Poly(o-aminobenzyl alcohol) Films with and without Organic Compound on AISI 316 Surface; Synthesis and the Corrosion Performances

Abstract

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 oaminobenzyl 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.

Nanoparticle and Schiff Base Compound in Poly(O-Aminobenzyl Alcohol) Coating for Protection of 316L Stainless Steel against Corrosion

“…It was found that the film growth curves of PABA and PABA-ORG homopolymer films exhibited the highest monomer oxidation peak intensity in the first anodic cycles. Moreover, monomer oxidation peak intensities recorded for the ABA+ORG compound mixture were comparatively higher when compared with that of only the ABA medium [48]. In this study, the peak current increases of monomer oxidation obtained for ABA+NP and ABA+ORG+NP conditions were also significantly higher in the first anodic cycles, while they decreased with increasing cycle numbers.…”

“…Ozyilmaz et al [48] synthesized PABA film in ACN containing 0.15 M LiClO4 supporting electrolyte without and with different amounts of the same ORG compound on the SS electrode. It was found that the film growth curves of PABA and PABA-ORG homopolymer films exhibited the highest monomer oxidation peak intensity in the first anodic cycles.…”

“…In azomethine derivatives as a corrosion inhibitor, the C=N linkage is essential for composing a thin adsorbed layer on the substrate. At the same time, a polymeric structure formed by the bonding of such a group with a monomer shows extremely high corrosion protection [44][45][46][47][48]. In our previous study, it was shown that an organic structure such as the norephedrine-based amino alcohol compound can be added to the matrix of conductive polypyrrole film [47,48].…”

“…At the same time, a polymeric structure formed by the bonding of such a group with a monomer shows extremely high corrosion protection [44][45][46][47][48]. In our previous study, it was shown that an organic structure such as the norephedrine-based amino alcohol compound can be added to the matrix of conductive polypyrrole film [47,48]. The presence of an azomethine group (-C=N-) in organic compounds enhances the adsorption ability and barrier efficiency of the PABA film containing ORG [44][45][46].…”

“…The ORG, which may have to fill the pores of the PABA polymeric structure, also contributes to more electron transfer. Thus, it will allow the electrode surface to remain passive for a long time through the formation of oxide films on the stainless-steel surface [44][45][46][47][48]. Besides, the addition of nanomaterials to the interchain space of poly (o-aminobenzyl alcohol), a derivative of polyaniline can significantly improve the mechanical and anti-corrosion properties of the poly (o-aminobenzyl alcohol) filmcontaining coating For this purpose, the novelty of this study is to investigate the synthesis and anticorrosive properties of poly (o-aminobenzyl alcohol) film in the presence of both Schiff base and nanoparticle, and there is no report about both doped conductive polymer in the literature.…”