Method for preventing corrosion in water-carrying systems

摘要: In the inhibition of corrosion and scale formation in a water-carrying system wherein to water there is added phosphonocarboxylic acid formula ##STR1## which R hydrogen, an alkyl, alkenyl or alkinyl radical having up 4 carbon atoms, aryl, cycloalkyl aralkyl radical, ##STR2## R' alkyl atoms carboxyl radical; X ##STR3## improvement comprises further adding about 5 500% by weight at least one member selected from group consisting benzimidazole derivative, polyacrylamide, polyethyleneimine, polyvinylpyrrolidone lignin sulfonate.