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Electrochemical corrosion behaviour of zirconia particle‐reinforced high alloyed steel
Author(s) -
Mandel M.,
Krüger L.,
Decker S.
Publication year - 2015
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.201508249
Subject(s) - materials science , corrosion , particle (ecology) , metallurgy , electrochemistry , chloride , cubic zirconia , electrolyte , particle size , chromium , pitting corrosion , chemical engineering , chemistry , electrode , ceramic , oceanography , engineering , geology
The electrochemical corrosion behaviour of a particle‐reinforced high‐alloyed CrMnNi‐steel with varying particle content of 0 vol.‐%, 5 vol.‐% and 10 vol.‐% was investigated by potentiodynamic polarisation in 5 wt.‐% sodium chloride solution. Electron microscopy and white light interferometry revealed pitting corrosion for the materials without (0 vol.‐%) and with a particle content of 5 vol.‐%, whereas the composite containing 10 vol.‐% particle content exhibited an intensified particle detachment and homogeneous corrosion attack on the surface. Furthermore, after the polarisation the electrolyte was analysed for containing dissolved iron and main alloying elements of chromium, nickel and manganese by ICP‐MS method. It was found that when the particle content increases a pronounced drastic enhancement of dissolved iron and main alloying elements occurs which directly correlates to the corrosion mechanisms found by optical investigations.