Anti-melting aluminum corrosion coating and preparation method thereof

Abstract

The invention discloses an anti-melting aluminum corrosion coating, which is characterized in that it comprises at least three layers of sub-coatings, which are respectively an alloy layer coated on the surface of a substrate, a ceramic layer coated on the surface of the alloy layer, and a coating A sealing layer on the surface of the ceramic layer. The anti-melting aluminum corrosion coating provided by the invention has high temperature wear resistance, anti-sticking aluminum and melting aluminum corrosion resistance, as well as greater bonding strength and excellent thermal shock resistance; and, the anti-melting aluminum corrosion coating The preparation method is easy to implement, the coating material is easy to obtain, and the production cost is reduced.

Description

technical field [0001] The invention relates to an anti-melting aluminum corrosion coating and a preparation method thereof. Background technique [0002] Hot-dip aluminum-silicon steel plate has good heat resistance, oxidation resistance and heat reflection performance. It can be used for a long time at 500°C, and can still reflect 80% of radiant energy at this temperature. Under the same lighting conditions, its surface temperature is higher than Stainless steel is as low as 90°C; and it can maintain excellent corrosion resistance in sulfur-containing industrial atmospheres, marine atmospheres and humid environments. Therefore, in the fields of automobile industry, construction industry, household appliances and new energy, hot-dip aluminum-silicon steel sheets have been widely used, such as automobile mufflers, exhaust pipes, engine heat shields, various heat exchangers and photovoltaic solar energy battery substrate, etc. [0003] The unit equipment for the production ...

AI Technical Summary

Problems solved by technology

However, there is a big difference between the two production conditions, and many problems will arise on the hot-dip aluminum-silicon production line: the aluminum liquid has poor plateability, and pinholes are prone to missing plating defects; the WC coating used for the hot-dip galvanized sink roll is The performance of the aluminum-silicon pot will be severely deteriorated, and it cannot adapt to the production conditions of aluminum-silicon plating; the temperature of the aluminum plating solution is high, around 680°C, and it is more corrosive to the components in the aluminum-silicon pot than hot-dip galvanizing; continuous The working temperature of the sinking roll on the aluminum-silicon plating production line is about 680°C. The aluminum and its oxides in the aluminum plating solution will adhere to the aluminum slag on the surface of the roll and corrode the molten aluminum to cause pits on the surface, which will affect the quality of the steel plate.

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