| 摘要 |
A method of inhibiting corrosion on a metal surface by treating said surface with an effective amount of a compound of the formula <CHEM> wherein R1, R2, R3 and R4, independently of one another represent hydrogen, hydroxy or halogen or are alkyl, alkoxy, alkanoyloxy, or alkanoylamino groups which are unsubstituted or substituted by alkoxy, hydroxyl, halogen, aryl, cycloalkyl, azacycloalkyl, cyano or by polyalkyleneoxy, or two or more of adjacent R1-R4 together form one or more fused rings carbon or heterocyclic of 5 - 8 members each; Rf is perfluoroalkyl of 2 to 16 carbon atoms or perfluoroalkoxyalkyl of 4 to 16 carbon atoms and R is a) an alkylene of up to 16 carbon atoms which is unsubstituted or substituted by hydroxy, lower alkoxy, or halo, and which may be interrupted by oxygen, sulfur, carboxamido, sulfonamido, aminosulfonyl, aminocarbonyl, carbonyloxy, sulfinyl, or sulfonyl; or b) R is sulfonyl- or carbonylaminoalkylene or -aralkylene of up to 16 carbon atoms, which is unsubstituted or substituted by hydroxy, lower alkoxy, or halo, and said alkylene is uninterrupted or interrupted by oxygen, sulfur, carboxamido, sulfonamido, aminocarbonyl, aminosulfonyl, carbonyloxy, sulfinyl, or sulfonyl; or mixtures thereof.
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