초록 ▼

Corrosion of metals in contact with liquid systems is reduced by adding to the system a small amount of an amino carboxylic acid containing at least one hydrophobic group in combination with another nitrogen containing compound. The other compound is preferably an ether amine or a quaternary ammoniu

Corrosion of metals in contact with liquid systems is reduced by adding to the system a small amount of an amino carboxylic acid containing at least one hydrophobic group in combination with another nitrogen containing compound. The other compound is preferably an ether amine or a quaternary ammonium compound which also contain hydrophobic groups. The combination of substances is particularly useful for preventing corrosion in different areas of oil recovery and in petroleum industry.

대표청구항 ▼

A method of preventing corrosion of metals in contact with liquid systems, characterized in that, to the systems is added an effective amount of an amino carboxylic acid having the general formula [Figure] wherein R is an organic hydrophobic group having 6 to 22 carbon atoms, R1 is hydrogen, an alky

A method of preventing corrosion of metals in contact with liquid systems, characterized in that, to the systems is added an effective amount of an amino carboxylic acid having the general formula [Figure] wherein R is an organic hydrophobic group having 6 to 22 carbon atoms, R1 is hydrogen, an alkyl group having 1 to 4 carbon atoms or has the same meaning as R and n is an integer from 1 to 10, in combination with a nitrogen containing compound selected from the groups (a) mono-, di- or polyamines (b) ether mono-, di- or triamines, (c) quaternary ammonium compounds, whereby the compounds of the groups (a), (b) and (c) contain at least one organic hydrophobic group having 6 carbon atoms or more, or (d) a cyclic nitrogen containing compound being morpholine, cyclphexylamine or imidazolines.