The effect of copper addition on the corrosion resistance of cast duplex stainless steel

In this study, the effects of the addition of 3.01% Cu on the corrosion behaviour of cast duplex stainless steel aged for 1h at different temperatures between 450 and 600°C was investigated by electrochemical tests in 0.6M NaCl, 0.3M H2SO4 and 0.6M NaCl+0.3M H2SO4. A short ageing time increases the...

Full description

Saved in:
Bibliographic Details
Published inJournal of materials research and technology Vol. 8; no. 2; pp. 2107 - 2119
Main Authors Lima, Hillane Mirelle Lopes Ferreira de, Tavares, Sérgio Souto Maior, Martins, Marcelo, Araújo, Walney Silva
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.04.2019
Elsevier
Subjects
Cast duplex stainless steel
Copper
Passive film
Pitting corrosion
Pitting corrosion
Passive film
Copper
Cast duplex stainless steel
Online AccessGet full text

Cover

More Information
Summary:In this study, the effects of the addition of 3.01% Cu on the corrosion behaviour of cast duplex stainless steel aged for 1h at different temperatures between 450 and 600°C was investigated by electrochemical tests in 0.6M NaCl, 0.3M H2SO4 and 0.6M NaCl+0.3M H2SO4. A short ageing time increases the hardness and mechanical resistance of the Cu-containing steel by precipitation hardening. Potentiodynamic polarization and electrochemical impedance spectroscopy results show that the effect of Cu addition depends on the media studied. In addition, critical pitting temperature (CPT) measurements revealed that steel with 3.01% Cu has a lower pitting corrosion resistance. On the other hand, for both steels, the short time ageing caused a slight increase in CPT values.
ISSN:2238-7854
DOI:10.1016/j.jmrt.2019.01.018