Protection of Copper and its Alloys Using Corrosion Inhibitor-Literature Review

Abstract

A review of the literature dealing with the electrochemical corrosion of copper and its alloys with purpose to find the most suitable inhibitor for its protection has been done. According to their chemical composition of corrosion inhibitors are divided into inorganic and organic inhibitors. Inhibition of alloying metals are possible (such as the addition of arsenic alloy components in brass, preventing its unzincanization). The paper reviews the theoretical basis of application of inhibitors to protect metals from corrosion as well as an overview of current research application of inhibitors to protect copper and copper alloys. Benzotriazole (BTA) is most often used corrosion inhibitor for copper and its alloys in acidic and alkaline solution, because of its high inhibition efficiency. The lowest concentration of inhibitor for protection of copper in various solutions was 0.05%, and for the protection of copper in contact with steel is 0.1%. On the surface of copper and brass BTA forms a protective Cu-BTA film. However, BTA is like many other synthesized organic inhibitors is very toxic and if used in very small concentrations. It turned out that the AETD, AETDA and PTAT good corrosion inhibitors of copper mixed type with the efficiency of inhibition increases with concentration. Due to the adverse effects on the environment, health and other bodies in recent times the focus of research is transferred to the inhibiting action of biological molecules or mixtures of natural compounds called "Green inhibitors".

Photogalvanics of copper and brass working electrodes in the NaOH-Allura Red-d-galactose-DDAC electrolyte for solar power generation

“…51 The compounds 2-amino-5-ethylthio-1,3,4-thiadiazole, 2amino-5-ethyl-1,3,4-thiadiazole and 5-(phenyl)-4H-1,2,4triazole-3-thiol are also good corrosion inhibitors, but due to their adverse effects on the environment, health and organisms in recent times, the focus of research is transferred to the inhibiting action of biological molecules or mixtures of natural compounds called "green inhibitors". 52 Graphene-based materials may also be used as photoanodes in future research. 53 The present work used graphite as counter electrode.…”

Advancement of corrosion inhibitor system through N-heterocyclic compounds: a review

“…Most commonly the corrosion inhibitors are observed to be film-forming and they interact with metals via physical forces, electron donation, etc. [38,39]. Physisorption takes place at a fast rate but the inhibitor gets desorbed as the rise in temperature takes place.…”

Computational Stimulation and Experimental Study on Corrosion Inhibition Qualities of <i>Emilia sonchifolia</i> Leaf Extract for Copper (CU131729) in Hydrochloric Acid

“…Corrosion process forms corrosion product and deposits on corroding copper surface which interferes with its electrical, thermal and mechanical qualities and also leads to huge economic loss and possible safety concerns [9] [10] [11]. The use of corrosion inhibitors in such situation is proven essential to augment the compactness of the surface passive layer formed on material surface and/or mitigate corrosion processes [12] [13] [14] [15]. The utilization of appropriate inhibitor is necessary taking into cognizance the corrosion mechanism of copper in chloride ion environments.…”