| abstract |
The present invention relates to novel formulations of baths for etching treatment of polymers prior to metallization or coating of polymers using techniques known and described in the prior art, based on the use of salts and/or complexes of Cr(III) cations. . The formulations of the present invention may contain at least one or several monodentate, bidentate, tridentate, tetradentate, pentadentate, hexadentate or Cr(III) bridging ligands coordinated to chromium via an oxygen, sulfur or nitrogen atom or some of these atoms. This coordinating Cr(III) salt and/or complex is included. Once the polymer pieces have been etched with the etch formulations described above, the metal coating is applied either through chemical and plating baths in the case of metallization, or through paints or other organic coatings. |