Effect of the Electrolyte Temperature and the Current Density on a Layer Microhardness Generated by the Anodic Aluminium Oxidation
The paper investigates the influence of the chemical composition and temperature of electrolyte, the oxidation time, voltage, and the current density on Vickers microhardness of aluminium oxide layers, at the same time. The layers were generated in the electrolytes with different concentrations of s...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/659846 |
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| author | Emil Spišák Miroslav Gombár Ján Kmec Alena Vagaská Erika Fechová Peter Michal Ján Piteľ Daniel Kučerka |
| author_facet | Emil Spišák Miroslav Gombár Ján Kmec Alena Vagaská Erika Fechová Peter Michal Ján Piteľ Daniel Kučerka |
| author_sort | Emil Spišák |
| collection | DOAJ |
| description | The paper investigates the influence of the chemical composition and temperature of electrolyte, the oxidation time, voltage, and the current density on Vickers microhardness of aluminium oxide layers, at the same time. The layers were generated in the electrolytes with different concentrations of sulphuric and oxalic acids and surface current densities 1 A·dm−2, 3 A·dm−2, and 5 A·dm−2. The electrolyte temperature varied from −1.78°C to 45.78°C. The results have showed that while increasing the electrolyte temperature at the current density of 1 A·dm−2, the increase in the layer microhardness values is approximately by 66%. While simultaneously increasing the molar concentration of H2SO4 in the electrolyte, the growth rate of the microhardness value decreases. At the current density of 3 A·dm−2, by increasing the electrolyte temperature, a reduction in the microhardness of the generated layer occurs with the anodic oxidation time less than 25 min. The electrolyte temperature is not significant with the changing values of the layer microhardness at voltages less than 10.5 V. |
| format | Article |
| id | doaj-art-8d660b94f45c44a58680b815cb6e0ab8 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-8d660b94f45c44a58680b815cb6e0ab82025-02-03T05:59:30ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422015-01-01201510.1155/2015/659846659846Effect of the Electrolyte Temperature and the Current Density on a Layer Microhardness Generated by the Anodic Aluminium OxidationEmil Spišák0Miroslav Gombár1Ján Kmec2Alena Vagaská3Erika Fechová4Peter Michal5Ján Piteľ6Daniel Kučerka7Department of Technologies and Materials, Faculty of Mechanical Engineering, Technical University of Košice, Mäsiarska 74, 042 00 Košice, SlovakiaThe Department of Mechanical Engineering, Institute of Technology and Businesses in České Budějovice, Okružní 10, 37001 České Budějovice, Czech RepublicThe Department of Mechanical Engineering, Institute of Technology and Businesses in České Budějovice, Okružní 10, 37001 České Budějovice, Czech RepublicDepartment of Mathematics, Informatics and Cybernetics, Faculty of Manufacturing Technologies with a Seat in Prešov, Technical University of Košice, Bayerova 1, 080 01 Prešov, SlovakiaDepartment of Mathematics, Informatics and Cybernetics, Faculty of Manufacturing Technologies with a Seat in Prešov, Technical University of Košice, Bayerova 1, 080 01 Prešov, SlovakiaDepartment of Mathematics, Informatics and Cybernetics, Faculty of Manufacturing Technologies with a Seat in Prešov, Technical University of Košice, Bayerova 1, 080 01 Prešov, SlovakiaDepartment of Mathematics, Informatics and Cybernetics, Faculty of Manufacturing Technologies with a Seat in Prešov, Technical University of Košice, Bayerova 1, 080 01 Prešov, SlovakiaThe Department of Mechanical Engineering, Institute of Technology and Businesses in České Budějovice, Okružní 10, 37001 České Budějovice, Czech RepublicThe paper investigates the influence of the chemical composition and temperature of electrolyte, the oxidation time, voltage, and the current density on Vickers microhardness of aluminium oxide layers, at the same time. The layers were generated in the electrolytes with different concentrations of sulphuric and oxalic acids and surface current densities 1 A·dm−2, 3 A·dm−2, and 5 A·dm−2. The electrolyte temperature varied from −1.78°C to 45.78°C. The results have showed that while increasing the electrolyte temperature at the current density of 1 A·dm−2, the increase in the layer microhardness values is approximately by 66%. While simultaneously increasing the molar concentration of H2SO4 in the electrolyte, the growth rate of the microhardness value decreases. At the current density of 3 A·dm−2, by increasing the electrolyte temperature, a reduction in the microhardness of the generated layer occurs with the anodic oxidation time less than 25 min. The electrolyte temperature is not significant with the changing values of the layer microhardness at voltages less than 10.5 V.http://dx.doi.org/10.1155/2015/659846 |
| spellingShingle | Emil Spišák Miroslav Gombár Ján Kmec Alena Vagaská Erika Fechová Peter Michal Ján Piteľ Daniel Kučerka Effect of the Electrolyte Temperature and the Current Density on a Layer Microhardness Generated by the Anodic Aluminium Oxidation Advances in Materials Science and Engineering |
| title | Effect of the Electrolyte Temperature and the Current Density on a Layer Microhardness Generated by the Anodic Aluminium Oxidation |
| title_full | Effect of the Electrolyte Temperature and the Current Density on a Layer Microhardness Generated by the Anodic Aluminium Oxidation |
| title_fullStr | Effect of the Electrolyte Temperature and the Current Density on a Layer Microhardness Generated by the Anodic Aluminium Oxidation |
| title_full_unstemmed | Effect of the Electrolyte Temperature and the Current Density on a Layer Microhardness Generated by the Anodic Aluminium Oxidation |
| title_short | Effect of the Electrolyte Temperature and the Current Density on a Layer Microhardness Generated by the Anodic Aluminium Oxidation |
| title_sort | effect of the electrolyte temperature and the current density on a layer microhardness generated by the anodic aluminium oxidation |
| url | http://dx.doi.org/10.1155/2015/659846 |
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