Abstract
Three kinds of amine-type corrosion inhibitors, N-propyl-n-dodecyl amine, N-(2-hydroxyl propyl)-n-dodecyl amine and N-(2, 3-dihydroxyl propyl)-n-dodecyl amine are studied.
Chemical structures of these amines differ only in number of hydroxyl groups, which make them active in water. Soluble inhibitors are more mobile in water, so the better inhibition are maintained with them than with insoluble ones. But, on the contrary, more soluble inhibitors are able to depart more easily from metal surfaces than insoluble ones, so with soluble inhibitors, better inhibition can be obtained only when they are used in large amounts.
In conclusion, the best inhibition, we suggest, may be obtained from making insoluble inhibitors. and solvents disperse in corrosive media, with minimum amounts of emulsifiers.
