anti-corrosive properties of ceo2 conversion coatings on aluminum alloy 2024 prepared by dip immersion method

نویسندگان

niloufar bahramipanah

assistant professor, department of chemistry, payame noor university, tehran, iran iman danaee

assistant professor, department of chemistry, payame noor university, tehran, iran mehrdad kanani

m.s. student, department of petroleum engineering, petroleum university of technology, abadan, iran mohammad hosein maddahy

m.s instructor, department of petroleum engineering, petroleum university of technology, abadan, iran

چکیده

as an alternative to chromate conversion coatings, rare-earth coatings especially cerium, because of the low toxicity, have attracted considerable attention. using dip immersion method, cerium-based conversion coating was deposited on aluminum 2024. corrosion resistance was studied in 3.5 wt.% nacl solution using potentiodynamic polarization, electrochemical impedance spectroscopy, and surface methods. the coated samples revealed a considerable decrease in corrosion rate and with increasing immersion time up to 1200 s, the coating resistance increased. electrochemical impedance data showed that the aluminum charge transfer resistance was increased in the existence of cerium oxide conversion coatings. using energy dispersive spectroscopy (eds) and scanning electron microscopy (sem), the chemical composition and surface morphology were also evaluated.

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Anti-corrosive Properties of CeO2 Conversion Coatings on Aluminum Alloy 2024 Prepared by Dip Immersion Method

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عنوان ژورنال:
iranian journal of oil and gas science and technology

جلد ۵، شماره ۴، صفحات ۶۸-۷۶

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