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Improving pitting corrosion resistance of aluminum by anodizing process
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نویسنده
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john p. ,khan i.u. ,sheikh s.t. ,gulzar n. ,rehman a.-u.
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منبع
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journal of the chemical society of pakistan - 2013 - دوره : 35 - شماره : 1 - صفحه:72 -76
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چکیده
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Anodizing of aluminum was studied in sulphuric/citric/boric acid electrolyte system to improve pitting corrosion resistance. maximum oxide film thickness was obtained using 5% sulphuric acid,3% citric acid and 0.5% boric acid electrolyte composition. the corrosion resistance of aluminum sample was determined to find the effectiveness of oxide coating by potentiodynamic polarization test. the surface morphology of aluminum samples was investigated using scanning electron microscope (sem) before and after corrosion test. it was found that the coated aluminum sample obtained by anodizing in sulphuric/citric/boric acid electrolyte system exhibited better pitting corrosion resistance with no significant difference in surface morphology.
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کلیدواژه
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Aluminum alloy; Anodizing; Corrosion; Oxide coating
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آدرس
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department of chemistry,gc university, Pakistan, department of chemistry,gc university, Pakistan, minerals and metallurgy research centre,pcsir laboratories, Pakistan, department of chemistry,gc university, Pakistan, department of chemistry,gc university, Pakistan
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Authors
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