Preparation of Zn-nanosized zeolite composite film with potential corrosion resistance properties

The composite coatings with nano particles have certain superior mechanical and metallurgical property which finds extensive use in corrosion control. The zinc-Alloy coatings exhibited higher corrosion resistance property than pure zinc coating. A composite film of zinc and nano zeolite was electrodeposited on mild steel using zinc electrolyte containing dispersed nanosized zeolite. The corrosion treatment of the coating was studied in sodium chloride solution by electrochemical and mass decrease measurements. The study disclosed porous free nature and higher corrosion resistance property of composite coating. The service life of coatings was estimated from the results of salt spray test. The surface morphology was investigated by recording the scanning electron microscopy (SEM) images of coating before and after corrosion. The grain size of coating was calculated by XRD images, and Microhardness of the coating was measured.

Keywords:

corrosion , composite coating , zinc , nano zeolite , Electrodeposition