Nano alumina has special mechanical and chemical properties, such as high chemical stability, high hardness, high temperature wear resistance and corrosion resistance, etc., and can be used as the enhanced second phase of the metal matrix composite to be applied to the surface of the device, thereby improving its resistance Wear and corrosion resistance.

The results of X-ray diffraction analysis and scanning electron microscope observation of Zn-Ni/nano Al2O3 composite coatings with different Ni and Al2O3 contents show that when the contents of Ni and Al2O3 are about 13% and 0.4%-0.6%, respectively, Zn-Ni nano The crystal structure of the Al2O3 composite coating is relatively simple, and the obtained coating is dense, uniform, and smooth, with relatively long-lasting and excellent corrosion resistance.

The Zn-Ni/nano Al2O3 nano composite coating has finer crystals than pure Zn coatings and Zn-Ni alloy coatings, and the grain arrangement is more uniform and orderly, so it has excellent corrosion resistance.

The results of the neutral salt spray test show that the corrosion resistance of the Zn-Ni/nano Al2O3 nanocomposite coating is higher than that of the pure Zn coating and the Zn-Ni alloy coating, and it contains 13% nickel and 0.4%-0.6% Al2O3 when Zn-Ni/nano The corrosion resistance of Al2O3 composite coating is good.

After Al2O3 particles are incorporated into the coating, the porosity of the coating can be reduced, thereby greatly reducing the possibility of direct chemical corrosion and electrochemical corrosion of the substrate. When the coating is corroded by salt water, Al2O3 particles will cover the surface of the coating together with the corrosion products of the coating to slow down the corrosion.

SAT NANO can supply al2o3 aluminia nanopowder 30-50nm and al2o3 dispersion, if you have any enquiry, please feel free to contact us at admin@satnano.com