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Effect of high anodic polarization on the passive layer properties of superduplex stainless steel friction stir welds at different chloride electrolyte pH values and temperatures

Santa-Cruz, L. A. ; Machado, G. ; Vicente, A. A. ; Hermenegildo, T. F. C. ; Santos, T. F. A.

International journal of minerals, metallurgy and materials, 2019-06, Vol.26 (6), p.710-721 [Periódico revisado por pares]

Beijing: University of Science and Technology Beijing

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Título:
Effect of high anodic polarization on the passive layer properties of superduplex stainless steel friction stir welds at different chloride electrolyte pH values and temperatures
Autor: Santa-Cruz, L. A. ; Machado, G. ; Vicente, A. A. ; Hermenegildo, T. F. C. ; Santos, T. F. A.
Assuntos: Anodic polarization ; Ceramics ; Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Composites ; Corrosion ; Corrosion and Coatings ; Corrosion potential ; Corrosion resistance ; Corrosion tests ; Duplex stainless steels ; Electrodes ; Electrolytes ; Electrolytic etching ; Friction ; Friction stir welding ; Glass ; Heterojunctions ; Image acquisition ; Intermetallic phases ; Materials Science ; Metallic Materials ; Microscopy ; Molybdenum ; Natural Materials ; P-n junctions ; Polarization ; Scanning electron microscopy ; Stainless steel ; Steel alloys ; Surfaces and Interfaces ; Temperature ; Thin Films ; Tribology ; Welding
É parte de: International journal of minerals, metallurgy and materials, 2019-06, Vol.26 (6), p.710-721
Descrição: The conditions used for friction stir welding of duplex stainless steels determine the resulting mechanical and corrosion performance of the material. This study investigates the corrosion resistance of UNS S32750 and S32760 superduplex stainless steels (SDSSs) joined by friction stir welding, employing cyclic polarization, Mott-Schottky, and microscopy techniques for analysis. The microscopy images indicated the presence of a deleterious intermetallic phase after electrolytic etching of S32760, as well as decreased corrosion resistance. The presence of molybdenum in the steels promoted better passive behavior at low pH. The Mott-Schottky curves revealed p-n heterojunction behavior of the passive oxide. Images acquired after the polarization test by scanning electron microscopy showed higher passivation propensity with increases of temperature and pH.
Editor: Beijing: University of Science and Technology Beijing
Idioma: Inglês

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Effect of high anodic polarization on the passive layer properties of superduplex stainless steel friction stir welds at different chloride electrolyte pH values and temperatures

Santa-Cruz, L. A. ; Machado, G. ; Vicente, A. A. ; Hermenegildo, T. F. C. ; Santos, T. F. A.

Beijing: University of Science and Technology Beijing

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