بهینه سازی خواص ضد خوردگی پوشش های اپوکسی حاوی پیگمنت زینک فسفات و نانو سیلیکا

میرزابابایی, سیامک; کلایی, محمدرضا

بهینه سازی خواص ضد خوردگی پوشش های اپوکسی حاوی پیگمنت زینک فسفات و نانو سیلیکا

نوع مقاله : پژوهشی اصیل

نویسندگان

سیامک میرزابابایی ¹

محمدرضا کلایی ²

¹ دانشگاه آزاد اسلامی- واحد تهران جنوب- گروه مهندسی پلیمر

² دانشگاه آزاد اسلامی واحد تهران جنوب- گروه مهندسی پلیمر

چکیده

در این پژوهش به بررسی خواص ضد خوردگی پوشش های اپوکسی حاوی زینک فسفات (به عنوان عامل ضد خوردگی) به همراه نانو سیلیکای آبگریز با ترکیب درصد های مختلف با استفاده از روش طراحی آزمایش تاگوچی پرداخته خواهد شد. خواص ضد خوردگی پوشش های اپوکسی تحت تاثیر فاکتورهای بسیار مهم مانند درصد نانوسیلیکا، درصد پیگمنت ضد خوردگی و نسبت پیگمنت به رزین بر اساس روش تاگوچی مدل 9L مورد تجزیه تحلیل قرار گرفت. خواص ضدخوردگی پوشش اپوکسی توسط آزمون طیف سنجی امپدانس الکتروشیمیایی (EIS) در محلول آبی NaCl 5/3 درصد و آزمون مه نمکی (سالت اسپری) مورد بررسی قرار گرفتند. میکروسکوپ الکترونی روبشی (SEM) به منظور بررسی نحوه توزیع و پخش ذرات نانو سیلیکا در رزین اپوکسی استفاده شد. بر اساس نتایج به دست آمده از آزمون های خوردگی برمبنای نمودارهای نایکوئیست تعیین شرایط بهینه نشان می دهد که نمونه حاوی 8% پیگمنت زینک فسفات و 3% نانو سیلیکا و نسبت پیگمنت به رزین 1 بیشترین مقاومت به خوردگی را نشان می دهد. از طرفی این طلب در خصوص آزمون مه نمکی نمونه ها مشاهده شد که اضافه کردن همزمان زینک فسفات و نانوسیلیکا به رزین اپوکسی سبب کاهش تاول ها و محصولات خوردگی شده است و بهترین خواص ضد خوردگی زمانی مشاهده شد که از 8 درصد زینک فسفات، 3 درصد نانو سیلیکا و نسبت پیگمنت به رزین 1 استفاده شده بود. نتایج به دست آمده در این پژوهش حاکی از آن است که خواص بازدارندگی زینک فسفات و خواص ممانعتی ناشی از حضور نانوسیلیکا در پوشش اپوکسی تاثیر بسزایی در کاهش میزان خوردگی را دارا می باشند.

کلیدواژه‌ها

خوردگی پوشش اپوکسی

پیگمنت زینک فسفات

روش تاگوچی

نانو سیلیکا

موضوعات

نانو کامپوزیت

عنوان مقاله English

Optimization of anti- Corrosion of Epoxy/Zinc Phosphate and Nano Silica coating

نویسندگان English

Siamak Mirzababaei ¹

Mohammadreza Kalaee ²

¹ Polymer Engineering Group, Faculty of Engineering, South Tehran Branch, Islamic Azad University

² Polymer Engineering Group, Faculty of Engineering, South Tehran Branch, Islamic Azad University

چکیده English

Research subject: In this research we studied the anti-corrosion properties of epoxy coating containing anti-corrosion pigment zinc phosphate with hydrophobic nano silica with different percentage also for determine the optimal conditions for preparation of nanocomposite Taguchi experimental design method was used.

Research approach: Anti-corrosion properties of epoxy coating under the influence of very important factors such as the percentage of nano silica, anticorrosive pigment and pigment to resin ratio according to model L9 taguchi method was studied and analyzed. Anti-corrosion properties of epoxy coatings were studied by electrochemical impedance spectroscopy test (EIS) in 3/5% NaCl aqueous solution and salt fog test (salt spray). To investigate the distribution of nano silica particles in epoxy resin were analyzed by transmion electron microscope (TEM) and scanning electron microscope (SEM). The results show that using from zinc phosphate and nano-silica was able to improve the corrosion resistances.

Main results:Results shows that addition of zinc phosphate and nano silica to epoxy resin caused a decrease in number of blisters and corrosion products after exposure to corrosion test based on the results in Nyquist and Bode plots, also the similarity in results was observed for the epoxy coating loaded according to the optimum conditions with 8% zinc phosphate, 3% nano silica and pigment to resin ratio of one according to salt spary. The significance levels of the experimental parameters, which indicate how the factors affect the compressive addition of zinc phosphate and nano silica to epoxy resin, were determined by using variance (Anova) method.

کلیدواژه‌ها English

Corrosion of Epoxy Coating

Zinc Phosphate Pigment

Taguchi method

Nano Silica

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