Electrical polarization phenomena occurring in corrosion and polarographic processes are compared, and certain similarities are pointed out. On this basis, results of polarographic studies of a number of corrosion inhibitors are presented, particularly for the iron‐sulfuric acid system. It is found that these inhibitors considerably suppress one or more of the oxygen, lead, or nickel polarographic maxima. The maxima‐suppressing effectiveness of compounds known to inhibit corrosion by adsorption is a function of concentration resembling gas adsorption isotherms. Furthermore, certain inhibitors which function by either anodic or cathodic polarization are also effective in suppressing either anodic or cathodic maxima. Some general inhibitors are general maxima suppressors as well.