Resumen de Acción inhibidora del ácido pirogálico en la corrosión del hierro por el agua del mar

Emilio Jimeno Gil, Antonio Arévalo Arocena

• In this work is explained the inhibitory action of pyrogallic acid when found in a small quantity of potassium hydroxide at the rate of KOH gr./ acid gr.=0,3; its effectiveness becomes manifest in concentrations of 4 to 5 grs. per litre. The possibility of replacing sodium sulphite by pyrogallic acid in boiler feed waters is advised.

  Although the data are not numerous, the possible existence of a minimum value of the concentration of dissolved oxygen may be deduced, up to which corrosion is a lineal function of such concentration, but when the proportion of oxygen drops from this value, the corrosion increases instead of diminishing.