Anodic synthesis of polyaniline coatings onto Fe sheets

In the reported experiments, aniline black coatings were obtained on Fe anodes by electrolyzing a basic solution of aniline in a water-methanol medium. Allylamine (an inhibitor of Fe corrosion), although not essential to the process, imparts better efficiency to it. The deposited polymers contain 15-20% azobenzene and exhibit semiconductor properties. The three nitroaniline isomers need a more efficient corrosion-inhibition system. They may be polymerized to adherent films in the presence of both allylamine and K//2CrO//4.