Abstract

APERADOR CHAPARRO, W; BAUTISTA-RUIZ, J  and  VARGAS USCATEGUI, A. Evaluation for Corrosion-Erosion in Austenitic and Martensitic Steels. Ciencia en Desarrollo [online]. 2015, vol.6, n.1, pp.17-24. ISSN 0121-7488.

This paper presents the results of evaluating the dynamic corrosion resistance, the erosion and corrosion-erosion, to impact angles of 30^° and 90^°, with respect to the sample surface in steel ASTM 240 (A240) or AISI 304 and steel ASTM 576 (A576) or AISI 1045. The electrochemical characterization was developed by the Tafel polarization curves and the micro-structural characterization by the scanning electron microscopy. There was a marked decrease in the corrosion rate for steel A 240 compared with A576, under the erosion corrosion and corrosion dynamics conditions. Mechanical wear indicated that the normal angle condition represents higher losses in the material thickness, compared to the grazing angle for the two classes of steels. When comparing the different study materials in normal condition and grazing angle, it is clearly observed that the steel ASTM A576 has the highest loss values volume, in equal exposure time, in comparison with the A240 steel. The scanning electron microscopy application techniques allowed to assess the dominant damage mechanisms and corroborated the results obtained by the electrochemical measurements.

Keywords : Martensitic Steel; Carbon Steel; Austenitic Steel; Erosion; Corrosion; SEM.

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