ALUMINIUM MATERIAL PASSIVATOR, ALUMINIUM MATERIAL AND METHOD FOR PASSIVATION TREATMENT OF SURFACE THEREOF

• Main Author: WAN, Hua
• Format: Patent
• Language: Chinese; English; French
• Published: 04.01.2018
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The present invention relates to an aluminium material passivator, an aluminium material and a method for the passivation treatment thereof. The aluminium material passivator is used for the pretreatment of the surface of an aluminium material, and comprises the following components in parts by weight based on 1000 parts by weight: 10-30 parts of phosphoric acid, 1-5 parts of potassium dichromate, 0.1-0.4 parts of sodium fluorosilicate, 2-5 parts of nitric acid, 1-4 parts of potassium nitrate and the balance of water. A film layer formed from the aluminium material passivator has a good corrosion resistance and a strong bonding force with a coating, and can be used as a good substrate for subsequent treatments such as paint coating. In addition, after the treatment of a workpiece, a film of the surface of the workpiece is grass green, and the main component is trivalent chromium, more environmentally friendly than hexavalent chromium. La présente invention concerne un agent de passivation de matériau d'alumin