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Galvanization method for steel plate

A steel plate and hot-dip galvanizing technology, applied in hot-dip galvanizing process, coating, metal material coating process, etc., can solve problems such as failure to pass control, failure to achieve better results, etc., reduce peeling and other phenomena, and reduce costs low, reducing the effect of formation

Inactive Publication Date: 2016-05-18
邵杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] film forming technology to improve the adhesion between the coating and the steel base, but it has not achieved good results.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] After the steel plate is pickled and annealed, it is hot-dip galvanized. It is characterized in that: during the hot-dip galvanizing operation, the temperature of the steel plate is 480°C when entering the galvanizing bath, the temperature of the galvanizing bath is 448°C, and the Fe content in the galvanizing bath is < 0.03%, Al content in the plating bath: 0.26%, unit speed: 100-110m / min, steel plate cooling rate 0-2%, high-span temperature: 246-258°C.

[0018] On the basis of the above examples, the steel plate is cooled by air, and the cooling rate is 1%.

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PUM

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Abstract

The invention discloses a galvanization method for a steel plate, belonging to the field of steel plate galvanization technology. The steel plate is subjected to pickling and annealing and then is subjected to hot galvanizing. The galvanization method is characterized in that during the operation process of hot galvanizing, the temperature of the steel plate is 480 DEG C when the steel plate is put in a plating bath; the plating bath temperature in a zinc pot is 450-460 DEG C; the content of Fe in the plating bath is smaller than 0.03%; the content of Al in the plating bath is 0.26%; the speed of a unit is 100-110 m / min; the cooling rate of the steel plate is 0-2%; and the height-spanning temperature is 246-258 DEG C. by adopting the hot galvanizing technology conditions disclosed by the invention, an Fe-Al intermediate transition layer between the steel plate substrate and a galvanization layer can prevent mutual diffusion between Fe and Zn; the forming of an Fe-Zn alloy layer is reduced; the adhesiveness of the plating layer of the hot galvanized steel plate is improved; the phenomena of falling off, stripping and the like of plating layer zinc powder are reduced; the grain orientation of the plating layer of the hot galvanized steel plate is optimized by adopting the hot galvanizing technology conditions disclosed by the invention; and the scratching-resistance, the abrasion-resistance and the adhesiveness of the plating layer are obviously improved.

Description

technical field [0001] The invention provides a steel plate galvanizing method, which belongs to the field of steel plate galvanizing technology. Background technique [0002] Due to its good corrosion resistance, excellent coating performance and clean appearance, hot-dip galvanized steel sheets are used in household appliances [0003] It has been widely used in manufacturing industries such as appliances and automobile body panels. The requirements for the coating of the hot-dip steel plate are the coating and the substrate [0004] It has strong adhesion and will not fall off when it is stamped and deformed. In addition, it must have good welding performance, corrosion resistance and phosphating performance to ensure [0005] The adhesion of the protective paint film and the corrosion resistance after painting. However, the hot-dip galvanized steel sheet has problems in the actual stamping process. [0006] Problems such as powdering and peeling of the coating cause ...

Claims

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Application Information

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IPC IPC(8): C23C2/40C23C2/06
Inventor 邵杰
Owner 邵杰