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    Nanoparticle and Schiff Base Compound in Poly(O-Aminobenzyl Alcohol) Coating for Protection of 316L Stainless Steel against Corrosion
    (Trans Tech Publications Ltd, 2022) Ozyilmaz, Ali Tuncay; Celik, Cumali; Ozgen, Begum
    The electrochemical synthesis of poly (o-aminobenzyl alcohol) (PABA) coatings containing three different amounts of NiZnFe 4 O 4 nanoparticle (NP) with and without 0.25 mM Schiff base (ORG) on stainless steel (SS) was carried out in 0.15 M LiClO 4 containing acetonitrile (ACN) solution. The synthesis curves of PABA-NP and poly (o-aminobenzyl alcohol -Schiff basenanoparticle (PABA-ORG-NP) films exhibited the different current and monomer oxidation potential values indicating the presence of NP and ORG compounds. Besides, the addition of ORG to the NP -containing synthesis solution resulted in an increase in the electropolymerization rate of the PABA film compared to the NP -containing medium alone. Indeed, scanning electron microscopy (SEM) images of PABA-NP and PABA-ORG-NP also showed that their morphological structures were different. According to results of the evaluation of the impedance analysis, it was seen that PABA-NP and PABA-ORG-NP films provided significant physical barrier behavior to the SS electrode, in 3.5% NaCl solution. PABA-NP 25 and PABA-ORG-NP 25 coatings exhibited more protection behavior against the move of corrosive substances to SS. The presence of both NP and ORG in the polymer coating further improved the superior protection property of the PABA film, for a longer time.
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    Poly(O-aminobenzyl alcohol) films with and without organic compound on aisi 316 surface; synthesis and the corrosion performances
    (Turkish Chemical Society, 2020) Ozyilmaz, Ali Tuncay; Ozgen, Begüm; Celik, Cumali
    In this work, we obtained the anticorrosive properties of polymer films (SS/PABA and SS/PABA-ORG) synthesized on stainless steel surface by adding an organic substance to aniline derived o-aminobenzyl alcohol monomer synthesis medium. Firstly, we prepared the polymer coating bath by dissolving 0.15 M o-aminobenzyl alcohol monomer in the electrolyte solvent containing acetonitrile and 0.15 M LiClO4. From this bath, poly (o-aminobenzyl alcohol) (PABA) film was synthesized in 30 segments by cyclic voltammetry (CV) technique at a scanning rate of 50 mV/s at a potential range of-0.20/1.80 V on the AISI 316 (SS) working electrode in contrast to the platinum electrode. For the synthesis of organic structure doped polymer film (PABA-ORG), we repeated the same synthesis process by dissolving C21H27NO2(k) (ORG) at low concentration in the same bath. We investigated the corrosion performances of bare SS, SS/PABA, and SS/PABA-ORG substrates, using open circuit potential – time, anodic polarization, and AC impedance techniques in the solution of corrosion study. As a result, we observed that the organic additive added to the synthesis medium caused changes in the synthesis behavior of PABA. Corrosion performance tests showed that PABA and PABA-ORG films increased the corrosion protection performance of the SS electrode, and we observed a reduction of the corrosion rate of the SS electrode. © 2020, Turkish Chemical Society. All rights reserved.