Título
CORROSION BEHAVIOR OF SINTERED FERRITIC STAINLESS STEELS WITH BORON ADDITIONS
Autor
JOSE ANGEL CABRAL MIRAMONTES
JOSE GUADALUPE CHACON NAVA
Nivel de Acceso
Acceso Abierto
Materias
Resumen o descripción
Nowadays, industries producing steel parts by powder metallurgy (PM) have
expanded faster than those using the conventional process. This is due to the
PM oustanding advantages such as the fabrication of high quality parts with
almost any geometry, strict dimensional tolerances, energy savings and lower
production costs. However, despite these advantages, their applications could
be limited under corrosive environments i. e. special care shoul be taken
against corrosion. Better properties of the sintered products can be obtained
when the sintering process is carried out in liquid phase, which can lead to
higher densification, and this can be achieved by boron addition to the stainless
steel powders. The aim of this work was to evaluate the corrosion behavior of a
sintered 409Nb stainless steel with different boron contents (0.8%wt, 1.0%wt,
and 1.2 %wt), exposed to two test solutions i.e. 0.5M H2SO4 and 0.5M NaCl.
Thus, various electrochemical techniques such as linear polarization resistance
(LPR), potentiodynamic polarization curves (PPC) and electrochemical noise
(EN), were used. The results gave evidence that the samples without boron
additions exposed to the NaCl solution disclosed similar behavior as compared
with that of samples produced by conventional casting. However, the samples
with boron additions had higher corrosion rates irrespective of the solution used.
On the whole, an at least for the conditions of the present work, the addition of
boron is harmful to corrosion resistance of a 409Nb stainless steel produced by
powder metallurgy.
Fecha de publicación
2011
Tipo de publicación
Memoria de congreso
Versión de la publicación
Versión enviada
Recurso de información
Formato
application/pdf
Idioma
Español
Repositorio Orígen
Fuente de Objetos Científicos Open Access
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