Open AccessCorrosion Behavior of Anodic Self-Ordered Porous Oxide Layers on Stainless Steel
Author(s) -
Lucia Helena Prado,
Evangelia Anastasiou,
Sannakaisa Virtanen
Publication year - 2021
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/abe1de
Subject(s) - anodizing , materials science , oxide , corrosion , electrolyte , dielectric spectroscopy , polarization (electrochemistry) , intergranular corrosion , metal , electrochemistry , metallurgy , substrate (aquarium) , open circuit voltage , anode , porosity , chemical engineering , composite material , electrode , aluminium , chemistry , voltage , oceanography , physics , quantum mechanics , engineering , geology
In the present study we performed anodization of stainless steel AISI 316L varying the voltage, time and H 2 O concentration in the electrolyte obtaining self-ordered porous oxides. Open-circuit potential measurements, potentiodynamic polarization and electrochemical impedance spectroscopy were performed in 0.1 M H 2 SO 4 , 0.1 M NaCl and 0.1 M NaOH electrolytes. The metallic substrate underneath the grown oxide was also characterized. The results indicate that the corrosion behavior of the metallic substrate is not impaired by the anodization treatments. However, “crevice-induced intergranular corrosion” between the oxide and the metallic substrate was revealed after electrochemical measurements in the acidic electrolyte.