Organic Compound 5-(4-methoxybenzyl)-N-phenyl-1,3,4-thiadiazol-2-amine and NiS filler used to Mitigation the Corrosion of Mild steel and in Marine Atmosphere

Abstract

The concentration of chloride ions is higher in marine atmosphere. The bulk amount of mild steel uses in sea weather for different works. This metal is very sensitive in chloride ions. It produces hostile environment for mild steel. Chloride ions develop corrosion cell on the surface of mild steel and it changes their external and internal morphology as well as physical, chemical and mechanical properties. Mild steel exhibits corrosion reaction to produce galvanic, pitting, stress, crevice, interganular and other forms corrosion. The protection of these types of corrosion 5-(4-methoxybenzyl)-N-phenyl-1,3,4-thiadiazol-2-amine and NiS filler used in chloride ions medium. The corrosion rate of mild steel in chloride ions atmosphere absence and presence 5-(4-methoxybenzyl)-N-phenyl-1,3,4-thiadiazol-2-amine and NiS filler was calculated by weight loss experiment. The corrosion potential and corrosion current density were determined by potentiostat. The coating worked was completed by nozzle spray and chemical vapour deposition. The chemical bonding formation was confirmed by thermal parameters like activation energy, heat of adsorption, free energy, enthalpy and entropy. The values of these thermal parameters were determined by Arrhenius equation and Langmuir isotherms. Both organic and inorganic compounds were formed composite barrier on the surface of base metal. The results of surface coverage area and coating efficiency were shown that these compounds were highly effective in chloride ions atmosphere.

Keywords: Chloride ions environment, Mild steel, chemical bonding, thermal parameter, corrosion, organic coating, filler.