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US 8,901,060 B2Granted
Use of thioglycol ethoxylate as a corrosion inhibitor
AssigneeBASF SE
InventorsStefan Faβbender, Peter Kolb
Life of this patent
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Abstract
The present invention relates to an acidic, aqueous composition which comprises a thiodiglycol alkoxylate for treating metallic surfaces. The invention furthermore relates to the use of one or more compound(s) of the general formula (I) as a corrosion inhibitor.
Claims19
A process for pickling a metallic surface, the process comprising:
- treating the metallic surface with an acidic, aqueous composition,
- wherein the composition comprises:
- an acid;
- water;
- and
- a compound of formula (I)
- HO—(A)n(B)m—CpHp+2—S—Cp′Hp′+2—(B)m′(A)n′—OH (I),
- where
- A is ethylenoxy,
- B is C3-5-alkylenoxy or at least one mixture of C3-5-alkylenoxy groups,
- A and B are present in random distribution, alternately, or in the form of two or more blocks in any sequence,
- n and n′ each independently correspond to a number of from 1 to 50,
- m and m′ each independently correspond to a number of from 0 to 50, and
- p and p′ each independently correspond to an integer of from 2 to 4.
11 more elements
A method of inhibiting corrosion, comprising:
- treating a material with a compound of formula (I)
- HO—(A)n(B)m—CpHp+2—S—Cp′Hp′+2—(B)m′(A)n′—OH (I)
- wherein
- A is ethylenoxy
- B is C3-5-alkylenoxy or at least one mixture of C3-5-alkylenoxy groups,
- A and B are present in random distribution, alternately, or in the form of two or more blocks in any sequence,
- n and n′ each independently correspond to a number of from 1 to 50,
- m and m′ each independently correspond to a number of from 0 to 50,
- p and p′ each independently correspond to an integer of from 2 to 4, and
- the compound of formula (I) serves as a corrosion inhibitor.
7 more elements
Dependencies are inferred from the claim text.