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Plating solution for hot-dip galvanizing, aluminum and magnesium on surface of steel and plating method using plating solution

A hot-dip galvanizing and steel technology, applied in hot-dip galvanizing process, metal material coating process, coating, etc., can solve the problems of reducing the strength of steel wire, affecting the use, and deteriorating corrosion resistance

Active Publication Date: 2021-09-14
天津市新宇彩板有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Hot-dip galvanized aluminum treatment for steel wires for packaging can provide steel wires with long-lasting metallic luster. While ensuring aesthetics, it can avoid corrosion of steel wires in humid environments during storage, and corrosion pitting will affect the steel wires. The strength of the thread affects its use in packaging and fixing
However, the steel wire will be bent and wound repeatedly during use, especially in the process of repeated use, which will increase the number of times of bending and winding. Repeated bending and winding will increase the chance of cracks on the surface of the steel wire and its coating. risk, the occurrence of cracks will reduce the service strength of the steel wire, and the cracks on the coating will lead to the deterioration of corrosion resistance, which creates new requirements for the steel wire and its coating. The present invention is based on this background. Adjust the galvanized aluminum process and the composition of the plating solution to meet the use of steel wires under repeated bending conditions

Method used

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  • Plating solution for hot-dip galvanizing, aluminum and magnesium on surface of steel and plating method using plating solution
  • Plating solution for hot-dip galvanizing, aluminum and magnesium on surface of steel and plating method using plating solution
  • Plating solution for hot-dip galvanizing, aluminum and magnesium on surface of steel and plating method using plating solution

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Bath atomic percentage of each element Al: 20%, Mg: 0.8%, Si: 3%, Ti: 1%, B: 2.2%, Ce: 0.45%, the balance being Zn.

[0022] Coating preparation process comprises the steps of: preparing an alloy ingot obtained preform ratio of each element in accordance with the content of the bath. Prefabricated sufficiently melted alloy ingot, a zinc pot zinc was incubated stand 510 ℃. Selection of packaging steel wire, steel wire elemental composition by weight percent: C: 0.10-0.40%, Si: 0.1-0.3%, Mn: 1.0-2.0%, P≤0.025%, S≤0.015% and Al: 0.015- 0.1%, Ti: 0.11-0.16%, Nb: 0.1-0.13% and V: 0.2-0.25%, the balance being iron (Fe) and unavoidable impurities. Cold rolled steel wire prepared, drawn to a diameter of 3mm. Steel wire degreasing, brushing, rinsing, drying process. Purpose is to remove the plate surface residual grease, stains. Steel wire heated, cooled, and 350 deg.] C incubation, into the zinc pot, dip time 5min, the protective gas atmosphere furnace volume percentage of H 2 / N ...

Embodiment 2-12

[0025] In various embodiments, the bath composition in Table 1 and Table 3, in Example 1 was prepared DETAILED embodiment, only the adjustment of the bath composition. Example corrosion resistance test and bending test results in Table 2 and Table 4 for each embodiment.

[0026] Examples 1-6 using the bath composition of the present application, does not significantly red rust after 2000h salt spray test, repeated bending of the visible surface of the coating cracks was not observed. Example 6 is not employed preferably Ti, B atomic ratio range, the coating surface appears red rust after 2000h portion hours of salt spray testing, 5cm bend radius of 10 times the rear surface cracks were observed. Example 7 Al atomic ratio ranges reduction, in Examples 8-9 to change the range of the atomic ratio of Si, not added in Example 10 rare earth Ce, embodiments bath Ti, reducing the addition amount of B 11-12, wherein Example 7, 11 the corrosion resistance decreased to different degrees, cra...

Embodiment 13

[0036] The percentage of each element of the plating solution is Al: 20%, Mg: 0.8%, Si: 3%, Ti: 1%, B: 2.2%, CE: 0.45%, the margin is Zn. The preparation process of the plating includes the following steps: Pre-forming alloy ingots were prepared according to each element content ratio in the plating solution. The prefabricated alloy ingot is fully melted, and zinc liquid in zinc pot is maintained from 430-480 ° C for use. Packaging steel wire, the components of the steel wires are: 0.1-0.40%, Si: 0.1-0.3%, MN: 1.0-2.0%, P ≤ 0.025%, s ≤ 0.015% and Al: 0.015- 0.1%, Ti: 0.1-0.16%, NB: 0.1-0.13% and V: 0.2-0.25%, the rest is iron Fe and inevitable impurities. The steel wire is prepared by cold rolling, draws to 3 mm in diameter. Stermanement, brush, rinse, drying treatment of steel wires. The purpose is to remove the panel residual oil and stains. After the steel wire is heated, cooled and incubated 350 ° C, it enters zinc pot, dip plating time 50s, and the percentage of protective ga...

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Abstract

The invention provides a plating solution for hot-dip galvanizing, aluminum and magnesium on the surface of steel. The plating solution is used for relieving the risk of cracks on the surface of a plating layer of the steel under the working condition of repeated bending in the prior art. The plating solution comprises the following components of, in percentage by atom, 20%-25% of Al, 0.5%-1% of Mg, 2.3%-3.5% of Si, 1%-1.5% of Ti, 1.8%-3.2% of B, 0.3%-0.45% of Ce and the balance Zn and inevitable impurities. The corrosion resistance is improved by adding the alloy element Mg; in order to restrain the risk that the cracks appear on the surfaces of the steel and the plating layer of the steel due to repeated bending, a certain amount of Ti and B are added, so that the corrosion resistance is improved, and meanwhile, an intermediate phase is separated out at the grain boundary to restrain generation and expansion of the cracks; finally, the galvanized steel adopts a cooling mode of combining air cooling with water cooling to further refine grains, so that the corrosion resistance is improved, and the crack propagation inhibition performance is improved; and the service life of the zinc-plated aluminum-magnesium steel is prolonged by the final product.

Description

Technical field [0001] The present invention relates to surface treatment technology of metal material, particularly relates to a plating method for plating the surface of Al-Mg hot dip galvanized steel material and the use of the plating solution. Background technique [0002] Steel galvanized zinc coating having a good protective effect on iron and steel products. Zinc galvanized steel consumption accounted for more than 50% of zinc production. The method of galvanizing with a hot dip galvanized, electro galvanized, thermal spraying, vacuum deposition, plating and other mechanical rolling. Wherein all galvanized zinc galvanizing consumption amount 90% or more. Hot-dip galvanizing method is simple, the layer thickness of the zinc, corrosion resistance, low cost, thickness, toughness, the coating surface state can be controlled. The main process for the hot dip galvanizing: degreasing a caustic wash water a a a rust (immersion solvent fluxing) a drying a water-cooling a hot-dip z...

Claims

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Application Information

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IPC IPC(8): C23C2/06C22C18/04C22C38/02C22C38/04C22C38/06C22C38/14C22C38/12C23C2/38
CPCC23C2/06C22C18/04C22C38/02C22C38/04C22C38/06C22C38/14C22C38/12C23C2/38
Inventor 刘岳华杜宝新杜天宇赵利明
Owner 天津市新宇彩板有限公司
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