Organic rust converters

It must be first of all asked what rust really is. The question may seem to have an obvious answer. Anybody who has had anything at all to do with iron is acquainted with the effect of rust. Nevertheless, it has to be admitted that even a number of researchers who have dedicated themselves to the subject do not have such clear ideas about it as might be assumed on the first approach. The cause of rust has always been, and still is, a subject of research and discussion, especially in the light of modern electrochemical theory which indicates to us very clearly that to attribute to rust the binomial ‘water+atmospheric oxygen’ alone is a solution which is far too simplistic. A lot of theories have been put forward in this matter, but we shall obviously not have time to study them all. According to J. N. Friend, iron which has been subjected to the combined attack of water vapour and atmospheric oxygen only corrodes quickly when carbon dioxide is present, even in small quantities.