Influence of Aging Time at 850°C on Microstructure and Corrosion Resistance of a Cold Rolled 2205 Duplex Stainless Steel

• Autorzy: Assumpção Raphael França , Fortes Monteiro Jessica C. , Campideli Victor Cardoso , Santos Dagoberto , Sicupira Dalila C.

Identyfikatory

DOI

10.24425/amm.2023.142449

• Języki publikacji: EN

Abstrakty

EN

The effect of aging time at 850°C for 300 s, 600 s, 1800 s, and 84600 s on the microstructural evolution and corrosion resistance of 2205 duplex stainless steel (DSS) was studied after cold rolling up to 60% of reduction. X-ray diffraction, scanning electron and transmission electron microscopy were used for microstructural characterization. The corrosion behavior was studied by cyclic potentiodynamic polarization (CPP) and electrochemical impedance technique (EIS) in 3.5% NaCl solution and the susceptibility to sensitization was investigated through the double loop electrochemical potentiodynamic reactivation (DL-EPR) test in 0.5 M H₂SO₄ + 0.1 M NaCl + 0.002 M KSCN solution. After cold working, increasing aging time led to an increase in sigma phase precipitation and a decrease in pitting corrosion resistance. However, the ultrafine microstructure had a beneficial influence on the self-healing effect in Cr and Mo depleted areas with the increasing of aging time, resulting in higher passivation ability. The DSS 2205 type was not susceptible to intergranular corrosion for the aged conditions applied.

Słowa kluczowe

EN

duplex stainless steel; aging; corrosion; secondary phases; self-healing

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2023
• Tom: Vol. 68, iss. 2
• Strony: 681--688
• Opis fizyczny: Bibliogr. 27 poz., rys., tab.

Twórcy

autor

Assumpção Raphael França

• Universidade Federal de Minas Gerais, Department of Metallurgical and Materials Engineering, Belo Horizonte, Brazil

• https://orcid.org/0000-0002-1601-551X

autor

Fortes Monteiro Jessica C.

• Universidade Federal de Ouro Preto, Department of Chemistry, Campus Morro do Cruzeiro, Brazil

• https://orcid.org/0000-0003-0838-2608

autor

Campideli Victor Cardoso

• Universidade Federal de Ouro Preto, Department of Chemistry, Campus Morro do Cruzeiro, Brazil

• https://orcid.org/0000-0001-6262-2268

autor

Santos Dagoberto

• Universidade Federal de Minas Gerais, Department of Metallurgical and Materials Engineering, Belo Horizonte, Brazil

• https://orcid.org/0000-0001-8563-1060

autor

Sicupira Dalila C.

• Universidade Federal de Ouro Preto, Department of Chemistry, Campus Morro do Cruzeiro, Brazil

• https://orcid.org/0000-0003-2552-6845

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Uwagi

The authors are grateful to Aperam South America for the steel samples supply. Also thank the CAPES-PPGEM/UFMG-REDEMAT/UFOP, CNPq and FAPEMIG for the student fellowship and financial support. Thanks to Centro de Microscopia - UFMG for transmission electron microscopy examination.