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The corrosion behavior of PEG doped ammonium difluoride modified Pby coating

 Last Update: 2020-11-03
 Source: Internet
 Author: User

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In a new study, a polypropylene (Ppy) coating embedded with ammonium difluoride (Ppy doped) doped with polyethyl glycol (PEG) was deposited on an AZ31 magnesium alloy using a circular vian method.
fluoride-magnetic resonance (F-NMR), thermal re-analysis (TGA) and differential scanning thermal (DSC) results showed that fluoride doping in polyglycol molecules was implemented. The corrosion properties of doped Pby coatings are assessed using the electrochemical impedance spectrum (EIS) and dynamic-inductive polarization techniques in the 0.05M NaCl solution

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doped Pby coatings are more resistant to corrosion
field emission scanning electron microscopes (FESEM) and energy dispersion X-ray spectroscopy (EDS) indicate that doped Pby coatings are more resistant to corrosion than Pby coatings. The charge transfer resistance of the doped Pby coating is about 2 and 5 times higher than that of the un doped Pby and Pby coatings, respectively, which is related to the synergetic behavior of fluoride and polyethyl glycol and its release to the anode region.
The study was published in Progress in Organic Coatings, volume 134, September 2019, pp. 22-32.

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