In situ 3D monitoring of corrosion on carbon steel and ferritic stainless steel embedded in cement paste


Itty P., Serdar M., MERAL Ç. , Parkinson D., MacDowell A. A. , Bjegovic D., ...More

CORROSION SCIENCE, vol.83, pp.409-418, 2014 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 83
  • Publication Date: 2014
  • Doi Number: 10.1016/j.corsci.2014.03.010
  • Title of Journal : CORROSION SCIENCE
  • Page Numbers: pp.409-418
  • Keywords: Steel reinforced concrete, Stainless steel, Galvanostatic, Interfaces, Pitting corrosion, REINFORCED-CONCRETE STRUCTURES, INDUCED COVER CRACKING, X-RAY MICROTOMOGRAPHY, PITTING CORROSION, IMPRESSED CURRENT, RUST LAYER, CHLORIDE, ALKALINE, MORTAR, TIME

Abstract

In a X-ray microcomputed tomography study, active corrosion was induced by galvanostatically corroding steel embedded in cement paste. The results give insight into corrosion product build up, crack formation, leaching of products into the cracks and voids, and differences in morphology of corrosion attack in the case of carbon steel or stainless steel reinforcement. Carbon steel was homogeneously etched away with a homogeneous layer of corrosion products forming at the steel/cement paste interface. For ferritic stainless steel, pits were forming, concentrating the corrosion products locally, which led to more extensive damage on the cement paste cover. (C) 2014 Elsevier Ltd. All rights reserved.