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AssigneesUniversite De Pau Et Des Pays De L'adour, Centre National De La Recherche Scientifique, Soule Peintures Industrielles AERO
InventorsJérôme FRAYRET, Mathieu POURRILLOU, Sandra ZOCCALI, Jean-Charles DUPIN, Arnaud UHART
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The present invention relates to a solution that is free of chromium in all its oxidising states, comprising: - at least one chemical oxidising compound, - at least one aluminium complexing agent, - at least one corrosion inhibiting compound, and -optionally, a chemical sealant compound, the solution having a pH in the range from 1 to 5. The present invention also relates to a method for treating a metal surface, comprising the application, on the surface, of a solution as defined above. The present invention additionally relates to a coating of a metal surface that can be obtained by the method for treating a metal surface as defined above, to a metal surface comprising the coating and to the use of the solution in an anti-corrosion treatment of a metal surface.
A solution free of chromium in all its oxidation states, comprising
The solution as claimed in any one of the preceding claims, in which the corrosion inhibitor is chosen from rare-earth metal, tungstate, vanadate, phosphate and cerium(III) salts, zirconium, titanium or silicon salts.
The solution as claimed in any one of the preceding claims, also comprising a plugging chemical compound based on phosphate ions, phosphonate ions or polyphosphate ions or iron ions.
Dependencies are inferred from the claim text.