کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1469934 | 1510040 | 2012 | 12 صفحه PDF | دانلود رایگان |
Ultrathin films of various compounds were prepared on galvanized steel coated with both phytic acid (PA) and diethylene triamine pentamethane phosphonic acid (DETPMPS) self-assembled monolayers (SAM), and in the presence of small amounts of special salt (MnSO4 or Cr(NO3)3). Phytic acid and phytic acid–Mn2+ were modified with dithio-oxamide (DTOA) and 2,3-dimercapto-1-propanol (DMP). Tafel plots and impedance measurements were used. Most investigated conversion coatings of the samples pretreated only in H2SO4/H2O2-mixture, showed that the protective efficiency values (P%) are greater than those of pretreated in both hot alkaline solution and H2SO4/H2O2-mixture.
► Protection of galvanized steel from corrosion in NaCl solution using coating films.
► Effect of pretreatment samples (before coating) on protective efficiency.
► Pretreatment samples in H2SO4/H2O2-mixture show higher protective efficiency.
► Modification of phytic acid self-assembled monolayer using some cations and thiols.
► Dimercaptopropanol conversion coating layer exhibit higher protective efficiency.
Journal: Corrosion Science - Volume 55, February 2012, Pages 339–350