Preventing corrosion in liquids in oil fields

摘要

Corrosion in liquids in oil fields is prevented by adding an effective amount of a betaine or ampholyte of formula (I) or (II) to the liquids: where R1 = 10-20C alkyl or alkenyl pref. 14-18C alkyl or alkenyl; R2 and R3 = 1-4C alkyl pref. methyl.