Analysis of the electrochemical behavior of a super ferritic stainless steel model alloy containing 0.07 % boron

Abstract

Abstract For the present research, a super ferritic stainless steel model alloy with 4.4 wt.% nickel addition was produced. Due to the increased nickel content, the chromium content was also increased to 25.7 wt.% in order to maintain the ferritic phase stability, including a molybdenum content of 4.6 wt.% to increase the corrosion resistance. A boron content of 0.07 wt.% was also added in order to increase temperability, toughness and stability of grain boundaries. The effect of solution annealing treatments on the microstructure and corrosion resistance of the 0.07 wt.% boron model alloy was studied at temperatures of 1150 °C and 1200 °C for different times. After the solution treatments, there was an increase in the corrosion resistance of the alloy and also for the critical pitting temperature, showing that the solution treatments performed were efficient for the alloy to achieve good properties for industrial applications.