الفهرس 
Corrosion and Its Adverse EffectOnly 14 pages are availabe for public view
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Abstract
In this work, six surfactants called 1-ethyl-4H-benzo[d][1,3]thiazin-1-ium; bromide (BTB), N-ethyl-N,N-dioctyloctan-1-aminium; bromide (DAB), 1-Dodecyl-4H-benzo[d][1,3]thiazin-1-ium; bromide (DTB), 1-Hexyl-4H-benzo[d][1,3]thiazin-1-ium; bromide (HTB), Triethyl-hexyl-ammonium; bromide (THAB) and Dodecyl-triethyl-ammonium; bromide (DTAB). The chemical structures of the prepared cationic surfactants were confirmed using FTIR spectroscopy and 1HNMR Spectroscopy. The surface active properties of the synthesized compounds were determined based on the surface tension measurements at 25°C. The determined surface indices show that the prepared compounds have high surface activity in their aqueous solutions. The synthesized compounds were evaluated as corrosion inhibitors for X-65 tubing steel in the deep oil wells formation water saturated with carbon dioxide gas by various electrochemical techniques i.e. open circuit potential measurement, electrochemical impedance measurements (EIS) and potentiodynamic polarization measurements. Also, the experimental results were matched with quantum chemical calculations. The surface morphology of X-65 steel specimen in the corrosive solution in the presence and absence of inhibitor (I) as a representative one was determined by scanning electron microscopy (SEM) and Energy dispersive analysis of X-rays (EDX) techniques. The results obtained showed that, the addition of the prepared inhibitors decreases the corrosion rate to low extent and the corrosion inhibition efficiency increases with increase the dose of inhibitor, and also with shorter spacer length in their structure. In addition, the calculated values for the adsorption of the prepared inhibitors indicate that the adsorption process is of mixed physical and chemical nature.