Corrosion behavior of AISI 409Nb stainless steel manufactured by powder metallurgy exposed in H2SO4 and NaCl solutions

Cabral Miramontes, José Ángel y Barceinas Sánchez, J.d.O y Poblano Salas, Carlos y Pedraza Basulto, G. K. y Nieves Mendoza, Demetrio y Zambrano Robledo, Patricia del Carmen y Almeraya Calderón, Facundo y Chacón Nava, José G. (2013) Corrosion behavior of AISI 409Nb stainless steel manufactured by powder metallurgy exposed in H2SO4 and NaCl solutions. International journal of electrochemical science (8). pp. 564-577. ISSN 1452-3981 (Entregado)

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Resumen

Powder metallurgy is an effective method for manufacturing stainless steel parts of high quality and accuracy at low cost. However, the use of sintered stainless steels is limited due to their low density, which deteriorates their corrosion resistance. The aim of this study was to determine the corrosion behavior of AISI 409Nb stainless steel specimens sintered with different contents of boron in a hydrogen atmosphere. Boron was added for promoting the formation of a liquid phase during sintering at 1150 °C, thereby achieving a reduction of porosity and increase in density, which is necessary to improve corrosion resistance. The electrochemical techniques of linear polarization resistance (LPR) and electrochemical noise (EN) were used to determine the corrosion behavior of samples with and without additions of boron after immersion in two solutions, 0.5M H2SO4 and 0.5M NaCl. The corrosion rates and the possible corrosion mechanisms in the sintered samples were determined. The results indicate that the samples with boron additions are more prone to corrosion due to chromium carbide precipitation.

Tipo de elemento:

Article

Palabras claves no controlados:

Boro, Fase líquida, Pulvimetalurgia, Sinterización, Ruido electroquímico.

Materias:

T Tecnología > TN Ingeniería Minera. Metalurgia

Divisiones:

Ingeniería Mecánica y Eléctrica

Usuario depositante:

Editor Repositorio

Creadores:

Creador	Email	ORCID
Cabral Miramontes, José Ángel	NO ESPECIFICADO	NO ESPECIFICADO
Barceinas Sánchez, J.d.O	NO ESPECIFICADO	NO ESPECIFICADO
Poblano Salas, Carlos	NO ESPECIFICADO	NO ESPECIFICADO
Pedraza Basulto, G. K.	NO ESPECIFICADO	NO ESPECIFICADO
Nieves Mendoza, Demetrio	NO ESPECIFICADO	NO ESPECIFICADO
Zambrano Robledo, Patricia del Carmen	patricia.zambranor@uanl.edu.mx	NO ESPECIFICADO
Almeraya Calderón, Facundo	facundo.almerayacl@uanl.edu.mx	orcid.org/0000-0002-3014-2814
Chacón Nava, José G.	NO ESPECIFICADO	NO ESPECIFICADO