Corrosion behavior of each phase in low carbon microalloyed ferrite-bainite dual-phase steel: Experiments and modeling

In situ observation of the initial corrosion behavior of a low carbon microalloyed ferrite-bainite dual-phase steel showed that the corrosion originated from the inside of ferrite and ferrite boundary. In addition, a model for describing the corrosion behavior of each phase in multiphase steel was established. Based on this model, a method to quantitatively assess the corrosion rate of each phase was presented by white light interference, and the relationship between the surface roughness and corrosion morphology was also established. Meanwhile, the galvanic corrosion at phase-scale and the influence of phase distribution on service safety of multiphase steel were discussed. (c) 2013 Elsevier Ltd. All rights reserved.