Study the effect of Ni-P coating and 4, 5-dimethyl- 1, 2-dithiol-3-thione inhibitor on the corrosion of carbon steel
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Date
2020-02-12
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International Journal of Sciences and Research
Abstract
The carbon steel is widely used in the petroleum industry because of its excellent mechanical
properties, but it is exposed to different environments, Such as hydrochloric acid who are
commonly used for pickling and also for the removal of rust and scales in petroleum
industries. In this work, we have studied the protection against corrosion of carbon steel by
applying the Ni-P alloy coating deposited on a steel substrate compared to another method of
protection by adding the 4,5-dimethyl- 1,2-dithiol-3-thione inhibitor in an aggressive medium
(1M HCL) using potentiodynamic polarization and electrochemical impedance spectroscopy
(EIS) methods. The results obtained are shown that This organic compound inhibits the acidic
corrosion even at low concentration, is good inhibitors and are in good agreement. The
efficiency of the inhibition Is increase with the increase of inhibitor concentration to reach the
optimal values of 8×10-5 mM and the best coating of nickel-phosphorus at current density
5 A dm-2. The obtained results showed that the Ni-P alloy coating Decreases the corrosion
rate of carbon steel better than the inhibitor 4, 5-dimethyl- 1, 2-dithiol-3-thione.
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Citation
2. LEKMINE Farid, Ben Temam Hachemi, Hadjadj Mohammed, “Study the effect of Ni-P coating and 4, 5-dimethyl- 1, 2-dithiol-3-thione inhibitor on the corrosion of carbon steel”. International Journal of Sciences and Research, 76 (2) (2020) 138-152 doi: 10.21506/j.ponte.2020.2.12