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Effect of caffeine-Zn2+ system in preventing corrosion of carbon steel in well water
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نویسنده
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rajam k. ,rajendran s. ,banu n.n.
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منبع
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journal of chemistry - 2013 - دوره : 2013 - شماره : 0
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چکیده
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The inhibition efficiency (ie) of caffeine in controlling corrosion of carbon steel in well water in the absence and presence of zn2+ has been evaluated by mass loss method. the formulation,consisting of 200 ppm of caffeine and 50 ppm zn2+,offers 82% inhibition efficiency to carbon steel immersed in well water. addition of malic acid increases inhibition efficiency of the caffeine-zn2+ system. the inhibition efficiency of caffeine-zn2+ and caffeine-zn2+-malic acid system decreases with the increase in immersion period and increases with the increase in ph from 3 to 11. ac impedance spectra,sem micrographs,and afm studies reveal the formation of protective film on the metal surface. the film is found to be uv fluorescent. © 2013 k. rajam et al.
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آدرس
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department of chemistry,k. l. n. college of information technology, India, pg and research department of chemistry,gtn arts college, India, department of chemistry,rvs school of engineering and technology, India
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Authors
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