Last year we have been discussing in detail many different forms and cases of corrosion in ammonia and urea plants. To really understand the background and fundamentals of these corrosion problems it is necessary to introduce the modern electrochemical theory of aqueous corrosion.
Although the presentation is necessarily simplified and brief we think this theory will contribute to a better understanding of corrosion phenomena. Our first paper did cover thermodynamic principles while this paper discusses electrode kinetics. The next paper will discuss the application of electrochemical corrosion theory on corrosion reactions in general and in carbamate solutions specific.