Enhancement of corrosion resistance of the cooling systems in desalination plants by green inhibitor

Abstract

Taraxacum officinale extract (toe) has been tested for preventing the corrosion of cooling systems in desalination plants. The inhibition of corrosion effects has been characterized by chemical and electrochemical methods (Mass loss, potentiodynamic polarization and electrochemical impedance spectroscopy) and surface observations. tests on cooling systems were carried out in seawater environment. the presence of toe in the re-circulation loop decreases the corrosion of carbon steel by adsorption of toe compounds on the surface of metal pipes. the optimum toe concentration was reached at 400 mg L −1 and the inhibition efficiency was higher than 94%. TOE allowed increasing the energy barrier of the corrosion process. SEM, FT-IR and UV spectra observations confirmed that TOE prevents corrosion attacks at the surface of the pipes. HPLC analyses identified the presence of saccharides, organic acids, phenol antioxidant and caffeic acid derivatives in TOE, which may be the active promoters of corrosion inhibition. www.nature.com/scientificreports www.nature.com/scientificreports/ R ct cto ct where R ct and R cto are the charge transfer resistances in the presence and absence of TOE, respectively. Compound Concentration (mg L −1 )

Corrosion inhibition and thermodynamic studies on carbon steel in well water by ethanolic extract of Alpinia officinarum leaves (Lesser galangal)-Zn2+

“…The maximum IE of 93% is recorded from a 500ppm of AO and 30ppm of Zn 2+ system in one day immersion period at 303K. The percentage of IE is reduced for AO leaves extract, when contact period is increased from 1 to 7 (days) (44) . The effect of immersion period on an ethanolic extract of AO leaves proved that protective layer formed on the CS surface deteriorates and dissolves in solution by the corrosion media and accelerates the corrosion process (42,(45)(46)(47)(48) .…”

Synthesis, Characterization, Theoretical and Electrochemical Studies of Pyrazoline Derivatives

“…The adsorption mechanism of these compounds on the copper surface in 3% NaCl media is described in Figure 8. The first stage of adsorption of molecules on the copper surface involves replacing water molecules primarily adsorbed on the surface, as shown in reaction (6) 48 . In the present case, the high electron density localized on nitrogen atoms and the benzene ring linked, as described in the theoretical parts.…”

Corrosion mitigation in desalination plants by ammonium-based ionic liquid

“…The main task of desalination plants is to remove salts from marine water to produce drinking water 3 . During the desalination processes, the saline water pass though various tubes and units contain different metal and alloys 4 . The CuNi (90:10) alloy is the best alloy for constructing condensers and heat exchangers in desalination plants 5 , 6 .…”