نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، مهندسی مواد، دانشکده علوم و فناوری، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان، ایران

2 استادیار گروه فلزات، پژوهشکده مواد، پژوهشگاه علوم و تکنولوژی پیشرفته و علوم محیطی، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان، ایران

3 دانشیار بخش شیمی، پژوهشگاه علوم و تکنولوژی پیشرفته و علوم محیطی، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان، ایران

چکیده

در این پژوهش یک فیلم یکنواخت پلی پیرول کادمیم اکساید/ نانولوله کربنی برای محافظت از فولاد زنگ نزن آستنیتی 304 در مقابل خوردگی در محیط اسیدی 0.5 مولار هیدروکلریک اسید تولید شد. برای این منظور از روش رسوب‌شیمیایی برای سنتز CNT/CdO استفاده شد. از روش سنتز الکتروشیمیایی برای پوشش دهی سطح فولاد و یافتن شرایط بهینه آن استفاده شد. از آزمون‌های پلاریزاسیون برای به دست آوردن میزان بهینه نانو کامپوزیت استفاده شد. برای بررسی‌های مورفولوژیکی از میکروسکپ نوری و میکروسکپ الکترونی روبشی SEM استفاده شد. نتایج نشان می‎دهند که نانو کامپوزیت نهایی از مقاومت خوبی در مقابل خوردگی برخوردار است و وجود CNT/CdO درزمینهٔ پلیمری میزان تخلخل فیلم پوششی را کاهش داد. همچنین نتایج بیان کردند که چگالی جریان بهینه اعمالی برای پوشش دهی و pH بهینه برای آماده سازی محلول الکتروپلیمریزاسیون به ترتیب مقادیر mA/cm24 و 9 است. مقدار 0.5% وزنی_ حجمی نانولوله کربنی عامل دار شده با کادمیم اکساید بهینه تقویت کننده نانو کامپوزیتی در زمینه پلی پیرول تعیین شد. پوشش نانو کامپوزیت پلی پیرول نانولوله کربنی/کادمیم اکساید تشکیل شده بر سطح فولاد زنگ نزن آستنیتی 304 بیش از 98% از خوردگی آن در محلول 0.5 مولار هیدروکلریک اسید محافطت کرد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Production of uniform nanocomposite coating of polypyrrole carbon nanotube/ cadmium oxide to protect corrosion of austenitic stainless steel 304

نویسندگان [English]

  • MohammadAli SarfeJoo 1
  • Alireza Mahmoudian 2
  • Dariush Afzali Gorouh 3

1 Department of materials engineering, Graduate University of Advanced Technology, Kerman, Iran

2 Department of materials engineering, Graduate University of Advanced Technology, Kerman, Iran

3 Department of materials engineering, Graduate University of Advanced Technology, Kerman. Iran

چکیده [English]

In this research, a uniform film of polypyrrole/CNT/cadmium oxide nanocomposite was produced to protect the austenitic stainless steel 304 against corrosion in 0.5 molar hydrochloric acid medium. For this purpose, the chemical deposition method was used for CNT / CdO synthesis. Electrochemical synthesis method was used to coat the stainless steel and to find optimal coating conditions. Polarization tests were used to find the optimum amount of reinforcement nanocomposite. Optical microscope and scanning electron microscope (SEM) were used to study the morphology of coating. Results showed that the final nano composite had a remarkable corrosion resistance and the presence of CNT / CdO reduced the porosities in the final polymer film. Also coating results showed that the optimum amount of apply current density and pH for electropolymerization were 4mA/cm2 and 9 respectively. The 0.5% weight-volumetric functionalized carbon nanotube with Cadmium Oxide was determined as optimum amount of nano composite reinforcement using a polypyrrole matrix. Polypyrrole Carbon nanotube/Cadmium Oxide nanocomposite coating on the surface of austenitic stainless steel 304 protected more than 98% against corrosion in a 0.5 M solution hydrochloric acid.

کلیدواژه‌ها [English]

  • Polarization
  • Carbon nanotube/Cadmium Oxide
  • Polypyrrole & morphology

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