Steel plate passivation apparatus

Abstract

The invention provides a steel plate passivation device, which includes a steel plate unwinding device, a steel plate, a coating passivation device, a drying device and a steel plate winding device, and the coating passivation device includes passivation coating components, passivation solution buffer tank and passivation solution preparation tank, and corresponding flow control valves and circulating pumps are provided on the pipeline; the passivation coating component includes an upper coating component and a lower Coating assembly, the coating assembly includes a passivation solution chamber and a coating sponge fixed inside the passivation solution chamber and communicating with the chamber, the passivation solution chamber is divided into an outer chamber by a partition chamber and inner chamber, the partition is provided with an opening near the passivation liquid chamber, and the opening is provided with a hermetic door. The invention has good passivation coating effect, simple structure, low equipment cost and simple 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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