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A kind of fluxing agent for hot-dip galvanized aluminum-magnesium alloy or zinc-aluminum-magnesium rare earth alloy

An aluminum-magnesium alloy, hot-dip galvanizing technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problem of reducing the service life of the crucible, the application range of the fluxing agent is small, and it cannot be scaled up. promotion and other issues, to achieve the effect of extending the service life and promoting the application potential

Active Publication Date: 2019-07-12
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After the original environmental protection flux is assisted, the temperature of hot-dip galvanized aluminum-magnesium alloy is higher than that of hot-dip galvanizing (445°C-455°C), which will easily cause the crucible to burst due to high temperature, which reduces the service life of the crucible and cannot be greatly improved. Scale up for practical application
Moreover, the application range of the original plating flux is small, and different alloys require different plating fluxes, which also causes some inconvenience in the promotion of practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Hot-dip Zn-5Al-1Mg alloy, the flux composition is CuCl 2 5%, ZnCl 2 40%, CeCl 3 4%, KF2%, H 2 o 2 5%, alcohol 2%, and the rest water.

[0034] After the 30mm×30mm steel plate has been pretreated by alkali cleaning to remove oil and pickling and rust removal, it is immersed in the fluxing agent in a water bath at 80°C for 45 seconds. °C oven for drying. Perform hot-dip plating in 455°C alloy liquid for 60 seconds, shake off excess alloy liquid, and then cool naturally at room temperature. Hot-dip plating means that there is no smoke generation, no missing plating on the surface of the steel plate, the coating is smooth, brighter, and has better adhesion. The coating thickness is 105-120μm.

Embodiment 2

[0036] Hot-dip Zn-5Al-1.5Mg alloy, the flux composition is: CuCl 2 5%, ZnCl 2 40%, CeCl 3 5%, KF3%, H 2 o 2 5%, alcohol 2%, and the rest water.

[0037] After the 30mm×30mm steel plate has been pretreated by alkali cleaning to remove oil and pickling and rust removal, it is immersed in the fluxing agent in a water bath at 80°C for 45 seconds. °C oven for drying. Perform hot-dip plating in 450°C alloy liquid for 60 seconds, shake off excess alloy liquid, and cool naturally at room temperature. Hot-dip galvanizing means that there is no smoke generation, no missing plating on the surface of the steel plate, the coating is relatively smooth, the surface is bright, and the adhesion is good. The thickness of the coating is 98-110μm.

Embodiment 3

[0039] Hot-dip Zn-5Al-2Mg alloy, the flux composition is: CuCl 2 8%, ZnCl 2 30%, CeCl 3 5%, KF4%, H 2 o 2 4%, alcohol 2%, and the rest water.

[0040]After the 30mm×30mm steel plate has been pretreated by alkali cleaning to remove oil and pickling and rust removal, it is immersed in the fluxing agent in a water bath at 80°C for 45 seconds. °C oven for drying. Perform hot-dip plating in 450°C alloy liquid for 60 seconds, shake off excess alloy liquid, and cool naturally at room temperature. Hot-dip galvanizing means that there is no smoke generation, no missed plating on the surface of the steel plate, the coating is relatively smooth, the surface is bright, and the adhesion is good. The thickness of the coating is 90-103 μm.

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PUM

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Abstract

The invention discloses a plating adjuvant for hot dipping of zinc-aluminum-magnesium alloy or zinc-aluminum-magnesium rare earth alloy. The plating adjuvant is prepared from the following components in mass percent: 5 to 10% of CuCl2, 20 to 40% of ZnCl2, 4 to 8% of CeCl3, 2 to 6% of KF, 3 to 5% of H2O2, 2 to 5% of alcohol and the balance of water. When a steel plate plated by the plating adjuvant is in hot dipping, less zinc residues are generated, and the phenomenon of skip plating generated when a conventional plating adjuvant is used for plating can also be avoided, so that a coating which has the advantages of moderate thickness, good adhesion and smooth surface and has a good protective effect on a substrate is obtained. The plating adjuvant can be suitable for various different kinds of alloy, the plating adjuvant with a good effect can be obtained only by properly adjusting the proportion of the components, and the plating adjuvant has great popularization and application potentials.

Description

technical field [0001] The invention belongs to the field of hot-dip galvanizing on the surface of steel materials, and in particular relates to a plating flux for hot-dip galvanized aluminum-magnesium alloy or zinc-aluminum-magnesium rare earth alloy. [0002] technical background [0003] The galvanized layer can not only protect the substrate physically but also provide electrochemical cathodic protection, and can significantly improve the corrosion resistance of steel materials. It is one of the commonly used technologies for steel corrosion protection. Pretreatment of steel with flux before hot-dip galvanizing is a necessary process for hot-dip galvanizing. The effect of plating aid directly determines the uniformity and quality of the coating, which in turn affects the protective effect of the coating on the substrate. [0004] The process flow of hot-dip plating is: alkaline cleaning and degreasing → water washing → pickling and rust removal → water washing → dipping ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/06C23C2/02
CPCC23C2/02C23C2/06
Inventor 张振岳李辛庚武臻王晓明岳增武闫风杰樊志彬郭凯李文静吴亚平傅敏
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY