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Zinc bismuth multicomponent alloy used for hot dip galvanizing of steel and iron members and hot dip galvanizing method therefor

A technology of steel components and multi-element alloys, applied in hot-dip galvanizing process, metal material coating process, coating, etc., can solve problems such as poor melt fluidity, zinc flow, and many burrs, and achieve the effect of improving fluidity

Active Publication Date: 2005-08-17
株洲冶炼集团有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Another object of the present invention is to provide a new hot-dip galvanizing method, which uses a zinc-bismuth multi-element alloy as a zinc bath to solve the problems of poor melt fluidity, zinc flow, zinc nodules, and many burrs in hot-dip galvanizing. , poor surface finish of the coating, etc.

Method used

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  • Zinc bismuth multicomponent alloy used for hot dip galvanizing of steel and iron members and hot dip galvanizing method therefor
  • Zinc bismuth multicomponent alloy used for hot dip galvanizing of steel and iron members and hot dip galvanizing method therefor

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Embodiment 1

[0058] A bismuth-containing zinc-bismuth multi-element alloy A for galvanizing hot-dip iron and steel components, the composition of which is 0.05% (wt) Bi; 0.09% (wt) Al; 0.01% (wt) rare earth metal RE; 0.05 % (wt) of Ni; the rest is zinc and unavoidable impurities, and the rare earth metal RE is a mixture of lanthanum (La): cerium (Ce) = 1:1.

Embodiment 2

[0060] A bismuth-containing zinc-bismuth multi-element alloy A for galvanizing hot-dip iron and steel components, the composition of which is 0.1% (wt) Bi; 0.09% (wt) Al; 0.01% (wt) rare earth metal RE; 0.05 % (wt) Ni; the rest is zinc and unavoidable impurities, and the rare earth metal RE is a mixture of lanthanum (La): cerium (Ce): praseodymium (Pr)=2:2:1.

Embodiment 3

[0062] A bismuth-containing zinc-bismuth multi-element alloy A for galvanizing hot-dip iron and steel components, the composition of which is 0.05% (wt) Bi; 0.05% (wt) Al; 0.05% (wt) rare earth metal RE; 0.05 % (wt) Ni; the rest is zinc and unavoidable impurities, and the rare earth metal RE is a mixture of lanthanum (La): cerium (Ce)=1:1.

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Abstract

The present invention relates to zinc alloy and its zinc hot immersion plating process. The technological scheme has Zn-Bi alloy for hot immersion plating iron and steel member consists of: Bi 0.05-0.1 wt%, Al 0.05-0.09 wt%, RE 0.01-0.05 wt% and Ni 0-0.05 wt% except Zn and inevitable impurity, with RE being mixture of at least two of La, Ce and Pr. The zinc hot immersion planting of steel product containing Si and / or P is completed in zinc bath with the said Zn-Bi alloy. The present invention has reasonably controlled Al, Ni and RE contents in the alloy and Bi added into the alloy, so that the zinc bath has obviously improved flowability, resulting in appropriately reduced plating thickness while ensuring the anticorrosive performance and mechanical strength of the plating.

Description

technical field [0001] The invention relates to a zinc alloy for galvanizing steel components under heated conditions. Background technique [0002] At present, the zinc bath used in the hot-dip galvanizing industry at home and abroad has basically been improved from a pure zinc bath to a zinc alloy bath. The corrosion resistance, surface quality, and bonding force of the coating obtained by the latter have made great progress. Various zinc alloy baths have the problems of poor melt fluidity, zinc flow, zinc nodules, many burrs, and poor surface finish of the coating. Although various improved alloys have solved some of these problems to a certain extent, there are still defects, such as Zn-Al alloys are very effective in improving the brightness of the coating, but the melt segregation is large and the zinc bath is sticky; Zn-Al- Rare earth metal RE alloys can improve the wettability of steel and zinc very well, but the composition fluctuates greatly and the element burns ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/00C23C2/00
Inventor 匡立春刘朗明覃虹张伟王全
Owner 株洲冶炼集团有限责任公司
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