CORROSION RESEARCH ROUND‐UP

FRANCE Bacterial corrosion. Sulphate reducing bacteria are anaerobic and autotropic, and they have no need for organic substances. Their need of carbon is supplied by CO2 or bicarbonates. They gain their energy from the reaction of the sulphate with H, which is available as a gas, or via the iron acting as a local cathode. The corrosion is greatly accelerated by adding ferrous iron and yeast, but the latter, supplied without the iron, acts as an inhibitor.—(M. E. Adams and T. W. Farrer, Chim. et Ind., 70 (3), 441.)