During the last year we have been discussing in detail many different forms and cases of corrosion in ammonia and urea. To really understand the background and fundamentals of these corrosion problems it is necessary to introduce to you 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. At first in this paper we will approach thermodynamic principles. In a next paper we will discuss electrode kinetics and the application of electrochemical corrosion theory on corrosion reactions in general and in carbamate solutions specific.