Open AccessComparison between UNS S32101 and UNS S32205 hydrogenated
Author(s) -
Angela Maria Cordeiro de Oliveira,
Ramón Sigifredo Cortés Paredes,
Walmor Cardoso Godoi,
Sérgio Luiz Henke
Publication year - 2021
Publication title -
international journal of scientific research and management
Language(s) - English
Resource type - Journals
ISSN - 2321-3418
DOI - 10.18535/ijsrm/v9i1.ec02
Subject(s) - materials science , hydrogen embrittlement , metallurgy , austenite , hydrogen , cathodic protection , scanning electron microscope , molybdenum , duplex (building) , corrosion , martensite , nickel , pitting corrosion , microstructure , electrochemistry , composite material , chemistry , electrode , dna , biochemistry , organic chemistry
This work presents a study on the duplex stainless steels UNS S32101 and UNS S32205 when subjected to cathodic hydrogenation, to ascertain their behavior under the action of hydrogen. It was evaluated for embrittlement and phase transformations induced by hydrogen, in order to check whether nickel and molybdenum contents would improve resistance to the harmful effects of hydrogen. With the aid of optical (MO) and scanning electron microscopy (SEM), both hydrogen embrittlement in both steels after hydrogenation and degassing was evidenced, as well as pitting corrosion on UNS S32101 duplex stainless steel. It appears that hydrogen can induce the transformation of the austenitic phase (g) into the martensitic phase (α') in the two duplex stainless steels analyzed and it is verified that hydrogen can lead to the formation of sigma phase at room temperature in duplex stainless steel UNS type S32101