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Nano‐sized zeolite particles as inhibitor carrier in plasma electrolytic oxide layers on AZ31
Author(s) -
Schneider Michael,
Kremmer Kerstin,
Tabatabai Dominik,
Fürbeth Wolfram
Publication year - 2018
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201709969
Subject(s) - anodizing , corrosion , plasma electrolytic oxidation , materials science , corrosion inhibitor , electrolyte , oxide , pitting corrosion , nano , metallurgy , cerium oxide , cerium , chemical engineering , composite material , chemistry , electrode , aluminium , engineering
Plasma electrolytic layers on AZ31 provide an efficient corrosion protection. However, the process‐related pores and holes are weak points in view of risk of corrosion. The incorporation of a small amount of nano‐sized inhibitor‐loaded zeolite particles leads to a significant improvement of the corrosion resistance. The study shows that the inhibitor‐loaded particles can be incorporated directly during plasmaelectrolytic oxidation in a one‐step‐process. The risk of pitting corrosion decreases in comparison with inhibitor free anodized layers and the cerium inhibitor was found to deposit directly inside pits.