CPC C23F 11/04 (2013.01) [C23F 11/147 (2013.01); C23F 11/182 (2013.01); C23G 1/04 (2013.01)] | 13 Claims |
1. A composition, in the form of an aqueous formulation, comprising at least one sulfonic acid and at least one compound of formula (1)
O═N—OX (1)
in which X is chosen from:
NO;
a linear or branched alkyl radical R comprising from 1 to 6 carbon atoms;
an aryl radical Ar which is optionally substituted by at least one alkyl radical R;
a radical —SO2-G, in which G represents H, OH, R, OR, OM, Ar, OAr, NH2, NHR and NRR′, in which R and Ar are as defined above, R′ represents a linear or branched alkyl radical comprising from 1 to 6 carbon atoms and M represents a monovalent or bivalent metal cation; and
a radical —CO-G, in which G is as defined above,
wherein the compound is in an amount effective for limiting, or even preventing, the corrosion of metals by sulfonic acids.
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