Use of thioglycol ethoxylate as a corrosion inhibitor

摘要

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.

主权项

1. 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),whereA 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, andp and p′ each independently correspond to an integer of from 2 to 4.