Steel plate passivation apparatus

Abstract

The invention provides a steel plate passivation apparatus. The apparatus comprises a steel plate releasing device, a steel plate, a coating passivation device, a drying device and a steel plate rolling device, the coating passivation device comprises a passivation coating assembly, a passivation solution buffer box and a passivation solution preparing box which are sequentially connected by a pipeline, and a flow-controllable valve and a circulation pump are correspondingly arranged on the pipeline; and the passivation coating assembly includes an upper coating assembly and a lower coating assembly which are oppositely arranged and structurally similar, each of the upper and lower coating assemblies includes a passivation solution chamber and coating sponge fixedly arranged at the inner sides of the passivation solution chambers and communicating with the chambers, every passivation solution chamber is divided into an outer chamber and an inner chamber by a separator plate, an openingis arranged at a position, close to the corresponding passivation solution chamber, of the separator plate, and the opening is provided with a sealing door. The steel plate passivation apparatus hasthe advantages of good passivation coating effect, simple structure, low device cost, and simplicity in maintenance.

Description

technical field [0001] The invention relates to a galvanized steel plate passivation equipment, in particular to a steel plate passivation equipment. Background technique [0002] Passivation is a method to transform the metal surface into a state that is not easily oxidized, thereby delaying the corrosion rate of the metal. After the steel plate is galvanized, its corrosion resistance is greatly improved, but it still cannot meet the needs of long-term use in a humid environment. To improve the durability of galvanized sheet, surface passivation treatment is also required. [0003] The most common passivation processes are spray and roller coating. Both the spray method and the roller coating method have unsatisfactory effects in application, especially when used for thicker galvanized sheets, color difference or yellow edge defects often occur. At the same time, the spraying method often has uneven spraying in practical applications, and the pollution caused by the spra...

AI Technical Summary

Problems solved by technology

Both the spray method and the roller coating method have unsatisfactory effects in the application, especially when used for thicker galvanized sheets, color difference or yellow edge defects often occur

At the same time, the spraying method often has uneven spraying in practical applications, and the pollution caused by the spraying process is relatively large, which is not environmentally friendly; while the roller coating method is often used on thick plates, the edge and side cannot be coated. , and the roller coating equipment is expensive, the process requires high precision, the maintenance is not easy, and the production cost is high

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