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Low-zinc hot-dip-coating aluminum alloy coating material achieving alteration by chrome coordination compound

A chromium complex, hot-dip plating technology, applied in the field of low-zinc hot-dip aluminum alloy coating materials, can solve problems such as steel plate pin leakage, coating scratches, forming processing, welding and coating performance gaps, etc. The effect of saving material, reducing the thickness of the coating and improving the quality of the coating

Inactive Publication Date: 2013-06-05
贵州铝厂有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to provide a low-zinc hot-dip aluminum alloy coating material modified by chromium complexes, so as to solve: the zinc-aluminum coating material is easy to produce steel plate needle-shaped missing plating, and the coating layer is damaged by scratches and cuts. Insufficient cathodic protection capability, and there are gaps in forming, welding and coating performance compared with pure zinc coating, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Select a group of elements according to the formula combination table, according to the weight percentage, for example: chromium complex Cr(CO) 6 : 3.25, the rare earth additive is Pr: 0.7, Si: 1.0, the second solvent element Zn: 30, the balance is Al;

[0020] The total amount of the alloy prepared is 1000kg, and the weight of each substance required is calculated as:

[0021] Cr(CO) 6 :32.5Kg, rare earth additives Pr: 7 Kg, Si: 10Kg, Zn: 300Kg, Al: 650.5Kg.

Embodiment 2

[0022] Example 2: Select a group of elements according to the formula combination table, according to the weight percentage example: chromium complex Cr(CO) 6 : 3.25, Eu: 0.7, Si: 1.0 as the rare earth additive, Zn: 30 as the second solvent element, and the balance is Al;

[0023] The total amount of the alloy prepared is 1000kg, and the weight of each substance required is calculated as:

[0024] Cr(CO) 6 :32.5Kg, rare earth additive Eu: 7 Kg, Si: 10Kg, Zn: 300Kg, Al: 650.5Kg.

[0025] In both Examples 1 and 2, according to the conventional preparation method of coating materials, the aluminum ingot or molten aluminum was first added to the smelting furnace, heated to completely melt and kept at 700-800°C;

[0026] Then add chromium complex Cr(CO) according to the formula ratio 6、 Rare earth additives, Si and other modifiers, add zinc at the end and stir evenly; on-site sampling and analysis, adjust the addition amount according to the analysis results and formula range; then continue...

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PUM

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Abstract

The invention discloses low-zinc hot-dip-coating aluminum alloy coating material achieving alteration by chrome coordination compound. The low-zinc hot-dip-coating aluminum alloy coating material achieving the alteration by chrome coordination compound comprises, by weight, 3.25% of chrome coordination compound Cr (CO) 6, 30% of Zn, 1.0% of Si, 0.7% of tombarthite additives, and balanced Al and unavoidable trace impurities. The low-zinc hot-dip-coating aluminum alloy coating material achieving the alteration by chrome coordination compound solves the problems that steel plate needle-shaped coating leakage can occur to zinc-aluminum coating material and a coating layer can not effectively protect cathodes of a scratch and a notch and also achieves the performances, such as forming machining, welding and coating, of the zinc-aluminum coating material.

Description

Technical field [0001] The invention relates to an aluminum alloy coating material, in particular to a low-zinc hot-dip aluminum alloy coating material modified by a chromium complex. Background technique [0002] In order to solve the anti-corrosion problem of steel, hot-dip galvanizing process is commonly used for protection of galvanized or galvanized aluminum materials. Due to the shortage of zinc resources, the comprehensive cost is high. Therefore, more and more zinc-aluminum coating materials are used. Aluminum material is added in the aluminum alloy. Since Al has much higher chemical activity than Zn, it preferentially reacts with Fe-Al based on iron, which changes the Fe-Zn reaction mechanism and the structure of its products, and it is easy to produce needle-like plating leakage and coating cross-cutting. Insufficient cathodic protection of wounds and incisions, and gaps in forming processing, welding and coating performance with pure zinc coatings, which offset many ad...

Claims

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Application Information

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IPC IPC(8): C23C2/12C22C21/10
Inventor 门三泉车云曹跃清
Owner 贵州铝厂有限责任公司
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