CORROSION RESISTANCE PASSIVATION FORMULATION AND PROCESS OF PREPARATION THEREOF

• Main Authors: KULKARNI, ASHISH SHARAD, KULKARNI, SHARAD VASUDEO, MAHENDIRAN, RASKESH, MAHAJAN, SUBHASH SUKHDEORAO, BHOITE, GAJANAN SHIVAJI, PONKSHE, SHRIPADRAJ RAMCHANDRA, KULKARNI, JAIDEEP SHARAD
• Format: Patent
• Language: English; French; German
• Published: 05.02.2014
• 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 provides a passivation formulation and a process for forming trivalent chromium-based passivation film on zinc and zinc alloys. The passivation film incorporates nano-ceramic particles resulting in higher corrosion resistance as compared to a trivalent chromium passivation film without nano-sized ceramic particles. The corrosion resistance of the coating is further enhanced by a topcoat or a sealant