| Title: | Morphology and corrosion properties PVD Cr-N coatings deposited on aluminium alloys |
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| Authors: | ID Kek-Merl, Darja (Author)
ID Milošev, Ingrid (Author)
ID Panjan, Peter (Author)
ID Zupanič, Franc (Author)
ID Inštitut za kovinske materiale in tehnologije (Copyright holder) |
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| Files: |  Materiali_in_Tehnologije_2011_Merl_et_al._MORPHOLOGY_AND_CORROSION_PROPERTIES_PVD_Cr-N_COATINGS_DEPOSITED_ON_ALUMINIUM_ALLOYS.pdf (735,62 KB)
MD5: E4499D5D9DAB524DEFF96081874816BE
 http://mit.imt.si/Revija/izvodi/mit116/kekmerl.pdf
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FS - Faculty of Mechanical Engineering
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| Abstract: | The attempt to find an alternative coating for corrosion protection of Al- alloys was made. PVD coatings are one of the possible alternatives for replacement of ecological unfriendly chromate coatings. Chromium-nitride (Cr-N) and Ni/Cr-N coatings were sputtered on aluminium substrates (AA7075 and cladded AA2024). Surface and sub-surface characterizations were performed by AFM and SEM. Special attention was given to defects incorporated into coatings, since they play important role in the corrosion protection of the coating/substrate systems. The cross-sections through the typical defects were performed by ion beam milling incorporated into the SEM. The Vickers hardness of the Cr-N with and without layer of Ni on both substrates was determined. After the coatings deposition, the values of Vickers hardness (10 mN load) increase for 10 to 100-fold compared to the substrates. The corrosion behaviour of Cr-N and Ni/Cr-N thin films was investigated in near neutral 0.1 M solution of NaCl using potentiodynamics electrochemical measurement. Cr-N and Ni/Cr-N coatings shift the corrosion potentials to more positive values. The best corrosion resistance among the tested coating/substrate systems were found for Ni/Cr-N on AA7075 substrate. |
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| Keywords: | Al-alloys, corrosion properties, CrN films, FIB, PVD coatings |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Year of publishing: | 2011 |
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| Number of pages: | str. 593-597 |
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| Numbering: | Letn. 45, št. 6 |
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| PID: | 20.500.12556/DKUM-65202  |
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| ISSN: | 1580-2949 |
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| UDC: | 669.71:620.193 |
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| ISSN on article: | 1580-2949 |
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| COBISS.SI-ID: | 25468199 |
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| NUK URN: | URN:SI:UM:DK:LAFT0NVJ |
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| Publication date in DKUM: | 17.03.2017 |
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| Views: | 1542 |
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| Downloads: | 140 |
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| Metadata: |    |
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| Categories: | Misc.
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