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Plating solution for continuous hot dipping of steel strips and dipping method thereof

A technology of hot-dip plating and plating solution, applied in hot-dip plating process, coating, metal material coating process, etc., can solve the problems of poor mechanical properties, poor wettability, and prone to missing plating, etc., and achieve improved corrosion resistance Effect

Inactive Publication Date: 2015-04-08
CHINA IRON & STEEL RES INST GRP +1
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  • Abstract
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  • Claims
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Problems solved by technology

However, the coating solution of this coating has poor wettability to the steel substrate, and defects such as missing plating are prone to occur during the galvanizing process, and the production cost of the steel strip is high and the mechanical properties are poor.

Method used

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  • Plating solution for continuous hot dipping of steel strips and dipping method thereof
  • Plating solution for continuous hot dipping of steel strips and dipping method thereof
  • Plating solution for continuous hot dipping of steel strips and dipping method thereof

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Embodiment Construction

[0017] In the present invention, unless otherwise specified, the percentages used are all percentages by mass. It should be noted that operations that are not described in detail in the present invention are all prior art in the art, and will not be repeated here.

[0018] The plating solution for continuous hot-dipping steel strip of the present invention comprises: Al: 0.5-5 mass %, Mg: 1-4 mass %, the balance is Zn and unavoidable impurity, wherein, the content of Al and Mg satisfies The following conditions: (Al+Mg) is 1.5-9% by mass, (Al+Mg) / Mg is 1.70-2.30.

[0019] Using the above-mentioned plating solution, the corrosion resistance of the plating layer can be improved jointly through the joint action of Al and Mg. The ratio of Al and Mg content in the plating solution also has a significant impact on the quality of the coating. The structure of zinc-aluminum-magnesium alloy coating is mainly composed of: Zn-rich phase, Al-rich phase, binary eutectic phase, Zn-Al-MgZn...

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Abstract

The invention relates to plating solution for continuous hot dipping of steel strips and a dipping method thereof. The plating solution for continuous hot dipping of steel strips disclosed by the invention comprises 0.5-5wt% of Al, 1-4wt% of Mg, and the balance of Zn and inevitable impurities, wherein the contents of Al and Mg meet the following conditions: (Al+Mg) / Mg is 1.70-2.30. The plating solution for continuous hot dipping of steel strips and the dipping method thereof provided by the invention are suitable for the hot dipping of different varieties of steel strips, and moreover, the corrosion resistance of the zinc-based alloy plating layers prepared by virtue of the plating solution can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of steel strip hot-dip plating and zinc-based alloys, and in particular relates to a plating solution and a dip-plating method for continuous hot-dip plating of steel strips. Background technique [0002] In the field of steel strip hot-dip plating, because zinc has excellent corrosion resistance, electrical and thermal conductivity and is easy to process, especially as a sacrificial anode, it can protect the steel base, thus greatly extending the service life of the steel strip. Hot-dip galvanizing is the most widely used steel surface treatment method with the best cost performance in the world today. [0003] Reduction continuous hot-dip galvanizing is the main production method of steel strip production today. With the gradual deepening of hot-dip galvanizing research, people have also begun to explore whether adding other trace elements can improve the corrosion resistance of steel strip coating. In th...

Claims

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Application Information

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IPC IPC(8): C23C2/06C23C2/40
CPCC23C2/06C23C2/40
Inventor 张启富江社明岳崇锋刘昕张杰李远鹏刘秋元罗丹王贺贺陈斌锴
Owner CHINA IRON & STEEL RES INST GRP
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