Inhibition Effects of Some Organic Compounds on Zinc Corrosion in 3.5% NaCl

Abstract

The inhibition of zinc corrosion in 3.5% NaCl solution by some organic compounds (sodium dodecylsulphate (SDS), sodium dodecylbenzosulphonate (SDBS) and sodium 1,4-bis(2-etylhexyl) sulphosuccinate (AOT)) was investigated. The inhibition efficiencies were determined by polarization measurements of the zinc electrode in the solution. Electrochemical impedance spectroscopy (EIS) was also used for electrochemical studies of zinc electrode in this medium. The results showed that the used surfactants inhibit the cathodic reaction of hydrogen evolution and at low anodic overvoltage the corrosion process is under activation control, while at high anodic overvoltage the process is under diffusion control.

Amperometric urea biosensor based on platinum electrode modified with a nanocomposite film

“…1, three anodic oxidation peaks and three cathodic reduction peaks, which correspond to the three forms of PANI redox, appear on the cyclic voltammograms. [1][2][3][4][5] These oxidation and reduction processes are enhanced by the presence of CNTsF, which improve the conductivity of the nanocomposite film. The CPs doped with CNTsF exhibit dramatically different electronic properties compared with CPs prepared with small anionic dopants.…”

Adsorption and Inhibitive Corrosion Properties of Some New Polymeric Compounds as Green Inhibitors on Carbon Steels in Cooling Water Systems

“…The symbol 'S' denotes the electrolyte or any specifically adsorbed ions and the symbol 'I' denotes the organic inhibitor. The step (9) would be the mode of inhibition, which has been designated as "blocking"or adsorption, while the steps (8) and (10) are the surface chelate modes. If the process described by (10) is the dominant mechanism for the production of chelate, then the formation of chelate would be enhanced by increased coverage of both adsorbed inhibitor and reaction intermediate.…”

“…Due to the scales formation the heat exchange becomes more difficult, that disturbs the normal function of industrial installation [15-18 and 18-22]. In this regard, aspects like cost of treatment versus cost of corrosion damages as well as process safety and the impact of corrosion and corrosion treatment on the environment have to be taken into account [22][23][24][25][26]. It is well known that, excessive corrosion does not only lead to serious damage of installations, it also causes considerable environmental pollution [26][27][28][29][30][31].…”

“…New investigations have shown that adsorption could also occur through hydrogen bonding [121][122][123]. Most of these studies made use of sensitive surface analysis tools such as X-ray photoelectron spectroscopy (XPS) to resolve the nature of inhibitor adsorption [123][124][125]. Some earlier works has however been carried out under conditions that are not representative of on actual application.…”

Electrochemical impedance spectroscopy and in situ UV‐vis spectroelectrochemistry studies of Poly(N‐vinyl carbazole)/ Polydimethylsiloxane composite electrodes

“…The electrochemical properties of CNT/conducting polymer films deposited by electrochemical polymerization from a solution containing both functionalized carbon nanotubes and a monomer were investigated by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) 25. In recent years, various organic electronic devices, including light‐emitting diodes, photovoltaic cells, sensors and memories have been demonstrated by using polymeric materials and their composites with carbon nanotubes.…”