Effect of High-pressure Torsion on Corrosion Behavior of a Solution-treated Al-Mg-Sc Alloy in a Saline Solution
The effect of the increase in crystalline defects in the structure generated by high-pressure torsion (HPT) on the corrosion behavior of metallic materials is not well understood. This report evaluates the influence of HPT on the corrosion behavior of a solution treated Al-3wt% Mg-0.2wt% Sc alloy in...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2019-11-01
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| Series: | Materials Research |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000500221&tlng=en |
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| author | Michelle Dias Alves Lage Renata Braga Soares Pedro Henrique R. Pereira Roberto B. Figueiredo Vanessa Freitas C. Lins Terence G. Langdon |
| author_facet | Michelle Dias Alves Lage Renata Braga Soares Pedro Henrique R. Pereira Roberto B. Figueiredo Vanessa Freitas C. Lins Terence G. Langdon |
| author_sort | Michelle Dias Alves Lage |
| collection | DOAJ |
| description | The effect of the increase in crystalline defects in the structure generated by high-pressure torsion (HPT) on the corrosion behavior of metallic materials is not well understood. This report evaluates the influence of HPT on the corrosion behavior of a solution treated Al-3wt% Mg-0.2wt% Sc alloy in a 3.5 wt./v.% NaCl solution. The electrochemical behavior of the alloy was evaluated using cyclic polarization, electrochemical impedance spectroscopy (EIS), Mott Schottky, X-ray photoelectron spectroscopy, and chronoamperometry testing. The passive current density decreased after HPT processing, indicating a more protective oxide layer was formed on the surface of the HPT-processed alloy. Mott Schottky analysis confirmed the higher protection efficiency of the passive layer on the HPT-processed alloy. The film formed in the solution-treated alloy was a p-type and an n-type semiconductor while the alloy processed by HPT exhibited only an n-type semiconductor behavior. EIS showed that corrosion resistance in a saline medium increased with HPT processing. |
| first_indexed | 2024-04-11T17:27:23Z |
| format | Article |
| id | doaj.art-f74b9d73f40941339bd0bec736e84999 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-04-11T17:27:23Z |
| publishDate | 2019-11-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-f74b9d73f40941339bd0bec736e849992022-12-22T04:12:18ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392019-11-0122510.1590/1980-5373-mr-2019-0343Effect of High-pressure Torsion on Corrosion Behavior of a Solution-treated Al-Mg-Sc Alloy in a Saline SolutionMichelle Dias Alves LageRenata Braga Soareshttps://orcid.org/0000-0002-3625-4307Pedro Henrique R. PereiraRoberto B. FigueiredoVanessa Freitas C. Linshttps://orcid.org/0000-0002-6357-9553Terence G. LangdonThe effect of the increase in crystalline defects in the structure generated by high-pressure torsion (HPT) on the corrosion behavior of metallic materials is not well understood. This report evaluates the influence of HPT on the corrosion behavior of a solution treated Al-3wt% Mg-0.2wt% Sc alloy in a 3.5 wt./v.% NaCl solution. The electrochemical behavior of the alloy was evaluated using cyclic polarization, electrochemical impedance spectroscopy (EIS), Mott Schottky, X-ray photoelectron spectroscopy, and chronoamperometry testing. The passive current density decreased after HPT processing, indicating a more protective oxide layer was formed on the surface of the HPT-processed alloy. Mott Schottky analysis confirmed the higher protection efficiency of the passive layer on the HPT-processed alloy. The film formed in the solution-treated alloy was a p-type and an n-type semiconductor while the alloy processed by HPT exhibited only an n-type semiconductor behavior. EIS showed that corrosion resistance in a saline medium increased with HPT processing.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000500221&tlng=enAluminum alloycorrosionhigh-pressure torsionultrafine microstructure |
| spellingShingle | Michelle Dias Alves Lage Renata Braga Soares Pedro Henrique R. Pereira Roberto B. Figueiredo Vanessa Freitas C. Lins Terence G. Langdon Effect of High-pressure Torsion on Corrosion Behavior of a Solution-treated Al-Mg-Sc Alloy in a Saline Solution Materials Research Aluminum alloy corrosion high-pressure torsion ultrafine microstructure |
| title | Effect of High-pressure Torsion on Corrosion Behavior of a Solution-treated Al-Mg-Sc Alloy in a Saline Solution |
| title_full | Effect of High-pressure Torsion on Corrosion Behavior of a Solution-treated Al-Mg-Sc Alloy in a Saline Solution |
| title_fullStr | Effect of High-pressure Torsion on Corrosion Behavior of a Solution-treated Al-Mg-Sc Alloy in a Saline Solution |
| title_full_unstemmed | Effect of High-pressure Torsion on Corrosion Behavior of a Solution-treated Al-Mg-Sc Alloy in a Saline Solution |
| title_short | Effect of High-pressure Torsion on Corrosion Behavior of a Solution-treated Al-Mg-Sc Alloy in a Saline Solution |
| title_sort | effect of high pressure torsion on corrosion behavior of a solution treated al mg sc alloy in a saline solution |
| topic | Aluminum alloy corrosion high-pressure torsion ultrafine microstructure |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000500221&tlng=en |
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