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Maruthamuthu S.,CSIR - Central Electrochemical Research Institute | Ramachandran S.,CSIR - Central Electrochemical Research Institute | Kumar B.D.,CSIR - Central Electrochemical Research Institute | Shatish V.,Indira Gandhi Center for Atomic Research | And 6 more authors.
Journal of ASTM International | Year: 2011

Aviation turbine fuel is a mixture of various hydrocarbons and additives. Some fuel-soluble chemicals are added in small amounts to enhance or to maintain the properties related to fuel performance. In the present study, the influence of microbes on corrosion in aviation turbine fuel transporting pipeline is reported. Chemical and biological analyses of the corrosion product collected from aviation turbine fuel pipeline were carried out. While examining the topography of the pipeline, the possibilities of some water stagnant points were noticed. The reason for the corrosion in the aviation turbine fuel transporting pipeline is investigated and discussed. © 2011 by ASTM International. Source


Maruthamuthu S.,CSIR - Central Electrochemical Research Institute | Kumar B.D.,CSIR - Central Electrochemical Research Institute | Ramachandran S.,CSIR - Central Electrochemical Research Institute | Anandkumar B.,Indira Gandhi Center for Atomic Research | And 4 more authors.
Industrial and Engineering Chemistry Research | Year: 2011

Petroleum product pipelines in India contain large numbers of various types of microorganisms that either directly or indirectly enhance corrosion. Field studies have been carried out by CSIR-CECRI to investigate the corrosion problem in petroleum product transporting pipelines in South India. Although Unicor J inhibitor was added in the pipeline to control corrosion, corrosion products were detected in the pipeline. The present study reveals that the degradation of the inhibitor enhances the proliferation of bacteria, which enhances the corrosion. The selection of an inhibitor to control corrosion has also been done. © 2011 American Chemical Society. Source


Kalaiselvi P.,Offshore Platform and Marine Electrochemistry Center | Chellammal S.,Offshore Platform and Marine Electrochemistry Center | Palanichamy S.,Offshore Platform and Marine Electrochemistry Center | Subramanian G.,Offshore Platform and Marine Electrochemistry Center
Materials Chemistry and Physics | Year: 2010

Methanolic extract of Artemisia pallens was tested as corrosion inhibitor for mild steel in 4N HCl and conc. HCl. Weight loss and polarization techniques were used for evaluating corrosion inhibition in 4N HCl, whilst weight loss, SEM and FT-IR studies were carried out in conc. HCl. The inhibition efficiency was found to increase with increase of the inhibitor concentrations due to the adsorption of the inhibitor molecules on the metal surface and the adsorption follows Langmuir's adsorption isotherm. The inhibition efficiency was found to be 93% at 1.5 g l -1 in 4N HCl and 96.5% at 40 g l -1 in conc. HCl. © 2009 Elsevier B.V. All rights reserved. Source


Chellammal S.,Offshore Platform and Marine Electrochemistry Center | Kalaiselvi P.,Offshore Platform and Marine Electrochemistry Center | Ganapathy P.,Offshore Platform and Marine Electrochemistry Center | Subramanian G.,Offshore Platform and Marine Electrochemistry Center
Arabian Journal of Chemistry | Year: 2012

Phthalic anhydride is a toxic and non-biodegradable organic compound and is widely used for the production of dyes. This paper has investigated the electrochemical oxidation of phthalic anhydride in an undivided cell at different experimental parameters such as pH, current density and supporting electrolytes on the anode of titanium substrate coated with mixed metal oxides of RuO 2, IrO 2, SnO 2 and TiO 2 prepared by thermal decomposition method. The surface morphology and the structure of the above anode were characterized by scanning electron microscopy, electron dispersion microscopy and X-ray diffraction. The study shows that the electrode exhibits good electro catalytic activity together with chemical stability during the treatment of the phthalic anhydride. At pH 3, the maximum removal of COD of 88% with energy consumption of 30.5 kW h kg -1 was achieved by the addition of 10 g l -1 NaCl in 0.2 mol dm -3 Na 2SO 4 at 5 Adm -2. This electrolytic investigation offers an attractive alternative method for the destruction of industrial effluents contaminated with phthalic anhydride. © 2012. Source


Chellammal S.,Offshore Platform and Marine Electrochemistry Center | Raghu S.,Offshore Platform and Marine Electrochemistry Center | Kalaiselvi P.,Offshore Platform and Marine Electrochemistry Center | Subramanian G.,Offshore Platform and Marine Electrochemistry Center
Journal of Hazardous Materials | Year: 2010

In this study, the electrochemical treatment has been investigated in the real acidic effluent of copper-phthalocyanine dye manufacturing plant. Galvanostatic batch electrolyses have been carried out in an undivided cell using stainless steel as cathode, dimensionally stable anode (DSA) and graphite as anodes at different current densities and temperatures. The influence of these variables on current efficiency, cell voltage, energy consumption and deposit quality was reported. Under optimized conditions, the maximum copper recovery of 98% and COD removal efficiency of 87.3% with the energy consumption of about 11.23. kWh/kg of Cu and 6.08. kWh/kg of COD, respectively at 30°C were achieved in the acidic raw effluent using 2D parallel-plate cathode. While in 3D stainless steel turning cathode reactor, 99.5% of copper can efficiently be recovered from dilute solution with an acceptable current efficiency of about 56.8% with minimum energy consumption of 2.37. kWh/kg of Cu. The experimental results suggested that the efficiency of copper removal is hindered by the presence of organic species in the mixed industrial effluent. © 2010 Elsevier B.V. Source

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