| 摘要 |
The present invention relates to nitrogen-containing hydroxyethyl substituted compounds to be used as corrosion inhibitors for metal surfaces, for example in aqueous systems and in particular in oil-field applications, e.g. in oil or gas wells, and which could be used under sweet-well conditions as well as under sour-well conditions. It may also be used in oil-field acidizing and fracture-acidizing well stimulation treatment. The compounds belong to the group of partly ethoxylated fatty alkylamines, partly ethoxylated alkyletheramines and partly or fully hydroxyethyl substituted alkylamdopropylamines. The corrosion inhibitors have the formula (I) where R is a hydrocarbyl or an acyl group having 14-24 carbon atoms, or the group R'OCH2CH2CH2 where R' is a hydrocarbyl group with 14-24 carbon atoms ; X is hydrogen, C2H4OH or the group Y is hydrogen or C2H4OH and n is 0-3, with the proviso that at least one of the symbols X and Y is C2H4OH, at most one of the symbols X is n is at least one when R is an acyl group, and when R is a hydrocarbyl group or the group R'OCH2CH2CH2 at least one of the symbols X and Y is hydrogen. |
