1 Molar concentration hydrofluoric acid effect at 400 C in the corrosion resistance of alloys containing nickel

Corrosion rate for pure nickel, Inconel 600 and Monel alloys in a 1 Molar hydrofluoric acid solution at a 40 0 C temperature were determined. For contrasting purposes both SAE 304 SS and SAE 316 SS were included. As expected these Stainless Steels do not show good corrosion performance in the solution used. Several expressions correlating the weight and thickness loss v/s time were obtained. In the particular case of Monel, up to 2.021 hours, two expressions for the weight loss and three expressions for the thickness loss were obtained with a close to 1,0 correlation coefficient value. The Monel showed the best overall corrosion performance among the tested alloys. (author)