Study on an elaborated method to improve corrosion resistance of zinc phosphate coating |
کد مقاله : 1337-IMES-CONGR-FULL (R1) |
نویسندگان: |
لیلا فتح یونس *1، مازیار آزادبه2 1مراغه، شهرک ولیعصر، خیابان 48 متری شهید دهقان، پلاک 121 2عضو هیئت علمی دانشگاه صنعتی سهند |
چکیده مقاله: |
Coating with a dense and fine grain structure containing fewer defects, due to limiting pathways between the environment and base metal, shows more improved protection properties. The major aim of present research was to exposure of an innovative method that called rephosphating with obvious influence on the formation of very fine crystalline zinc phosphate coating on the plain carbon steel. The SEM observations showed a very fine crystalline coating, using the purposed method. Furthermore, the protection properties of phosphated and rephosphated samples were described and compared through the Neutral Salt Spray (NSS) test and the electrochemical measuring techniques such as polarization and Electrochemical Impedance Spectroscopy (EIS). The results showed that rephosphating method has beneficial influence on the improving of corrosion resistance in compared with phosphating method. As well, improved paint adhesion for rephosphated sample was observed in compare with phosphated sample. The outstanding point of this investigation in compare to the others was to refer and highlight the significant effect of surface texture circumstance in obtaining coating with improved protective properties, while in the other research activities the similar purpose have been achieved mostly through optimizing bath chemical composition. |
کلیدواژه ها: |
plain carbon steel, zinc phosphate coating, rephosphating, fine grain size structure, corrosion resistance, paint adhesion |
وضعیت : مقاله برای ارائه به صورت پوستر پذیرفته شده است |