Formulation for etching prior to coating polymeric materials thereof

The present invention relates to a new formulation of baths etching treatment prior to the metallization or polymer coating by known and described technologies in the prior art, which are based on the use of salts and / or complexes of polymers cation Cr (III). # the formulation of the present invention consists of a salt and / or a Cr (III) Cr (III) is coordinated to at least one or more ligands mono-, bi-, tri- , tetra-, penta-, hexadentate or bridge coordinate chrome by the oxygen atom, sulfur or nitrogen or more of these atoms ligand. # once etched the polymeric part with the formulation of etching described above, it proceeds to metal coating by applying chemical and electrolytic baths in the case of metallized, or by applying paint or other organic coating base.