کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
176063 458931 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanistic approach for evaluation of the corrosion inhibition of potassium zinc phosphate pigment on the steel surface: Application of surface analysis and electrochemical techniques
ترجمه فارسی عنوان
روش مکانیکی برای ارزیابی مهار خوردگی رنگدانه روی فسفات پتاسیم روی سطح فولاد: کاربرد تجزیه و تحلیل سطح و تکنیک های الکتروشیمیایی
کلمات کلیدی
پتاسیم روی فسفات، فولاد، مهار خوردگی، آزمون قطبی شدن، طیف سنجی فوتوالکترون اشعه ایکس، طیف سنج نوری پلاسما
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Potassium zinc phosphate pigment was synthesized through a co-precipitation method.
• The corrosion inhibition mechanism of the pigment was studied.
• The pigment showed good solubility in water and releasing inhibitive species.
• Both the anodic and cathodic reaction rates decreased in the presence of the pigment.
• The inhibitive mechanism of the pigment changed at short and long immersion times.

Potassium zinc phosphate pigment was synthesized through a co-precipitation method. Then, the steel panels were immersed in 3.5% NaCl solution containing potassium zinc phosphate pigment extract and in the blank 3.5% NaCl solution (containing no pigment) at different immersion times. X-ray diffraction and scanning electron microscope were employed in order to characterize the composition and morphology of the pigment. Corrosion inhibition of the pigment in the extract solution was studied by linear polarization test. The morphology and composition of the film precipitated on the surface of steel panels were investigated by energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy techniques. Solubility of pigment in the extract solution and the rate of ions consumption were studied by employing an inductively coupled plasma-optical emission spectrometer.Results showed that potassium zinc phosphate has sufficient water solubility to provide corrosion inhibition on the steel surface. The inhibitive spices like Zn2+ and PO43− ions could form protective layer over the anodic and cathodic regions of the metal surface, restricting the aggressive species access to the metal surface. It was found that the inhibition mechanism of potassium zinc phosphate pigment changed during the immersion. Zn2+ ions precipitated on the anodic sites of metal surface at short immersion times affecting the anodic reaction rate but PO43− ions formed protective layer over the cathodic regions at longer immersion times affecting the cathodic reaction rate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 109, October 2014, Pages 189–199
نویسندگان
, , , ,