Open AccessProtection of copper corrosion in acidic medium using pinostrobin
Author(s) -
Rosita Wati,
Saprizal Hadisaputra,
Dina Asnawati,
Dhony Hermanto
Publication year - 2018
Publication title -
acta chimica asiana
Language(s) - English
Resource type - Journals
eISSN - 2550-0503
pISSN - 2550-049X
DOI - 10.29303/aca.v1i2.26
Subject(s) - physisorption , endothermic process , copper , chemistry , freundlich equation , adsorption , corrosion , nuclear chemistry , inorganic chemistry , organic chemistry
The corrosion inhibition efficiency of copper was tested by the weight loss method in 1 M H2SO4 medium in the presence of pinostrobin as inhibitor. It shows that the addition of pinostrobin inhibitor reduce the corrosion rate. The nature of thermodynamic of pinostrobin adsorption on copper surfaces follows the Freundlich isotherm. The process of inhibition is endothermic, spontaneous and physisorption. It is proved by the Ea, ΔH and ΔS and ΔG values in which the thermodynamic studies show that the values of Ea < 80 kJ.mol-1, ∆H positive, ∆S positive, and ΔG < -20 kJ.mol-1.