Hot dip galvanizing method for steel pieces

A technology for hot-dip galvanizing and steel, applied in hot-dip galvanizing process, coating, metal material coating process, etc., can solve the problems such as the scheme for improving the process conditions of aluminum-zinc-based plating solution, etc.

Active Publication Date: 2007-12-26
南京大吉铁塔制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] But there is no plan for further improvement of aluminum-zinc-based

Method used

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Experimental program
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Embodiment Construction

[0015] The embodiment of proportioning of the present invention all has good effect:

[0016] 1 2 3 4 5 6 7 8 9 10 11 12

[0017] Aluminum: 7% 8% 7% 9% 8% 8% 9% 7% 7% 9% 7% 9%

[0018] Nickel: 3% 3% 4% 6% 3% 5% 6% 3% 5% 6% 3% 4%

[0019] Silicon: 0.5% 0.5% 0.7% 0.5% 0.6% 0.7% 0.5% 0.8% 0.7% 0.5% 0.8% 0.5%

[0020] Rare earth: 1.0% 0.8% 1% 1% 0.8% 0.8% 0.8% 1.0% 0.8% 1% 0.8% 1%

[0021] Scandium: 0.5% 0.8% 1.0%

[0022] Zinc: Balance:

[0023] Above-mentioned alloy proportion of the present invention (except zinc) is made into alloy piece (every piece about 5 kilograms) by above-mentioned proportion and adds in the alloy and zinc liquid (by the proportioning of the present invention) after melting zinc.

[0024] The basic process of hot-dip galvanizing is: black parts inspection, material hanging, degreasing, rinsing, pickling, rinsing, flux treatment, hot air drying, hot-dip galvanizing, cooling, including unloading, quality inspection, etc. .

[0025] Black parts...

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Abstract

This invention discloses a method for hot-dip galvanizing on steel work piece. The method comprises: checking black work piece, suspending, degreasing, rinsing, washing with acid, rinsing, treating with a galvanizing aid, drying with hot air, hot-dip galvanizing and cooling. During the hot-dip galvanizing process, Al, Ni, Si and rare earth element are added into the galvanizing solution. The galvanizing solution comprises: Al 7-9 wt. %, Ni 3-6 wt. %, Si 0.5-0.8 wt. %, rare earth element 0.5-1.0 wt. %, and Zn as balance. The addition of Si can reduce Fe content in the galvanizing solution, and the formation of Zn-Fe alloy residue. The Zn consumption is lowered by nearly 1%, and the surface quality of galvanized steel is improved.

Description

technical field [0001] The invention relates to a hot-dip galvanizing method in the field of metallurgy, in particular to a hot-dip galvanizing method for iron and steel pieces. Background technique [0002] The anti-corrosion coating of steel products mainly includes different coating systems such as electro-galvanizing, hot-dip galvanizing, aluminum, zinc-aluminum alloy, etc., and the anti-corrosion coating is coated on the surface of steel parts to protect the base metal. The hot-dip galvanizing (including galvanizing) method of steel parts has been a conventional and commonly used method: it is mainly used to plate components of bridges, power communication equipment, petroleum metallurgy and other equipment. However, the corrosion of the coating is increasing day by day, and the anti-corrosion ability and service life of the single metal coating, especially the zinc coating, cannot meet the material protection requirements. For zinc-aluminum alloys or aluminum-zinc all...

Claims

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Application Information

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IPC IPC(8): C23C2/06
Inventor 王永柱王春阳于忠秀马倩王立新高文元
Owner 南京大吉铁塔制造有限公司
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