identifier>DOI: 10.1002/sia.3136</identifier><identifier>CODEN: SIANDQ</identifier><language>eng</language><publisher>Chichester, UK: John Wiley & Sons, Ltd</publisher><subject>AA7075 aluminium alloy ; Alloying elements ; Aluminum base alloys ; Breakdown ; Chemical Sciences ; Condensed matter: structure, mechanical and thermal properties ; corrosion ; Cross-disciplinary physics: materials science; rheology ; Defects and impurities in crystals; microstructure ; Deformation ; Engineering Sciences ; Exact sciences and technology ; Grain and twin boundaries ; Grain boundaries ; grain boundary ; Material chemistry ; Materials ; Materials science ; Nanostructure ; near-surface deformed layer ; Physics ; Polished ; Polishing ; Segregations ; Solid surfaces and solid-solid interfaces ; Structure of solids and liquids; crystallography ; Surface structure and topography ; Surface treatments ; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)</subject><ispartof>Surface and interface analysis, 2010-04, Vol.42 (4), p.185-188</ispartof><rights>Copyright © 2009 John Wiley & Sons, Ltd.</rights><rights>2015 INIST-CNRS</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4346-a285a160243837643485cab5767be0357357879ec923ddef933dbb5ab594141e3</citedby><cites>FETCH-LOGICAL-c4346-a285a160243837643485cab5767be0357357879ec923ddef933dbb5ab594141e3</cites><orcidid>0000-0003-2183-0671</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fsia.3136$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fsia.3136$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,309,310,314,776,780,785,786,881,1411,23909,23910,25118,27901,27902,45550,45551</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22628462$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-03551001$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Liu, Y.</creatorcontrib><creatorcontrib>Laurino, A.</creatorcontrib><creatorcontrib>Hashimoto, T.</creatorcontrib><creatorcontrib>Zhou, X.</creatorcontrib><creatorcontrib>Skeldon, P.</creatorcontrib><creatorcontrib>Thompson, G. E.</creatorcontrib><creatorcontrib>Scamans, G. M.</creatorcontrib><creatorcontrib>Blanc, C.</creatorcontrib><creatorcontrib>Rainforth, W. M.</creatorcontrib><creatorcontrib>Frolish, M. F.</creatorcontrib><title>Corrosion behaviour of mechanically polished AA7075-T6 aluminium alloy</title><title>Surface and interface analysis</title><addtitle>Surf. Interface Anal</addtitle><description>In the present study, the effects of mechanical polishing on the microstructure and corrosion behaviour of AA7075 aluminium alloy are investigated. It was found that a nano‐grained, near‐surface deformed layer, up to 400 nm thickness, is developed due to significant surface shear stress during mechanically polishing. Within the near‐surface deformed layer, the alloying elements have been redistributed and the microstructure of the alloy is modified; in particular, the normal MgZn2 particles for T6 are absent. However, segregation bands, approximately 10‐nm thick, containing mainly zinc, are found at the grain boundaries within the near‐surface deformed layer. The presence of such segregation bands promoted localised corrosion along the grain boundaries within the near‐surface deformed layer due to microgalvanic action. During anodic polarisation of mechanically polished alloy in sodium chloride solution, two breakdown potentials were observed at −750 mV and −700 mV, respectively. The first breakdown potential is associated with an increased electrochemical activity of the near‐surface deformed layer, and the second breakdown potential is associated with typical pitting of the bulk alloy. Copyright © 2009 John Wiley & Sons, Ltd.</description><subject>AA7075 aluminium alloy</subject><subject>Alloying elements</subject><subject>Aluminum base alloys</subject><subject>Breakdown</subject><subject>Chemical Sciences</subject><subject>Condensed matter: structure, mechanical and thermal properties</subject><subject>corrosion</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Defects and impurities in crystals; microstructure</subject><subject>Deformation</subject><subject>Engineering Sciences</subject><subject>Exact sciences and technology</subject><subject>Grain and twin boundaries</subject><subject>Grain boundaries</subject><subject>grain boundary</subject><subject>Material chemistry</subject><subject>Materials</subject><subject>Materials science</subject><subject>Nanostructure</subject><subject>near-surface deformed layer</subject><subject>Physics</subject><subject>Polished</subject><subject>Polishing</subject><subject>Segregations</subject><subject>Solid surfaces and solid-solid interfaces</subject><subject>Structure of solids and liquids; crystallography</subject><subject>Surface structure and topography</subject><subject>Surface treatments</subject><subject>Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)</subject><issn>0142-2421</issn><issn>1096-9918</issn><issn>1096-9918</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNp1kFtLwzAYQIMoOC_gT-iLoA-duTSXPnbFOWHogxPFl5B2KYumzUxWdf_ejI35JAS-8HE4fBwALhAcIgjxTTBqSBBhB2CAYM7SPEfiEAwgynCKM4yOwUkI7xBCQQQbgHHpvHfBuC6p9EJ9Gdf7xDVJq-uF6kytrF0nS2dNWOh5UhQccprOWKJs35rO9G38Wbc-A0eNskGf7-YpeB7fzspJOn28uy-LaVpnJGOpwoIqxCDOiCCcxZ2gtaooZ7zSkFAen-C5rnNM5nPd5ITMq4pGIs9QhjQ5Bddb70JZufSmVX4tnTJyUkzlZhclNHZAXyiyV1t26d1nr8NKtibU2lrVadcHiSDGQsQb-B9axxbB62bvRlBussqYVW6yRvRyZ1Uh1mm86moT9jzGDIuM4cilW-7bWL3-1yef7oudd8ebsNI_e175D8k44VS-PNzJclSOZvQNy1fyCwrEkV4</recordid><startdate>201004</startdate><enddate>201004</enddate><creator>Liu, Y.</creator><creator>Laurino, A.</creator><creator>Hashimoto, T.</creator><creator>Zhou, X.</creator><creator>Skeldon, P.</creator><creator>Thompson, G. E.</creator><creator>Scamans, G. M.</creator><creator>Blanc, C.</creator><creator>Rainforth, W. M.</creator><creator>Frolish, M. F.</creator><general>John Wiley & Sons, Ltd</general><general>Wiley</general><general>Wiley-Blackwell</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7SE</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0003-2183-0671</orcidid></search><sort><creationdate>201004</creationdate><title>Corrosion behaviour of mechanically polished AA7075-T6 aluminium alloy</title><author>Liu, Y. ; Laurino, A. ; Hashimoto, T. ; Zhou, X. ; Skeldon, P. ; Thompson, G. E. ; Scamans, G. M. ; Blanc, C. ; Rainforth, W. M. ; Frolish, M. F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4346-a285a160243837643485cab5767be0357357879ec923ddef933dbb5ab594141e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>AA7075 aluminium alloy</topic><topic>Alloying elements</topic><topic>Aluminum base alloys</topic><topic>Breakdown</topic><topic>Chemical Sciences</topic><topic>Condensed matter: structure, mechanical and thermal properties</topic><topic>corrosion</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Defects and impurities in crystals; microstructure</topic><topic>Deformation</topic><topic>Engineering Sciences</topic><topic>Exact sciences and technology</topic><topic>Grain and twin boundaries</topic><topic>Grain boundaries</topic><topic>grain boundary</topic><topic>Material chemistry</topic><topic>Materials</topic><topic>Materials science</topic><topic>Nanostructure</topic><topic>near-surface deformed layer</topic><topic>Physics</topic><topic>Polished</topic><topic>Polishing</topic><topic>Segregations</topic><topic>Solid surfaces and solid-solid interfaces</topic><topic>Structure of solids and liquids; crystallography</topic><topic>Surface structure and topography</topic><topic>Surface treatments</topic><topic>Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Liu, Y.</creatorcontrib><creatorcontrib>Laurino, A.</creatorcontrib><creatorcontrib>Hashimoto, T.</creatorcontrib><creatorcontrib>Zhou, X.</creatorcontrib><creatorcontrib>Skeldon, P.</creatorcontrib><creatorcontrib>Thompson, G. E.</creatorcontrib><creatorcontrib>Scamans, G. M.</creatorcontrib><creatorcontrib>Blanc, C.</creatorcontrib><creatorcontrib>Rainforth, W. M.</creatorcontrib><creatorcontrib>Frolish, M. F.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Corrosion Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Surface and interface analysis</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Liu, Y.</au><au>Laurino, A.</au><au>Hashimoto, T.</au><au>Zhou, X.</au><au>Skeldon, P.</au><au>Thompson, G. E.</au><au>Scamans, G. M.</au><au>Blanc, C.</au><au>Rainforth, W. M.</au><au>Frolish, M. F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Corrosion behaviour of mechanically polished AA7075-T6 aluminium alloy</atitle><jtitle>Surface and interface analysis</jtitle><addtitle>Surf. Interface Anal</addtitle><date>2010-04</date><risdate>2010</risdate><volume>42</volume><issue>4</issue><spage>185</spage><epage>188</epage><pages>185-188</pages><issn>0142-2421</issn><issn>1096-9918</issn><eissn>1096-9918</eissn><coden>SIANDQ</coden><abstract>In the present study, the effects of mechanical polishing on the microstructure and corrosion behaviour of AA7075 aluminium alloy are investigated. It was found that a nano‐grained, near‐surface deformed layer, up to 400 nm thickness, is developed due to significant surface shear stress during mechanically polishing. Within the near‐surface deformed layer, the alloying elements have been redistributed and the microstructure of the alloy is modified; in particular, the normal MgZn2 particles for T6 are absent. However, segregation bands, approximately 10‐nm thick, containing mainly zinc, are found at the grain boundaries within the near‐surface deformed layer. The presence of such segregation bands promoted localised corrosion along the grain boundaries within the near‐surface deformed layer due to microgalvanic action. During anodic polarisation of mechanically polished alloy in sodium chloride solution, two breakdown potentials were observed at −750 mV and −700 mV, respectively. The first breakdown potential is associated with an increased electrochemical activity of the near‐surface deformed layer, and the second breakdown potential is associated with typical pitting of the bulk alloy. Copyright © 2009 John Wiley & Sons, Ltd.</abstract><cop>Chichester, UK</cop><pub>John Wiley & Sons, Ltd</pub><doi>10.1002/sia.3136</doi><tpages>4</tpages><orcidid>https://orcid.org/0000-0003-2183-0671</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | Surface and interface analysis, 2010-04, Vol.42 (4), p.185-188 |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | AA7075 aluminium alloy Alloying elements Aluminum base alloys Breakdown Chemical Sciences Condensed matter: structure, mechanical and thermal properties corrosion Cross-disciplinary physics: materials science rheology Defects and impurities in crystals microstructure Deformation Engineering Sciences Exact sciences and technology Grain and twin boundaries Grain boundaries grain boundary Material chemistry Materials Materials science Nanostructure near-surface deformed layer Physics Polished Polishing Segregations Solid surfaces and solid-solid interfaces Structure of solids and liquids crystallography Surface structure and topography Surface treatments Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) |
| title | Corrosion behaviour of mechanically polished AA7075-T6 aluminium alloy |
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