Ceramic coating capable of resisting high-temperature corrosion for protecting hanging part in tin bath of float glass and preparation method thereof

Abstract

The invention discloses a ceramic coating capable of resisting high-temperature corrosion for protecting a hanging part in a tin bath of float glass and a preparation method thereof. The preparation method comprises: dispersing SiO2, FeO, TiO2, Cr2O3, NiO, CoO and alkali metal compounds in water to obtain slurry with a solid content of 50-70%, grinding the slurry with a ball milling method to obtain an abrasive, then applying the abrasive on the cleaned surface of the hanging part and then sintering the surface of the hanging part and the coating. The resulting high-temperature ceramic coating has high-temperature anti-oxidation capacity and can also effectively improve the corrosion resistance of the surface of a Ni-Cr high-temperature alloy; and in addition, the ceramic coating can act as a heat barrier coating, forms effective protection on the hanging part in the tin bath of the float glass, and has important practical significance in prolonging the service life of the hanging part in the tin bath of the float glass.

Description

technical field [0001] The invention belongs to the float glass tin bath hanger protection technology, and in particular relates to a technology for making the float glass tin bath hanger have high temperature corrosion resistance. Background technique [0002] In the production process of float glass, the float medium is extremely oxidized under the high temperature of the tin bath, which increases the loss of tin and causes various defects on the glass surface; therefore, it is necessary to pass protective gas nitrogen into the tin bath, and add 5 to 10% hydrogen gas forms a reducing atmosphere in the tin bath, reducing tin oxide to tin again. The supply of hydrogen often uses water electrolysis to produce high-purity hydrogen for use in tin baths. Hydrogen production by electrolysis of water has complex operation techniques; however, it has the advantages of less impurities, high purity, and no pollution. [0003] In order to solve this problem, a way of ammonia decompo...

AI Technical Summary

Problems solved by technology

[0011] Reaction (3) proceeds to the right, resulting in the oxidation protection layer Cr of the superalloy of the pendant substrate 2 o 3 easily corroded

Loss of protective film effect, such as figure 1 As shown, the harmful gas directly corrodes the base of the hanger more rapidly, which leads to the deterioration of the material performance of the base of the hanger, the life is greatly reduced, and the cost in the production of float glass is increased.

[0012] There is no related technology to solve the above problems

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