اکسیداسیون الکترولیتی پلاسمایی آلیاژ آلومینیوم T32024 و بررسی مقاومت به خوردگی و خصوصیات سطحی

نوع مقاله : علمی و پژوهشی

نویسندگان

• حسین فدائی
• مهدی جاویدی

دانشگاه شیراز

10.22067/ma.v26i1.17757

چکیده

در این تحقیق، پوشش‌دهی آلیاژ آلومینیم 2024-T3 به‌کمک روش اکسایش الکترولیتی پلاسمایی بررسی شده است. الکترولیت مورد استفاده، محلولی قلیایی از افزودنی‌های سیلیکات، فسفات، هیدرواکسید پتاسیوم و گلیسرین بود و از منبع جریان DC با ولتاژ اعمالی پایین استفاده شد. مقاومت به خوردگی نمونه‌ها به‌کمک آزمون‌های پلاریزاسیون و طیف‌سنجی اَمپدانس الکتروشیمیایی، و مقاومت به سایش آن‌ها، به‌روش پین بر روی دیسک بررسی شد. افزون بر این، مُرفولوژی سطح و مقطع عرضی لایه‌ی اکسیدی به‌کمک میکروسکُپ الکترونی روبشی مطالعه شد. نتایج نشان دادند که پس از فرایند اکسایش الکترولیتی پلاسمایی، مقاومت به خوردگی و سایش آلیاژ بهبود می‌یابد.

کلیدواژه‌ها

• اکسیداسیدن الکترولیتی پلاسمایی
• آلیاژ آلومینیوم
• محلول قلیایی
• خوردگی

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عنوان مقاله [English]

Plasma Electrolytic Oxidation of 2024-T3 Aluminum Alloy and Study of Its Corrosion Resistance and Tribological Behavior

نویسندگان [English]

• hossein fadaee
• mehdi javidi

University shiraz

چکیده [English]

In this study, plasma electrolytic oxidation of 2024-T3 aluminum alloy was investigated. The electrolyte used in this investigation was an alkaline solution containing additives of silicate, phosphate, potassium hydroxide and glycerin. A conventional DC power source with a low applied voltage was employed. Corrosion resistance of the oxide layer was investigated by means of Tafel plots and electrochemical impedance spectrometry. Furthermore, the wear resistance was investigated by pin on disc method. The surface and cross-sectional morphology of the oxide layer was also investigated by scanning electron microscopy. The composition of the oxide layer was studied by XRD. The results showed that after plasma electrolytic oxidation, the corrosion and wear resistance of the alloy are improved.

کلیدواژه‌ها [English]

• Plasma electrolytic oxidation
• aluminum alloy
• alkaline solution
• corrosion

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