The influence of an eco-friendly antibiotic as anti-scalant and inhibitor for steel in gypsum solution and brine water
TL;DR: In this article, the influence of sulfamerizine (SMZ) drug as anti-scalant in water containing 0.7 M CaSO4 and brine water was studied by weight loss, potentiodynamic polarization and A.C impedance measurements.
Abstract: The influence of sulfamerizine (SMZ) drug as anti-scalant in water containing 0.7 M Gypsum salt (CaSO4) and brine water (0.7 M) has been studied by weight loss, potentiodynamic polarization and A.C impedance measurements. The formation of protective layer of SMZ was justified by chronoamperometry technique. Quantum chemical methods confirmed the absorption of anti-scalant on steel. SEM photographs evidenced the formation of stable anti-scalant film on steel in presence of gypsum salt water and brine water.
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TL;DR: In this paper, the authors evaluated the corrosion and scaling potential in water distribution networks of four villages located in different geographical locations of Urmia, Iran, using 36 samples of water entering the villages of Dizaj-e Siavosh, Dolama, Gogtapeh, and Band distribution networks were analyzed according to standard methods for water and wastewater examinations.
Abstract: Water quality entering the drinking water distribution network often provides requirements for corrosion and scaling in rural areas due to the lack of suitable treatment methods. It leads to pipe clogging, reducing longevity of the equipment, and health problems caused by dissolved compounds in the water. The present study aims to evaluate the corrosion and scaling potential in water distribution networks of four villages located in different geographical locations of Urmia, Iran. In this descriptive cross-sectional study, 36 samples of water entering the villages of Dizaj-e Siavosh, Dolama, Gogtapeh, and Band distribution networks were analyzed according to standard methods for water and wastewater examinations. The corrosion and scaling potential were evaluated based on Ryznar stability (RSI), Langelier saturation (LSI), Puckorius scaling (PSI), and Larson–Skold (LRI) indices after determination of pH, total dissolved solids, sulfate, alkalinity, calcium hardness, and chloride. The results indic...
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25 Sep 2002-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the authors used a new all-organic multi-component inhibitor blend composed of citric acid/phosphonates (hydroxy ethylidene diphosphonic acid, HEDP)/acrylate copolymer/isothiazolone.
Abstract: The use of heavy metal-based corrosion inhibitors is increasingly being curtailed by recent environmental restrictions. In many parts of the world, high levels of inorganic phosphates are also restricted by law. In response to these environmental guidelines, this paper presents the results of a ‘green’ chemicals study that was undertaken to investigate the ability of a new inhibitor to inhibit the corrosion, scale and microorganism problems found in open recirculating cooling systems. This study used a new all-organic multi-component inhibitor blend composed of citric acid/phosphonates (hydroxy ethylidene diphosphonic acid, HEDP)/acrylate copolymer/isothiazolone. The effects of the inhibitor on carbon steel dissolution in synthetic cooling water were studied through weight loss measurements and electrochemical, scale, and microorganism tests. The results obtained from this study show that the new inhibitor can decrease corrosion, scale build-up and microbial growth under the conditions tested. Potentiodynamic polarization curves indicate that the blended inhibitor acted as an anodic inhibitor, reducing metal dissolution. The nature of protective films formed on the carbon steel was studied by scanning electron microscopy (SEM) and auger electron spectroscopy (AES). The inhibition effects are due to the formation of protective films which might contain calcium phosphonates and iron oxide. The inhibitor used in this study appears to have an excellent crystal modification effect on calcium carbonate scale. The various microorganisms used in this study were inhibited effectively in the planktonic state.
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129 citations
TL;DR: The performance of torsemide and furosemide drugs as corrosion inhibitors for mild steel in 1 N HCl was thoroughly investigated by weight loss and electrochemical methods.
Abstract: The performance of torsemide and furosemide drugs as corrosion inhibitors for mild steel in 1 N HCl was thoroughly investigated by weight loss and electrochemical methods. The inhibition efficiencies of drugs obtained by all methods were in good agreement with each other. Torsemide exhibited higher inhibition efficiencies than furosemide in all the experimental studies. Polarization studies revealed that the inhibiting action of the compounds is under mixed control. The free energy of adsorption and the influence of temperature on the adsorption of inhibitors onto a mild steel surface have been reported. The adsorption of the compounds was found to obey the Langmuir adsorption isotherm. The mechanism of inhibition and formation of the Fe–inhibitor complex were confirmed by FT-IR and UV–visible absorption spectral analysis. The scanning electron microscopy (SEM) and atomic force microscopy (AFM) results established the formation of a protective layer on the mild steel surface. Quantum chemical calculations...
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TL;DR: In this article, the electronic parameters of tacrine were evaluated by quantum chemical method to assess its corrosion inhibition potential and it was confirmed by chemical and electrochemical studies on steel in 1.0 m HCl and 0.5 m H 2 SO 4.
43 citations