ارزیابی اثر ضدخوردگی نانوپیگمنت های پایه رُسی اصلاح شده با ترکیبات آلی آزولی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری ، مهندسی پلیمر ، دانشگاه آزاد اسلامی واحد تهران جنوب

2 دانشگاه آزاد اسلامی واحد تهران جنوب

/amnc.2018.6.23.3

چکیده

چکیده
در این تحقیق نانوذرات رُس مونت موریلونیت سدیمNa+- MMT)) توسط بازدارنده های خوردگی آزولی نظیر 2ـ مرکاپتو بنزوتی آزول (MBT) و 2ـ مرکاپتوبنزایمیدازول (MBI) از طریق واکنش تبادل یونی اصلاح سطحی گردید و به عنوان نانوپیگمنت های ضدخوردگی داخل رزین اپوکسی به کار گرفته شد. از آزمون های انکسار اشعه ایکس زاویه کوچک (SAXS) و میکروسکوپ الکترونی عبوری (TEM) برای ارزیابی پراکنش نانوپیگمنت های هیبریدی در داخل ماتریس پوشش استفاده شد و مورفولوژی ساختاری ترکیبات توسط آزمــون میکروسکوپ الکترونی روبشی (SEM) بررسی شد. از آزمــون های طیف سنجی امپدانس الکتروشیمیایی (EIS) و مه نمکی نیز برای بررسی رفتار خوردگی نانو پوشش ها در محیط خورنده محلول %5/3 کلرید سدیم استفاده گردید و همچنین آزمون سنجش زاویه تماس برای ارزیابی میزان آبدوستی و آبگریزی سطوح فولادی پوشش شده با و بدون ترکیبات رُسی بهینه شده با ترکیبات آزولی استفاده شد. نتایج حاکی از آن بوده که پوشش اپوکسی حاوی 3 درصد وزنی از نانوپیگمنت MMT+MBT در مقایسه پوشش اپوکسی حاوی 3 درصد وزنی از نانوپیگمنت MMT+MBI و پوشش اپوکسی خالص پس از 60 روز غوطه وری در محیط خورندة مذکور دارای عملکرد ضدخوردگی بالاتری بود و حضور این نانوپیگمنت، موجب افزایش آبگریزی سطح مربوطه گردید.

کلیدواژه‌ها

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