Abstract:
The purpose of this work is to present a relationship between thermal treatment and corrosion resistance in SAE 1010/20 - A36 Steel, analyzing this behavior by means of Electrochemical Impedance Spectroscopy (EIS) tests. The appearance of a phenomenon called banding, which was identified in the sample, and the minimization of this effect through the heat treatment of full annealing, was presented in this work in order to complement the conclusions obtained. Also, grain size calculations showed that there is an increase in the size of the austenitic grain and, later, how this increase can modify the physical properties of the steels (consequence of the variation in grain boundary density). The relationship between grain size and corrosion resistance is not direct, which has motivated the conduction of studies to understand this effect. In this way, research was done to analyze this phenomenon and possible benefits.