Benzimidazole Derivatives as Copper Alloy Corrosion Inhibitors

Seawater is a corrosive medium that adversely affects on the metallic structures. For that reason, it is often desirable to use some type of corrosion protection to extend the life of structures. The aim of this work was to examine the possibility of CuNi alloy protection in artificial seawater by four benzimidazole derivatives: 2-amino-5(6)nitrobenzimidazole, 2-amino-5-(6)-cyanobenzimidazole, 2-aminobenzimidazole, 2-amino-5(6)-(2-imidazolinyl)benzimidazole hydrochloride. The corrosion studies conducted by polarization measurements after 1 h of immersion in inhibitor solution showed that the most effective inhibitor is 2-amino-5(6)-nitrobenzimidazole. The electrochemical tests were also performed in time by the means of electrochemical impedance spectroscopy for the two most effective inhibitors. The surface of samples was analyzed by scanning electron microscopy and ATR-FTIR spectroscopy. It was concluded that the efficiency of studied inhibitors increases with prolonged exposure of the CuNi alloy to inhibitor solutions as well as with the increase of inhibitor concentration. This work is licensed under a Creative Commons Attribution 4.0 International License

Scientific Research Activities of the Department of Organic Chemistry in the Period 2009–2019

Od osnutka Zavoda za organsku kemiju Fakulteta kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, koji je 1922. god. osnovao prof. dr. Ivan Marek, te kasnije preko djelovanja nobelovca Vladimira Preloga i brojnih uspješnih generacija organskih kemičara, vidljiv je utjecaj ne samo na znanstvenu djelatnost Zavoda nego i na cjelokupnu hrvatsku kemijsku zajednicu, osobito u području organske sintetske i medicinske kemije. Preparativnu organsku kemiju profesor Prelog držao je nužnom odrednicom studija, koja je zahvaljujući njegovu djelovanju u Zavodu (1935. – 1941.) ostala glavna okosnica znanstveno-istraživačkog rada. Od samog osnivanja u laboratorijima Zavoda odvijaju se istraživanja iz područja sintetske organske i medicinske kemije i fotokemije, stječu se znanstveni stupnjevi i obrazuju brojni organski kemičari, među kojima su danas mnogi priznati znanstvenici u Hrvatskoj i svijetu. Ovo djelo je dano na korištenje pod licencom Creative Commons Imenovanje 4.0 međunarodna.Since its establishment in 1922 by Professor Ivan Marek and through the work of Nobel Prize winner Vladimir Prelog, the Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, showed strong impact, not only on scientific activities of the Department, but on the entire Croatian scientific community, especially in the domain of organic synthetic and medicinal chemistry. Preparative organic chemistry, thanks to the work of Professor Prelog (1935–1941), has remained the main scientific research activity in the Department. Since the formation of the Department of Organic Chemistry, research work in the field of synthetic organic and medicinal chemistry, as well as photochemistry, is carried out in its laboratories, scientific degrees are achieved and numerous organic chemists have been educated, many of whom are now recognised scientists in Croatia and worldwide. This work is licensed under a Creative Commons Attribution 4.0 International License