Anti-corrosive Properties of CeO2 Conversion Coatings on Aluminum Alloy 2024 Prepared by Dip Immersion Method
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJOGST-5-4_006
تاریخ نمایه سازی: 18 اسفند 1397
Abstract:
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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Authors
Niloufar Bahramipanah
Assistant Professor, Department of Chemistry, Payame Noor University, P.O.BOX ۱۹۳۹۵-۳۶۹۷, Tehran, Iran
Iman Danaee
Associate Professor, Department of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran
Maryam Kanani
M.S. Student, Department of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran
Mohammad Hosein Maddahy
M.S. Student, Department of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran