High-strength multi-element zinc base alloy coated steel wire for bridge cable, and hot-dipping technology thereof

An alloy coating, high-strength technology, applied in hot-dip plating process, metal material coating process, coating, etc., can solve the problem that the anti-corrosion life cannot meet the relevant requirements, and achieve good salt spray corrosion resistance and high strength , good toughness

Active Publication Date: 2018-10-26
JIANGSU FASTEN STEEL CABLE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for bridges built in oceanic areas, their anti-corrosion life still cannot meet the relevant requirements

Method used

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  • High-strength multi-element zinc base alloy coated steel wire for bridge cable, and hot-dipping technology thereof
  • High-strength multi-element zinc base alloy coated steel wire for bridge cable, and hot-dipping technology thereof
  • High-strength multi-element zinc base alloy coated steel wire for bridge cable, and hot-dipping technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A hot-dip process for high-strength multi-component zinc-based alloy-coated steel wire for bridge cables, the process: (sodium hydroxide + sodium carbonate + sodium phosphate) compound alkaline solution alkaline cleaning to remove oil → lead bath → water rinse → hydrochloric acid + corrosion inhibitor (Sulfuric acid) compound pickling and derusting → rinse with water → (ammonium chloride + zinc chloride) plating aid → drying → rapid hot-dip zinc-based alloy melt (trace alloys such as aluminum, nickel and rare earth elements, etc.) → nitrogen + electromagnetic Composite wiping to remove zinc → cooling → hot-dip galvanized aluminum alloy melt (aluminum content 9%-12%)—nitrogen wiping—cooling—take-up.

[0040] The specific process is

[0041] Alkali cleaning: the lye prepared by sodium hydroxide and alkaline salt is used to emulsify, soften and dissolve the oily impurities on the surface of the smooth steel wire. The alkaline salt is selected from sodium carbonate + sodium...

Embodiment 2

[0052] A hot-dip process for high-strength multi-element zinc-based alloy coated steel wire for bridge cables, process flow: see Example 1.

[0053] The specific process is

[0054] Alkali cleaning, lead bath, pickling, and plating aid are all referring to embodiment 1;

[0055] Hot-dip zinc-based micro-alloy melt: quickly immerse the steel wire treated with the flux into the zinc-based micro-alloy melt pool containing trace alloys, the main chemical composition is Zn-Al-Ni; the content of Al is 0.02wt% , the content of Ni is 0.25wt%;

[0056] Electromagnetic wiping + nitrogen wiping to remove zinc: see Example 1;

[0057] Hot-dip Zn-Al multi-element alloy: quickly immerse the wiped steel wire into the zinc-aluminum-based microalloy melt pool containing trace alloys, the main chemical composition is Zn-Al multi-element alloy melt, and the Al content in the melt is 12%, the content of La is 0.02wt%, the content of Mg is 0.2wt%;

[0058] Nitrogen swab: See Example 1.

[005...

Embodiment 3

[0062] A hot-dip process for high-strength multi-element zinc-based alloy coated steel wire for bridge cables, process flow: see Example 1.

[0063] The specific process is

[0064] Alkali cleaning, lead bath, pickling, and plating aid are all referring to embodiment 1;

[0065] Hot-dip zinc-based microalloy melt: quickly immerse the steel wire treated with plating flux into the zinc-based microalloy melt pool containing trace alloys, the main chemical composition is Zn-Al-Ni; the content of Al is 0.01wt% , the content of Ni is 0.18wt%;

[0066] Electromagnetic wiping + nitrogen wiping to remove zinc: see Example 1;

[0067] Hot-dip Zn-Al multi-element alloy: quickly immerse the wiped steel wire into the zinc-aluminum-based microalloy melt pool containing trace alloys, the main chemical composition is Zn-Al multi-element alloy melt, and the Al content in the melt is 10%, the content of Cs is 0.05wt%;

[0068] Nitrogen swab: See Example 1.

[0069] The addition of Al and N...

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Abstract

The invention relates to a high-strength multi-element zinc base alloy coated steel wire for a bridge cable. The steel wire is characterized in that hypereutectoid steel wire rods with the carbon content of 0.82% above are drawn to form bright steel wires with the strength of 2000 MPa above, and then the bright steel wires are hot-galvanized to form hot-galvanized aluminum alloy steel wires; the coating comprises Zn-Al alloy, and one or more of trace rare earth, trace nickel elements and magnesium elements are added selectively. The hot-dipping technology comprises two steps of hot dipping ofzinc base alloy solutions and hot galvanizing of aluminum alloy solutions, and one or more of the trace rare earth, the trace nickel elements and trace aluminum elements are added to the hot-dip zincbase alloy solutions. According to the steel wire, the thickness of the hot-dip zinc base alloy solution coating can be reduced obviously, and the adhesion strength of the coating and the appearance quality are improved; and the strength, toughness and corrosion resistance of the steel wire coated with the hot-galvanizing aluminum alloy solutions are all improved obviously.

Description

technical field [0001] The invention belongs to the hot-dip process of bridge cable steel wire, and more specifically relates to the design of the hot-dip process of zinc-based alloy coated steel wire. Background technique [0002] In the bridge cable industry, corrosion is the main factor affecting the life of bridge cables. Galvanized steel wire is the most widely used bridge cable material before this century, and has certain anti-corrosion performance. The anti-corrosion performance of this coating comes from the sacrificial anode protection of zinc. However, in different environments, the service life of hot-dip galvanized coatings is very different. There are many reasons for this. The main reason is that the corrosion products generated in different environments are different. In industrial atmospheres high in sulfide, the corrosion products are bathable zinc sulfate salts, which are washed off the surface by rainwater. However, in the rural atmospheric environment,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/38C22C18/04
CPCC22C18/04C23C2/06C23C2/38
Inventor 赵军薛花娟朱晓雄王志刚夏浩城陈建峰
Owner JIANGSU FASTEN STEEL CABLE CO LTD
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