Abstract
Effect of some newly synthesized modified ketonic resins on corrosion inhibition of stainless steel (SS) and copper (Cu) was investigated in acidic medium. Carboxyl, hydroxyl, and carbonyl functionalized resins have been coated on metal electrode as a thin film by dipping method. Corrosion characteristics of coating on SS (304 L) and Cu were investigated by polarization, open-circuit, and impedance measurement. These measurements performed at different time and the stability of polymeric coating were tested with time in acidic medium. The resin coating was able to protect both the SS and copper.
Highlights
The corrosion of metals is an enormous economic problem
All impedance spectra were measured at open circuit potential in the same medium frequency range between 105 and 5 · 10−3 Hz with an applied ac signal of 10 mV
Corrosion rate decreased and high inhibition was obtained, corrosion potential has almost not changed with MA-AF, CCAF, and AsCBAsF resins
Summary
The corrosion of metals is an enormous economic problem. efforts to develop more efficient and environmentally compliant methods to prevent corrosion have been ongoing throughout this century [1]. It is well known that surface characteristics are an important factor determining the corrosion stability of the organic coatings [10,11,12,13]. This factor affects the deposition behavior of the coatings. There are plenty of resins on the market, modern coating technology is focused to the need of development of high-performance polymeric materials [14,15,16,17,18,19]. The aim of this work was to investigate corrosion performances of these carboxyl, hydroxyl, and carbonyl functional group containing ketonic resin coatings on SS and copper. The use of Tafel extrapolation is not recommended for polymercoated electrode due to ohmic drop through the film, these measurements were performed for qualitative information and icor and Ecorr changes for different polymeric coatings were compared each other and bare electrode
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