Corrosion control of Cu–Ni alloy in hydrochloric acid by amines compounds

Abstract

Inhibitors of corrosion are chemicals materials that, when added in little amount to an environment impede the development of corrosion reactions. The inhibitors use is represent one of selections of protecting alloys of metals from corrosion, which leads to protect surfaces of metal in corrosive environments. Most organic compounds inhibitors that contain nitrogen, are effective inhibitors in the acidic medium, especially hydrochloric acid. Copper represents noble metal and requiring very strong oxidants for its dissolution or corrosion. The electrolytic plating and chemical dissolution are the main processes used in the electronic devices fabrication. Alloys made of copper are widely used in chemical processes especially when heat and electrical conductivity are important factors in these processes, there is very wide range of copper metal using in commercial applications. The corrosion inhibition or corrosion control of alloy made of copper (Cu)nickel (Ni) in hydrochloric acid (6% HCl) at the range of temperature of (40-60°C) was studied in the absence and presence of the inhibitors used in the experimental work were ethylenediamine (EDA) and tetraethylenepentamine (TEPA) at the range of concentration of (1-10 g/l). The technique of weight loss was used to evaluate the data of corrosion rate. EDA & TEPA were used as organic inhibitors of corrosion. Corrosion rate decreased with increases of inhibitor concentration, while it increased with increases of temperature. The adsorption isotherm of both inhibitors on metal surface used in this research was found to follow Freundlich. The kinetic-thermodynamic data and adsorption isotherms were used to evaluate the values of equilibrium constants (K).

Sodium Methoxide Catalyzed Preparation of Nitrogen Compounds from Palm Oil Methyl Esters as Corrosion Inhibitor

“…In previous studies, the use of various nitrogen compounds has been reported, among others are oligomers of 4-vinylpry dine (Ilim et al, 2021b;Ilim et al, 2016e), oligomer of 2vinylpyridine (Ilim et al, 2021d) , oligomer of 4-vinylpiperidine (Ilim et al, 2017c) , and ethylenediamine and tetraethylenepentamine (Mahmmod et al, 2019) . In the context of nitrogen compounds preparation, other potential raw materials are vegetable oils, considering their availability, renewability, biodegradability, and non-toxicity.…”

Experimental studies of mild steel corrosion inhibition in hydrochloric acid using inhibitor type sulfa drugs

“…The profound process playing an active part in industry is corrosion, especially for alloys and metals. There are wide applications for mild or carbon steel in industries and petroleum applications, such as flow lines and down hole tubular [1][2][3][4][5][6][7][8][9]. Inhibitors of corrosion process represent enormous practical emphasis, being comprehensive employed in minimizing metallic waste and the inhibitor use is represent one of the best methods known of corrosion protection process in industrial field and the best way to resist corrosion growth [10][11][12][13][14].…”