Aqueous solution for the cold-working treatment of steel sheet
AssigneeSollac
InventorsHerve Derule, Valerie Bour Beucler, Jean Steinmetz
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Abstract
According to the invention, the solution contains a water-soluble salt of heptanoic acid and an oxidizing agent and, preferably, a wetting agent. By virtue of the combination of these compounds, low concentrations are sufficient to obtain satisfactory corrosion protection, which makes it possible to maintain a nonfatty surface appearance (on the treated sheet) and facilitates the treatment of the solution effluent (or that of the subsequent degreasing effluent).
Claims8
An aqueous solution comprising less than or equal to 2.times.10.sup.-2 mol/liter of a water-soluble salt of heptanoic acid, an oxidizing agent, and a wetting agent, wherein the molar concentration of the oxidizing agent is 0.1-1 times the molar concentration of said water-soluble salt of heptanoic acid.
Dependencies are inferred from the claim text.