کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5362006 | 1388280 | 2009 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical nature of phytic acid conversion coating on AZ61 magnesium alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
Phytic acid (PA) conversion coating on AZ61 magnesium alloy was prepared by the method of deposition. The influences of pH, time and PA concentration on the formation process, microstructure and properties of the conversion coating were investigated. Scanning electron microscopy (SEM) was used to observe the microstructure. The chemical nature of conversion coating was investigated by energy dispersive X-ray spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR) techniques. The corrosion resistance was examined by means of potentiodynamic polarization method. The adhesive ability was tested by score experiments. The results showed that the growth and microstructure of the conversion coatings were all obviously affected by pH, time and PA concentration. In 0.5Â mg/ml PA solution with a pH of 5, an optimization conversion coating formed after 20Â min immersion time by deposition of PA on AZ61 magnesium alloy surface through chelating with Al3+. It made the corrosion potential Ecorr of sample shifted positively about 171Â mV than that of the untreated sample, and the adhesive ability reached to Grade 1 (in accordance with GB/T 9286).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 255, Issue 20, 30 July 2009, Pages 8363-8371
Journal: Applied Surface Science - Volume 255, Issue 20, 30 July 2009, Pages 8363-8371
نویسندگان
Fusheng Pan, Xu Yang, Dingfei Zhang,