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A kind of hot-dip galvanized steel and its manufacturing method

A manufacturing method, hot-dip coating technology, applied in the direction of hot-dip coating process, coating, metal material coating process, etc., can solve the problems of weak cathodic protection and inability to meet the protective effect of aluminum plates, so as to avoid flow line defects, Effect of Optimizing Hot Dip Plating Process and Improving Cathodic Protection Capability

Active Publication Date: 2018-08-21
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current pure zinc coating and Zn-Al-Mg coating have a good cathodic protection effect on steel, but the cathodic protection effect on the contact position between steel and aluminum plate is weak, which cannot meet the protection effect on aluminum plate

Method used

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  • A kind of hot-dip galvanized steel and its manufacturing method
  • A kind of hot-dip galvanized steel and its manufacturing method
  • A kind of hot-dip galvanized steel and its manufacturing method

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Embodiment Construction

[0046] The embodiment of the present application provides a hot-dip galvanized steel and its manufacturing method, which suppresses the formation of flow lines in the hot-dip galvanized steel coating, adds alloy elements to improve the cathodic protection capability, and obtains excellent cathodic protection performance for aluminum plates and a good coating. The appearance is hot-dip galvanized steel, and the corrosion resistance has also been improved to a certain extent.

[0047] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0048] The hot-dipped steel according to the present embodiment is obtained by forming a Zn-Al-Mg alloy coating on the surface of a steel base. Examples of steel substrates include various members such as steel plates, steel wires, steel pipes, and the like. The plating lay...

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Abstract

The invention provides hot dipping steel and a manufacturing method thereof. The hot dipping steel comprises a steel substrate and a zinc-aluminum-magnesium coating formed on the steel substrate. The zinc-aluminum-magnesium coating comprises, by the total weight of the coating, 1%-4% of Mg, 1%-4% of Al, 0.01%-0.1% of Ca and / or Ba, 0.1%-0.4% of Li, 0.1%-10% by volume of Zn-Mg phase and / or Zn-Mg-Al phase. According the hot dipping steel and the manufacturing method thereof, in order to avoid coating flow lines and blackening defects, a small number of other alloy elements are added to a plating bath, so that cathode protection ability is improved, and the hot dipping process is optimized. Therefore, the hot dipping steel which has good cathode protection performance for an aluminum plate and a good coating appearance is obtained, and the corrosion resistance is improved to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of hot-dip galvanizing, and in particular relates to a hot-dip galvanized steel and a manufacturing method thereof. Background technique [0002] The galvanizing method that inhibits iron corrosion by cathodic means has excellent anti-corrosion effect and economic feasibility, and thus is widely used in the preparation of steel materials with good anti-corrosion properties. In particular, hot-dip galvanized steel, which is plated by dipping the steel material into molten zinc, has a simpler manufacturing process and lower product prices than electro-galvanized steel, and therefore, hot-dip galvanized steel is used in many There is an increasing demand in various industries such as the automobile industry, the electrical industry and the construction industry. [0003] Galvanized steel has cathodic protection properties. Since zinc has a lower redox potential than iron, when galvanized steel is exposed to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/06
CPCC23C2/06
Inventor 蒋光锐滕华湘王海全刘李斌刘广会李翔宇李研李学涛
Owner SHOUGANG CORPORATION
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