Original scientific paper
https://doi.org/10.15255/CABEQ.2018.1572
Corrosion Protection by Octadecylphosphonic Acid in Flow Conditions
E. Kristan Mioč
; Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, 10000 Zagreb, Croatia
H. Otmačić Ćurković
orcid.org/0000-0002-9794-1274
; Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, 10000 Zagreb, Croatia
Abstract
The aim of this work was to examine the influence of the flow rate of corrosive media on the stability of self-assembled films of octadecylphosphonic acid on copper-nickel alloy and stainless steel. The studies were conducted in river and seawater in a laboratory scale flow system. Corrosion behaviour of protected and unprotected alloys was examined by electrochemical techniques, electrochemical impedance spectroscopy, and polarization measurements. The results show that octadecylphosphonic acid films can efficiently protect copper-nickel and stainless steel from corrosion in flowing natural
waters. The flow of corrosive media had the highest influence on the stability of films on CuNi in seawater, while in all other studied cases, the protective properties of ODPA film changed insignificantly with the change of the flow rate.
Keywords
corrosion protection; electrochemical measurements; river water; seawater; flow condition
Hrčak ID:
225902
URI
Publication date:
7.10.2019.
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