Abstract
The corrosion performance of Fe–40Ni–20B (at%) amorphous ribbons in 7N NaOH and 3.5% NaCl, at 25 °C, is investigated by potentiodynamic polarization, chronoamperometry and Raman spectroscopy. Immersion in 7N NaOH induces a multiple stage passivation/pseudopassivation, which is associated with the successive formation of (Ni,Fe) compounds based on Fe 3O 4, Ni(OH) 2/NiO, FeOOH/Fe 2O 3, Ni(OH) 2·2NiOOH and βNiOOH. Fe 3O 4, NiO, Fe 2O 3 and βNiOOH are responsible for true passivity. Although carbonate ions from the environment have penetrated the passive film, the glass is not susceptible to pitting in 7N NaOH. Despite amorphicity, the glass behaviour in 7N NaOH is governed by the behaviour of its crystalline metallic constituents. The alloy exhibits a slight susceptibility to localized corrosion, in 3.5% NaCl.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
