| abstract |
The present invention relates to a new formulation of an etch treatment bath of the polymer prior to metallization or coating of the polymer using techniques known and described in the prior art, based on the use of salts and/or complexes of Cr(III) cations. . The formulation of the present invention comprises at least one or several single-, double-, three-, four-, five-, six- or cross-linked ligands that are coordinated to chromium through oxygen, sulfur or nitrogen atoms or some of these atoms. Cr(III) salts and/or complexes to be coordinated. Once the polymer piece is etched with the etching formulation described above, the metal coating is applied through a chemical and plating bath in case of metallization, or through a paint or other organic coating. |