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vol.76 número159EXPERIMENTAL EVALUATION OF CORROSION RESISTANCE OF AN AISI - SAE 4140 STEEL IMPLANTED WITH NITROGEN IONSMAGNETIC AND STRUCTURAL STUDIES OF (Sn, Ni -Sn) SUBSTITUTED BARIUM HEXAFERRITES SYNTHESIZED BY BALL MILLING índice de autoresíndice de assuntospesquisa de artigos
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DYNA

versão impressa ISSN 0012-7353

Resumo

LOPEZ, DIANA; TSCHIPTSCHIN, ANDRÉ PAULO  e  FALLEIROS, NEUSA ALONSO. SINERGISMO EROSIÓN-CORROSIÓN EN UN ACERO INOXIDABLE MARTENSÍTICO AISI 410: EROSION-CORROSION SYNERGISM OF AN AISI 410 MARTENSITIC STAINLESS STEEL. Dyna rev.fac.nac.minas [online]. 2009, vol.76, n.159, pp.53-60. ISSN 0012-7353.

In this work, the behavior of an AISI 410 martensitic stainless steel under corrosion-erosion conditions is evaluated. Quenched and tempered samples were used for the wear test, using a low velocity jet-like device connected to a potentiostat. Potentiodynamic polarization curves were obtained with the electrolyte in static state, with flow conditions and under corrosion-erosion, adding quartz particles to the electrolyte. In addition, mass loss measurements under erosion and corrosion-erosion conditions were carried out. The topography of the surfaces was examined after the wear tests, using optical and scanning electron microscopy. This information, together with the results of mass losses and the electrochemical tests were used to establish the degradation mechanisms of the stainless steels under different testing conditions. The results showed that synergism is a significant part of the degradation process of this steel (66.5%) and that the mass removal process of steel was controlled by corrosion assisted by erosion.

Palavras-chave : Stainless steels; erosion-corrosion; synergism.

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