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Alloy-plated steel material having excellent corrosion resistance and high surface quality, and method for manufacturing same

A technology of surface quality and corrosion resistance, applied in the field of alloyed steel, which can solve the problems of air pollution and deterioration of the corrosive environment.

Inactive Publication Date: 2019-08-06
POHANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, air pollution and deterioration of the corrosive environment due to industrial sophistication are increasing, and due to strict regulations on resources and energy conservation, it is necessary to develop steel materials with better corrosion resistance than existing galvanized steel materials.

Method used

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  • Alloy-plated steel material having excellent corrosion resistance and high surface quality, and method for manufacturing same
  • Alloy-plated steel material having excellent corrosion resistance and high surface quality, and method for manufacturing same
  • Alloy-plated steel material having excellent corrosion resistance and high surface quality, and method for manufacturing same

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Embodiment Construction

[0054] Hereinafter, examples of the present invention will be described in detail. The following examples are only for understanding the present invention, and do not limit the present invention.

[0055] (Example)

[0056] As shown in Table 1 below, a cold-rolled base iron test piece having a thickness of 0.5 to 2.3 mm was dipped in a Zn plating bath containing Mg: 0.5 to 2.0%, and Al: 0.5 to 2.5%. The amount of coating is adjusted to 35-100g / m on one side 2 . The plating deposition amount is adjusted by injecting gas from a gas nozzle to apply pressure to the surface.

[0057] In addition, at the position of 30 cm above the nozzle for controlling the amount of coating, the vertical line of the base iron is used as a reference, within 30° of the upper part and 80° of the lower part, and the cooling nozzle is used at a rate of 420 to 7800 m per hour. 3 flow jet for cooling. In Table 1 below, the angle of the cooling gas is indicated by a positive (+) sign when it is in th...

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Abstract

The present invention relates to an alloy-plated steel material that can be used in home appliances, automobiles, and construction materials and the like and, more particularly, to an alloy-plated steel material having excellent corrosion resistance and high surface quality.

Description

technical field [0001] The present invention relates to an alloy-plated steel material that can be used for home appliances, automobiles, building materials, etc., and more specifically, relates to an alloy-plated steel material excellent in corrosion resistance and surface quality. Background technique [0002] The galvanizing method, which suppresses the corrosion of iron by cathodic corrosion protection, has excellent corrosion protection performance and economic efficiency, and thus is widely used in the manufacture of steel materials with high corrosion resistance characteristics. In particular, compared with electro-galvanized steel, hot-dip galvanized steel, in which steel is dipped in molten zinc to form a coating, has a simpler manufacturing process and lower product prices, so demand is increasing in all industries, including automobiles, home appliances, and building materials . [0003] When the zinc-coated hot-dip galvanized steel is exposed to a corrosive envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/40C23C2/26C23C2/02C22C18/00C22C18/04
CPCC22C18/00C22C18/04C23C2/02C23C2/06C23C2/40C23C2/20C23C2/261C23C2/29C23C2/26C23C2/0222C22C38/00B32B15/013B32B15/18C23C30/005Y10T428/12951Y10T428/12993B32B15/043C23C30/00B32B15/01Y10T428/12972B32B15/04Y10T428/12799
Inventor 孙一领金钟常金泰喆金正国
Owner POHANG IRON & STEEL CO LTD