Evaluating the corrosion resistance of ubm-deposited cr/crn multilayers

This work was aimed at evaluating the corrosion resistance of multilayer Cr/CrN coatings deposited by the unbalan-ced magnetron sputtering (UBM) technique. Coatings were produced at room temperature using 400 mA discharge current, 9 sccm argon flow and 3 sccm nitrogen flow. The total thickness of coatings deposited on AISI 304 stainless steel and silicon (100) varied between 0.2 a 3 μm as bilayer period varied between 20 and 200 nm. Coating microstructure and chemical composition was stu-died through scanning electron microscopy (SEM) and tex-ture and crystalline phases were analysed by X-ray diffraction (XRD) before and after corrosion tests which were carried out by potentiodynamic polarisation using 0.5 M H2SO4 + 0.05M KSCN solution. Lower bilayer period coatings presented better corrosion resistance and their corrosion mechanism is discussed in this article.

• Autores: Chipatecua Godoy, Yuri Lizbeth; Marulanda Cardona, Diana Maritza; Olaya Flórez, Jhon Jairo
• Tipo de recurso: Article of journal
• Fecha de publicación: 2011
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/33467
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/33467; http://bdigital.unal.edu.co/23547/; http://bdigital.unal.edu.co/23547/2/; http://bdigital.unal.edu.co/23547/3/
• Palabra clave: sputtering con magnetrón desbalancea-do; polarización potenciodinámica; películas delgadas; resistencia a la corrosión; Cr/CrN.; Unbalanced magnetron sputtering; potentiodynamic polarisation; thin film; corrosion resistance; Cr/CrN.
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional