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Method for performing hot-dip co-permeation on aluminum alloys

A technology of aluminum alloy and hot-dip aluminum plating, applied in hot-dip plating process, metal material coating process, coating, etc., can solve the problem of poor bonding between the galvanized layer and the aluminized layer, affecting the corrosion resistance of the aluminized layer, Oxidation holes inside and outside the coating, etc., to achieve the effect of improving corrosion resistance, improving product quality, and better resistance to hydrogen embrittlement

Active Publication Date: 2018-07-13
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods have problems of varying degrees: in the patent 45 steel surface aluminizing process, the high-temperature diffusion coating is prone to produce internal and external oxidation holes, and even form hole bands and cracks, which will bring considerable difficulties to subsequent processing. At the same time, it affects the corrosion resistance of the aluminized layer
When the plating effect is not good and missing plating occurs, it is very easy to cause serious differences in the thickness of the coating in the subsequent diffusion; in the patented steel composite hot dip coating method, the alloy layer in the coating is thin, and the combination of the galvanized layer and the aluminum layer is poor. Easy to peel off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 1.5mm thick X80 steel, first soak in 12% NaOH solution at 70°C for 10 minutes to remove oil, wash in water for 1 minute, soak in 15% HCl solution at room temperature for 5 minutes to remove rust, wash in water for 1 minute, then soak in acetone for 3 minutes, and finally at temperature Dry in a vacuum oven at 100°C for 10 min. Then put the steel parts into the flux composition: K 2 ZrF 6 : 30g / L; AlF: 8g / L; HF: 6g / L; KCl: 20g / L; KF: 10g / L, the prepared aqueous solution is used for electroplating treatment, the electroplating temperature is 90°C, and the electroplating time: 5min, After taking it out, dry it in a vacuum oven at 100°C for 10 minutes. Dip the aided steel workpiece into the molten pool of Al-1% Cu alloy according to the mass ratio for immersion plating, the temperature is 690°C, and the time is 20 seconds. Take out the hot-dip galvanized steel workpiece and cool it down to normal temperature naturally. At the same time, when taking out the steel she...

Embodiment 2

[0022] Take 1 mm thick X65 steel, first soak in 15% NaOH solution at 80°C for 8 minutes to remove oil, wash in water for 1 minute, soak in 20% HCl solution at room temperature for 4 minutes to remove rust, wash in water for 1 minute, then soak in acetone for 3 minutes, and finally at temperature Dry in a vacuum oven at 100°C for 10 min. Then put the steel parts into the flux composition: K 2 ZrF 6 : 30g / L; AlF: 8g / L; HF: 6g / L; KCl: 20g / L; KF: 10g / L, the prepared aqueous solution is used for electroplating treatment, the electroplating temperature is 90°C, and the electroplating time: 5min, After taking it out, dry it in a vacuum oven at 100°C for 10 minutes. Dip the aided steel workpiece into the molten pool of Al-1% Cu alloy according to the mass ratio for immersion plating, the temperature is 690°C, and the time is 20 seconds. Take out the hot-dip galvanized steel workpiece and cool it down to normal temperature naturally. At the same time, when taking out the steel sheet...

Embodiment 3

[0025] 1.5 mm thick No. 45 steel, first soak in 20% NaOH solution at 80°C for 5 minutes to remove oil, wash in water for 1 minute, soak in 25% HCl solution at room temperature for 3 minutes to remove rust, wash in water for 1 minute, then soak in acetone for 3 minutes, and finally in Dry in a vacuum oven at 100°C for 10 minutes. Then put the steel parts into the flux composition: K 2 ZrF 6 : 30g / L; AlF: 8g / L; HF: 6g / L; KCl: 20g / L; KF: 10g / L, the prepared aqueous solution is used for electroplating treatment, the electroplating temperature is 90℃, and the electroplating time: 5min, After taking it out, dry it in a vacuum oven at 100°C for 10 minutes. Dip the aided steel workpiece into the molten pool of Al-1% Cu alloy according to the mass ratio for immersion plating, the temperature is 690° C., and the time is 30 seconds. Take out the hot-dip galvanized steel workpiece and cool it down to normal temperature naturally. At the same time, when taking out the steel sheet, ensur...

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Abstract

The invention discloses a method for performing hot-dip co-permeation on aluminum alloys, and belongs to the field of hot-dip co-permeation of aluminum alloys. The method comprises the following mainsteps: performing oil removal and derusting on a surface of a steel part; performing assistant plating on the surface; performing hot-dip plating on aluminum and performing protection of inert gas anddiffusion co-permeation on the aluminum alloys. The method for performing hot-dip co-permeation on the aluminum alloys is combined with processes of hot dipping, aluminum permeation and diffusion aswell as protection of the inert gas, together with a coordinate corrosion-resistant action of multi-element, so that the quality of a product is improved, a plating layer is difficult to drop off, andholes of a permeating layer are reduced, so that a diffusion annealing temperature is reduced, original mechanical performance of steel can be effectively protected, and energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of hot-dip co-infiltration aluminum alloys, and in particular relates to a method for hot-dip co-infiltration aluminum alloys. Background technique [0002] Steel has good mechanical properties and low price, so it is widely used in industrial fields such as machinery, transportation, chemical industry, petroleum, construction, etc. However, steel is easily corroded and causes huge economic losses. In order to improve the corrosion resistance of steel and reduce the economic loss caused by corrosion, it is necessary to carry out anti-corrosion treatment on the steel surface. Hot-dip aluminum plating is one of the most widely used surface anti-corrosion technologies. It refers to immersing the surface-treated steel or workpiece in molten aluminum and keeping it for a certain period of time, so that the aluminum penetrates into the steel matrix and covers the steel surface. A process for obtaining a hot-dip aluminum co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C23C2/02C23C2/28
CPCC23C2/02C23C2/12C23C2/28
Inventor 彭浩平沈圣哲苏旭平王建华吴长军刘亚
Owner CHANGZHOU UNIV
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