Corrosion inhibitors
AssigneeBromine Compounds Ltd.
InventorsSerge Gutman, Sharon Krumbein, David Itzhak, Mira Bergstein Freiberg
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Abstract
Provided is an anticorrosive composition for use in aqueous salt solutions. The composition contains an antimony compound and at least two other components selected from morpholine derivatives, acetylenic alcohols, ascorbic acid derivatives, and selenium compounds. The composition is particularly useful for inhibiting corrosion of metallic surfaces of drilling devices or refrigeration systems that are in contact with salt brines at elevated temperatures.
Claims38
An antimony-based corrosion inhibitor for reducing metal corrosion induced by salt solutions, comprising an antimony compound and at least two compounds selected from two of the four following compound families:
- i. morpholine and morpholine derivatives;
- ii. acetylenic alcohols;
- iii. ascorbic acid derivatives;
- and
- iv. selenium compounds.
A corrosion inhibitor composition, comprising an antimony compound and any combination of two or more compounds selected from the following compound families:
- i. morpholine and morpholine derivatives;
- ii, acetylenic alcohols;
- iii. ascorbic acid derivatives;
- and
- iv. selenium compounds;
- wherein two of the compounds of said combination belong to different families.
26-37. (canceled)
A method of inhibiting metal corrosion in a heavy brine fluid, comprising admixing to said fluid an antimony compound, and two or more compounds selected from at least two of the four following compound families:
- i. morpholine and morpholine derivatives;
- ii. acetylenic alcohols;
- iii. ascorbic acid derivatives;
- and
- iv. selenium compounds;
- wherein said two or more selected compounds belong to at least two of said four families.
A formulation for use in inhibiting metal corrosion in heavy brine fluids, comprising an antimony compound, and at least two compounds selected from at least two of the four following compound families:
- i. morpholine and morpholine derivatives;
- ii. acetylenic alcohols;
- iii. ascorbic acid derivatives;
- and
- iv. selenium compounds.
Dependencies are inferred from the claim text.