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Production method of thin steel strip hot galvanizing

A production method and heating technology, applied in hot-dip plating process, coating, metal material coating process, etc., can solve problems such as environmental pollution, physical hazards of operators, etc., and achieve no environmental pollution, bright color, good durability corrosive effect

Active Publication Date: 2013-12-04
江苏大力神科技股份有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] Galvanized coiled steel strip is a thin steel plate with a wide range of uses in industrial production. Generally, the acid galvanizing process is used to galvanize the surface of the coiled steel strip. The process includes uncoiling, pickling, water washing, acid galvanizing, water washing, and passivation. , washing, drying, winding and other processes. This process galvanizes the surface of the coil and strip steel, which can strengthen the anti-corrosion performance of the steel plate surface and meet the requirements of use. It will cause pollution to the environment and cause great harm to the health of operators. Although protective measures can be taken to reduce pollution and harm, they cannot fundamentally solve the problem

Method used

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Embodiment Construction

[0019] A production method for hot-dip galvanizing of thin steel strips, comprising the following steps: uncoiling, welding, chemical stripping, electrolysis, cleaning, air drying, annealing, galvanizing, air cooling, tension leveling, chemical coating and coiling.

[0020] 1. Uncoiling: Uncoil the 0.14-0.2mm cold-rolled steel strip from the uncoiling shaft, cut off the super thick part at the head and tail, and transport it to the automatic welding machine by a conveyor.

[0021] 2. Welding: Use an automatic welding machine to weld the tail of the previous roll and the head of the next roll together. Welding machine parameters: current 7500A-15000A, circulating water cooling, air pressure 2.5Mpa.

[0022] 3. Degreasing: Pass the cold-rolled steel strip through the degreasing tank: the temperature in the tank is 60°C, and the degreasing liquid is 3-5% industrial alkali for chemical degreasing.

[0023] 4. Electrolysis: The cold-rolled steel strip passes through the electrolyt...

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Abstract

The invention relates to a production method of thin steel strip hot galvanizing. The production method comprises the following steps of uncoiling, welding, chemical desorption, electrolysis, cleaning, air drying, annealing, galvanizing, air cooling, straightening, chemical coating and coiling. A steel strip subjected to galvanizing has good corrosion resistance and better machining performance, the plating layer is firm and uniform, the color is bright, the service life is long, the environment pollution is avoided, and the continuous large-scale production can be realized.

Description

technical field [0001] The invention relates to a pure zinc-coated steel plate used in the field of building materials, in particular to a production method for hot-dip galvanizing on the surface of a thin steel strip with a thickness of 0.14-0.2 mm. Background technique [0002] Galvanized coiled steel strip is a thin steel plate with a wide range of uses in industrial production. Generally, the acid galvanizing process is used to galvanize the surface of the coiled steel strip. The process includes uncoiling, pickling, water washing, acid galvanizing, water washing, and passivation. , washing, drying, winding and other processes. This process galvanizes the surface of the coil and strip steel, which can strengthen the anti-corrosion performance of the steel plate surface and meet the requirements of use. It will cause pollution to the environment and cause great harm to the health of operators. Although protective measures can be taken to reduce pollution and harm, they ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/40C23C2/06C23C2/16
Inventor 曹晓国刘国玉
Owner 江苏大力神科技股份有限公司
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