Abstract
The effect of the SCPs-[CuII(en)2] [CuI (CN)2]2. H2O] (SCP1) and {[H2DAB] [Cu4(CN)6].2H2O} (SCP2) as corrosion inhibitors for carbon steel (CS) was studied in 1.0M HCl solution. As the synthesized inhibitor dose increases, the inhibition productivity (%e) increases reaching to 90.3% and 89.9% at 21x10-6M dose for SCP2 and SCP1, respectively. This result evidenced by mass loss (ML) investigated at three different temperatures 25-35-45oC, while potentiodynamic polarization (PP), electrochemical impedance spectroscopy (EIS), and electrochemical frequency modulation technique (EFM) were tested at 25°C. The synthesized inhibitors adsorbed on the CS surface physically allowing Henry isotherm. The results displayed that the synthesized inhibitors are excellent and their (%e) was significantly increased by raising the dose and decreased by raising the temperature. Polarization curves revealed that the synthesized inhibitors act as mixed type. The thermodynamic parameters were calculated and discussed. The protection was confirmed by the creation of the thin film of inhibitors precipitated on the surface of CS.
Highlights
Man has identified steel manufacturing as costeffective and vital as it is caused by one of the most industrial resistant issues [1]
All attempts to produce crystals containing the organotin adduct have resulted in SCP1
The results showed that by increasing the doses from 1x10-6M to 21 x10-6M, the inhibition efficincy increases in contrast to the corrosion rate (C.R), which lowered with increasing doses of inhibitors
Summary
Man has identified steel manufacturing as costeffective and vital as it is caused by one of the most industrial resistant issues [1]. In the presence of aggressive media such as HCl, carbon steel is damaged, and corrosion of the metal begins [2]. Many acidic solutions, such as HCl, H2SO4, and HNO3, are widely employed in a variety of procedures, including metal pickling, boiler cleaning, oil well acidification, and ion exchanger recovery. HCl is one of the acids that is commonly used to increase the productivity (stimulation) of wells in the oil and gas industry [3,4,5,6].
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