A method for inhibiting corrosion in a refinery crude distillation unit includes introducing a corrosion inhibition composition to the refinery crude distillation unit. The corrosion inhibition efficiency of the corrosion inhibition composition may be at least 80%. The corrosion inhibition composition may include a carrier fluid and a corrosion inhibitor consisting essentially of a compound represented by Formula (I): ##STR00001## where R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each, independently, a hydrogen or an alkoxy group, and m and n are each, independently integers ranging from 2 to 10, wherein R.sup.5 and R.sup.6 are each, independently, a saturated C.sub.6-C.sub.10 hydrocarbon group or an unsaturated C.sub.6-C.sub.10 hydrocarbon group.

A method for inhibiting corrosion of a corrodible metal surface that contacts a water stream in a geothermal well system. The method includes introducing into the water stream a corrosion inhibitor composition comprising: (i) a cationic surfactant, such as an imidazoline and/or a fatty amine ethoxylate, and (ii) an anionic surfactant.

A method for inhibiting corrosion in a refinery crude distillation unit includes introducing a corrosion inhibition composition to the refinery crude distillation unit. The corrosion inhibition efficiency of the corrosion inhibition composition may be at least 80%. The corrosion inhibition composition may include a carrier fluid and a corrosion inhibitor consisting essentially of a compound represented by Formula (I):

##STR00001##

where R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each, independently, a hydrogen or an alkoxy group, and m and n are each, independently integers ranging from 2 to 10, wherein R.sup.5 and R.sup.6 are each, independently, a saturated C.sub.6-C.sub.10 hydrocarbon group or an unsaturated C.sub.6-C.sub.10 hydrocarbon group.