Influence of the amount of ferric/ferrous ions on the corrosion resistance of a NiCrMo alloy in high‐temperature sulfuric acid solutions

Nickel‐based alloys have an excellent corrosion resistance in high‐temperature sulfuric acid solutions. Some data on the effects of ferric and ferrous iron on the uniform corrosion rate are to be found in the literature. Based on the results of a series of immersion tests, a quantitative model is proposed for the uniform corrosion rate of a NiCrMo alloy at 98 °C as a function of sulfuric acid concentration, total iron content, and the ferrous to...