Corrosion of Iron in Anhydrous Organic Solvents Containing Electrolytes and Its Inhibition

摘要

Our recent studies on the corrosion of iron in anhydrous organic solvents containing electrolytes are reviewed. When iron corrodes in anhydrous methanol containing 0.1 M LiClO_4, a precipitate of ferrous methoxide Fe(OCH_3)_2 forms on its surface. Iron undergoes the same kind of electrochemical corrosion in anhydrous acetonitrile and dimethylformamide solutions of carboxylic acids as in an aqueous solution. The anodic process of iron corrosion in anhydrous methanol solution is stimulated by adding complexing agents to form soluble complexes with Fe~(2+) at the surface. Iron corrosion is accelerated in anhydrous methanol and acetonitrile solutions containing FeCl_3 and is suppressed by the addition of adsorption-type corrosion inhibitors.