Abstract
Quantities of dissolution residue of cupric oxide powder in dilute sulfuric acid after definite minutes at the presence of specified surfactants were measured.
As the surfactants used, several anionic, cationic and nonionic surface active agents as well as sodium hexametaphosphate and tripolyphosphate were used.
The results were as follows :
When surfactants were used individually, sodium hexametaphosphate, tripolyphosphate, dialkyl-dithiophosphate, Ca-lignosulfonate and Ca-creosote-tamol were excellent as inhibitors of acid corrosion, while lignosulfonate or di-naphthylmethanedisulfonate homologue with hexametaphosphate was most excellent among combinations of surfactants mentioned above.
