Tecnologia em Metalurgia, Materiais e Mineração (Oct 2014)

CHARACTERIZATION AND PROCESSING OF SCALES FROM THE MECHANICAL DESCALING OF CARBON STEELS FOR RECYCLING AS COATING PIGMENTS

  • Anderson de Oliveira Fraga,
  • Tarso de Souza Martins,
  • Cesar Radalle Biasi ,
  • Luís Frederico Pinheiro Dick

DOI
https://doi.org/10.4322/tmm.2014.031
Journal volume & issue
Vol. 11, no. 3
pp. 210 – 215

Abstract

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The large volume of solid wastes generated as scales in Steel Mills accounts to circa 1% to 2% of the total steel production and has led to studies aiming the recycling of scales, usually resulting in products of low added value. In this study, scales from the mechanical descaling of SAE 1045 steel were characterized by SEM and by quantitative X-Ray diffraction (Rietveld method), as well as by differential thermal analysis, aiming to develop its pretreatment for the further use as lamellar pigments in anticorrosive coatings of high added value. Aspect ratios between 1:50 and 1:100 were obtained by the processing of scales, which allows the replacement of other micaceous iron oxides.

Keywords