Microstructure inhomogeneity of the constituent particles of 7075-T6 aluminum alloy after alkaline cleaning and desmutting
•Alkaline cleaning and desumtting behavior of 7075-T6 Al alloy was detailed.•Mg-Si constituent particles transformed to Si-rich oxides after pretreatment.•Non-uniform corrosion of Al-Fe-Cu constituent particles after pretreatment.•Microstructure inhomogeneity of the constituent particles after pretr...
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| Veröffentlicht in: | Corrosion science 2021-05, Vol.184, p.109354, Article 109354 |
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| creator | Chen, Siao-Ying Huang, Chao-Yu Lin, Chao-Sung |
| description | •Alkaline cleaning and desumtting behavior of 7075-T6 Al alloy was detailed.•Mg-Si constituent particles transformed to Si-rich oxides after pretreatment.•Non-uniform corrosion of Al-Fe-Cu constituent particles after pretreatment.•Microstructure inhomogeneity of the constituent particles after pretreatment.•Re-deposited Cu on Al-Fe-Cu constituent particles induced galvanic coupling.
The microstructural evolution of AA7075-T6 aluminum alloy during alkaline cleaning in NaOH solution and desmutting in HNO3 solution was studied. AA7075-T6 contained micro-sized Mg-Si and Al-Fe-Cu constituent particles. After desmutting, Mg-Si particles transformed to Si-O particles, leaving gaps with the aluminum matrix. The aluminum matrix nearby Al-Fe-Cu particles suffered slight trenching corrosion; meanwhile, the corrosion of Al-Fe-Cu particles varied from slight corrosion, dealloying, and nano-scale galvanic corrosion induced by re-deposited Cu particulates. After alkaline cleaning and desmutting, the microstructure of constituent particles was inhomogeneous although a uniform, 5 ∼ 15-nm-thick Al oxide/hydroxide film covered the aluminum matrix. |
| doi_str_mv | 10.1016/j.corsci.2021.109354 |
| format | Article |
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The microstructural evolution of AA7075-T6 aluminum alloy during alkaline cleaning in NaOH solution and desmutting in HNO3 solution was studied. AA7075-T6 contained micro-sized Mg-Si and Al-Fe-Cu constituent particles. After desmutting, Mg-Si particles transformed to Si-O particles, leaving gaps with the aluminum matrix. The aluminum matrix nearby Al-Fe-Cu particles suffered slight trenching corrosion; meanwhile, the corrosion of Al-Fe-Cu particles varied from slight corrosion, dealloying, and nano-scale galvanic corrosion induced by re-deposited Cu particulates. After alkaline cleaning and desmutting, the microstructure of constituent particles was inhomogeneous although a uniform, 5 ∼ 15-nm-thick Al oxide/hydroxide film covered the aluminum matrix.</description><identifier>ISSN: 0010-938X</identifier><identifier>EISSN: 1879-0496</identifier><identifier>DOI: 10.1016/j.corsci.2021.109354</identifier><language>eng</language><publisher>Amsterdam: Elsevier Ltd</publisher><subject>A. Aluminum ; Alkaline cleaning ; Aluminum alloys ; Aluminum base alloys ; B. AES ; B. TEM ; C. Acidic corrosion ; C. Alkaline corrosion ; C. De-alloying ; Casting ; Copper ; Corrosion ; Galvanic corrosion ; Inhomogeneity ; Iron ; Magnesium ; Metallurgical constituents ; Microstructure ; Particulates ; Scale (corrosion) ; Silicon ; Trenching</subject><ispartof>Corrosion science, 2021-05, Vol.184, p.109354, Article 109354</ispartof><rights>2021 Elsevier Ltd</rights><rights>Copyright Elsevier BV May 15, 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c334t-2fda43516ca3cce97e60165d7407e107693fa83afd601d9b772349f3cd0bd83d3</citedby><cites>FETCH-LOGICAL-c334t-2fda43516ca3cce97e60165d7407e107693fa83afd601d9b772349f3cd0bd83d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0010938X21001207$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Chen, Siao-Ying</creatorcontrib><creatorcontrib>Huang, Chao-Yu</creatorcontrib><creatorcontrib>Lin, Chao-Sung</creatorcontrib><title>Microstructure inhomogeneity of the constituent particles of 7075-T6 aluminum alloy after alkaline cleaning and desmutting</title><title>Corrosion science</title><description>•Alkaline cleaning and desumtting behavior of 7075-T6 Al alloy was detailed.•Mg-Si constituent particles transformed to Si-rich oxides after pretreatment.•Non-uniform corrosion of Al-Fe-Cu constituent particles after pretreatment.•Microstructure inhomogeneity of the constituent particles after pretreatment.•Re-deposited Cu on Al-Fe-Cu constituent particles induced galvanic coupling.
The microstructural evolution of AA7075-T6 aluminum alloy during alkaline cleaning in NaOH solution and desmutting in HNO3 solution was studied. AA7075-T6 contained micro-sized Mg-Si and Al-Fe-Cu constituent particles. After desmutting, Mg-Si particles transformed to Si-O particles, leaving gaps with the aluminum matrix. The aluminum matrix nearby Al-Fe-Cu particles suffered slight trenching corrosion; meanwhile, the corrosion of Al-Fe-Cu particles varied from slight corrosion, dealloying, and nano-scale galvanic corrosion induced by re-deposited Cu particulates. After alkaline cleaning and desmutting, the microstructure of constituent particles was inhomogeneous although a uniform, 5 ∼ 15-nm-thick Al oxide/hydroxide film covered the aluminum matrix.</description><subject>A. Aluminum</subject><subject>Alkaline cleaning</subject><subject>Aluminum alloys</subject><subject>Aluminum base alloys</subject><subject>B. AES</subject><subject>B. TEM</subject><subject>C. Acidic corrosion</subject><subject>C. Alkaline corrosion</subject><subject>C. De-alloying</subject><subject>Casting</subject><subject>Copper</subject><subject>Corrosion</subject><subject>Galvanic corrosion</subject><subject>Inhomogeneity</subject><subject>Iron</subject><subject>Magnesium</subject><subject>Metallurgical constituents</subject><subject>Microstructure</subject><subject>Particulates</subject><subject>Scale (corrosion)</subject><subject>Silicon</subject><subject>Trenching</subject><issn>0010-938X</issn><issn>1879-0496</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp9kE1PwzAMhiMEEmPwDzhE4tyRNG3TXpDQxJc0xGVI3KIscbeUNhlJijR-PZnKGV9iv_bryA9C15QsKKHVbbdQzgdlFjnJaZIaVhYnaEZr3mSkaKpTNCOEkqxh9cc5ugihI4TkSZmhn1ejvAvRjyqOHrCxOze4LVgw8YBdi-MOsHI2RBNHsBHvpY9G9RCOTU54ma0rLPtxMHYcUtK7A5ZtBJ_yT9kbm-w9SGvsFkursYYwjDGm8hKdtbIPcPX3ztH748N6-Zyt3p5elverTDFWxCxvtSxYSSslmVLQcKjSzaXmBeFACa8a1sqayVYnXTcbznNWNC1Tmmx0zTSbo5tp7967rxFCFJ0bvU1firzMaYoyEZujYpo64ggeWrH3ZpD-ICgRR8qiExNlcaQsJsrJdjfZIF3wbcCLNAFWgTYeVBTamf8X_AJD8old</recordid><startdate>20210515</startdate><enddate>20210515</enddate><creator>Chen, Siao-Ying</creator><creator>Huang, Chao-Yu</creator><creator>Lin, Chao-Sung</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SE</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope></search><sort><creationdate>20210515</creationdate><title>Microstructure inhomogeneity of the constituent particles of 7075-T6 aluminum alloy after alkaline cleaning and desmutting</title><author>Chen, Siao-Ying ; Huang, Chao-Yu ; Lin, Chao-Sung</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c334t-2fda43516ca3cce97e60165d7407e107693fa83afd601d9b772349f3cd0bd83d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>A. Aluminum</topic><topic>Alkaline cleaning</topic><topic>Aluminum alloys</topic><topic>Aluminum base alloys</topic><topic>B. AES</topic><topic>B. TEM</topic><topic>C. Acidic corrosion</topic><topic>C. Alkaline corrosion</topic><topic>C. De-alloying</topic><topic>Casting</topic><topic>Copper</topic><topic>Corrosion</topic><topic>Galvanic corrosion</topic><topic>Inhomogeneity</topic><topic>Iron</topic><topic>Magnesium</topic><topic>Metallurgical constituents</topic><topic>Microstructure</topic><topic>Particulates</topic><topic>Scale (corrosion)</topic><topic>Silicon</topic><topic>Trenching</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Siao-Ying</creatorcontrib><creatorcontrib>Huang, Chao-Yu</creatorcontrib><creatorcontrib>Lin, Chao-Sung</creatorcontrib><collection>CrossRef</collection><collection>Corrosion Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering 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>Chen, Siao-Ying</au><au>Huang, Chao-Yu</au><au>Lin, Chao-Sung</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Microstructure inhomogeneity of the constituent particles of 7075-T6 aluminum alloy after alkaline cleaning and desmutting</atitle><jtitle>Corrosion science</jtitle><date>2021-05-15</date><risdate>2021</risdate><volume>184</volume><spage>109354</spage><pages>109354-</pages><artnum>109354</artnum><issn>0010-938X</issn><eissn>1879-0496</eissn><abstract>•Alkaline cleaning and desumtting behavior of 7075-T6 Al alloy was detailed.•Mg-Si constituent particles transformed to Si-rich oxides after pretreatment.•Non-uniform corrosion of Al-Fe-Cu constituent particles after pretreatment.•Microstructure inhomogeneity of the constituent particles after pretreatment.•Re-deposited Cu on Al-Fe-Cu constituent particles induced galvanic coupling.
The microstructural evolution of AA7075-T6 aluminum alloy during alkaline cleaning in NaOH solution and desmutting in HNO3 solution was studied. AA7075-T6 contained micro-sized Mg-Si and Al-Fe-Cu constituent particles. After desmutting, Mg-Si particles transformed to Si-O particles, leaving gaps with the aluminum matrix. The aluminum matrix nearby Al-Fe-Cu particles suffered slight trenching corrosion; meanwhile, the corrosion of Al-Fe-Cu particles varied from slight corrosion, dealloying, and nano-scale galvanic corrosion induced by re-deposited Cu particulates. After alkaline cleaning and desmutting, the microstructure of constituent particles was inhomogeneous although a uniform, 5 ∼ 15-nm-thick Al oxide/hydroxide film covered the aluminum matrix.</abstract><cop>Amsterdam</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.corsci.2021.109354</doi></addata></record> |
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| subjects | A. Aluminum Alkaline cleaning Aluminum alloys Aluminum base alloys B. AES B. TEM C. Acidic corrosion C. Alkaline corrosion C. De-alloying Casting Copper Corrosion Galvanic corrosion Inhomogeneity Iron Magnesium Metallurgical constituents Microstructure Particulates Scale (corrosion) Silicon Trenching |
| title | Microstructure inhomogeneity of the constituent particles of 7075-T6 aluminum alloy after alkaline cleaning and desmutting |
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