초록

Corrosion of metal surfaces in contact with an aqueous medium is inhibited by incorporating a N-(hydrophobe aromatic)pyridinium compound such as N-(p-dodecylphenyl)-2,4,6-trimethylpyridinium sulfoacetate into the aqueous medium.

대표청구항 ▼

A method of corrosion inhibition which comprises contacting a normally corrodible metal surface with an aqueous medium containing a N-(hydrophobe aromatic)pyridinium compound represented by the formula: [Figure] wherein each R1 moiety is independently alkyl, alkoxy, aryl, aryloxy, halo, cycloalkyl,

A method of corrosion inhibition which comprises contacting a normally corrodible metal surface with an aqueous medium containing a N-(hydrophobe aromatic)pyridinium compound represented by the formula: [Figure] wherein each R1 moiety is independently alkyl, alkoxy, aryl, aryloxy, halo, cycloalkyl, nitrile, carboxy or carboxyalkylene; or substituted forms of alkyl, aryl, aryloxy or alkoxy, wherein the substituent is halo, alkyl, aryl or alkoxy; or two adjacent R1 moieties are collectively alkylene or alkylene heteroalkylene to form a 5- or 6-membered carbocyclic or heterocyclic ring with the pyridinium ring; Ar is a divalent aromatic moiety having at least one aromatic carbocyclic ring or at least one aromatic heterocyclic ring; R2 is a hydrophobic moiety having a degree of hydrophobicity equal to or greater than a propyloxy moiety; X is an anionic counterion; and a is a number from 0 to 5; to 5; said pyridinium compound being present in an amount which is effective to inhibit the corrosion of the metal surface that normally occurs when the metal surface is contacted with an aqueous medium containing no corrosion inhibitor.