دورية أكاديمية
Effect of Micro - Arc Oxidation and Sealing Treatment on the Corrosion Resistance of Cast Al - Cu - Mg - Ag Alloy
| العنوان: | Effect of Micro - Arc Oxidation and Sealing Treatment on the Corrosion Resistance of Cast Al - Cu - Mg - Ag Alloy |
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| المؤلفون: | ZENG Di - ping, LIU Zhi - yi, WU Hai - jiang, GUO Wen - min, CHEN Dong - rui |
| المصدر: | Cailiao Baohu, Vol 55, Iss 8, Pp 117-124 (2022) |
| بيانات النشر: | Editorial Department of Materials Protection, 2022. |
| سنة النشر: | 2022 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials LCC:Technology |
| مصطلحات موضوعية: | micro - arc oxidation, sealing treatment, electrochemical test, tensile strength, corrosion resistance, Materials of engineering and construction. Mechanics of materials, TA401-492, Technology |
| الوصف: | In order to enhance the corrosion resistance of the cast Al - Cu - Mg - Ag alloy, a micro - arc oxidation (MAO) coating was prepared on the surface of the alloy and then sealed with silicone epoxy resin. The corrosion resistance of the Al - MAO coating system before and after sealing treatment was analyzed by electrochemical test, salt spray test and full immersion test. Results showed that after the corrosion test, the cast Al - Cu - Mg - Ag alloy corroded seriously, a large number of corrosion pits appeared along the grain boundary, and the tensile strength of alloy decreased by about 60 MPa; as for the Al - MAO coating system, the corrosion medium corroded the alloy substrate through the micro pores on the surface of the coating, a large number of white spot - like corrosion products appeared on the surface, and its tensile strength decreased by about 25 MPa. The effects of sealing treatment on the Al - MAO coating were as follows: the corrosion current density reduced from 2.62×10-8A/cm2 to 5.52×10-12A/cm2; the corrosion potential positively shifted from -589 mV to -342 mV; the low - frequency impedance increased from～105 Ω·cm2 to ～109 Ω·cm2; after the salt spray test and the full immersion test, no corrosion occurred; and the tensile strength basically remained the same. After the sealing treatment, the surface defects of the MAO coating were sealed, and a dense ceramic - organic composite coating formed on the alloy surface, which greatly reduced the corrosion rate and significantly improved the corrosion resistance of the alloy system. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | Chinese |
| تدمد: | 1001-1560 |
| Relation: | http://www.mat-pro.com/fileup/1001-1560/PDF/20220818.pdf; https://doaj.org/toc/1001-1560 |
| DOI: | 10.16577/j.issn.1001-1560.2022.0224 |
| URL الوصول: | https://doaj.org/article/28ff9108a3874d9cb97c19d55943c4ed |
| رقم الأكسشن: | edsdoj.28ff9108a3874d9cb97c19d55943c4ed |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 10011560 |
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| DOI: | 10.16577/j.issn.1001-1560.2022.0224 |