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Method for coloration hot dip galvanization of hollow steel

A hot-dip galvanizing and coloring technology, applied in hot-dip galvanizing process, metal material coating process, coating, etc.

Active Publication Date: 2019-10-15
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Aiming at the problems of the current hollow steel surface coloring technology, the present invention provides a method for color hot-dip galvanizing on hollow steel. Main process parameters such as temperature, immersion rate, immersion angle, extraction rate, extraction angle, etc., combined with surface pretreatment, dipping operation and cooling treatment methods, finally obtain a colored coating with good coating performance and strong decoration on the hollow steel surface

Method used

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  • Method for coloration hot dip galvanization of hollow steel
  • Method for coloration hot dip galvanization of hollow steel
  • Method for coloration hot dip galvanization of hollow steel

Examples

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Effect test

Embodiment 1

[0104] For the method of color hot-dip galvanizing of round pipe steel with a wall thickness of 0.5mm, the process flow diagram is shown in Figure 4 . Among them, the size of the round pipe steel is DN20×0.5×100mm. Firstly, Zn-Mn master alloy, Zn-Y master alloy and Zn-Ce master alloy are prepared, and then the prepared master alloy is used to prepare special color hot-dip galvanized Liquid, pre-treat the surface of the plated parts, and finally carry out hot-dip galvanizing operation, the specific operation steps are as follows:

[0105] Step 1, prepare Zn-Mn master alloy, Zn-Y master alloy, Zn-Ce master alloy

[0106] (1) First place the zinc ingot in the smelting equipment and heat it to 540°C with the furnace. After the zinc ingot is completely melted, a zinc liquid is obtained; add Mn to the zinc liquid and control the temperature at 540°C. When the Mn is completely melted in In the zinc liquid, fully stir, keep warm for 10min, cast in the mold, obtain Zn-Mn (5.2wt.%Mn)...

Embodiment 2

[0126] A method for color hot-dip galvanizing of round pipe steel with a wall thickness of 5mm, wherein the size of the round pipe steel is DN50×5×100mm, firstly, Zn-Mn master alloy, Zn-Y master alloy, Zn-Ce master alloy are prepared , and then use the prepared master alloy to prepare a special colored hot-dip galvanizing bath, pretreat the surface of the plated parts, and finally perform a hot-dip galvanizing operation. The specific operation steps are as follows:

[0127] Step 1, prepare Zn-Mn master alloy, Zn-Y master alloy, Zn-Ce master alloy

[0128] (1) First place the zinc ingot in the smelting equipment and heat it to 550°C with the furnace. After the zinc ingot is completely melted, a zinc liquid is obtained; add Mn to the zinc liquid and control the temperature at 550°C. When the Mn is completely melted in In the zinc liquid, fully stir, keep warm for 15min, cast in the mold, obtain Zn-Mn (5.1wt.%Mn) intermediate alloy;

[0129] (2) First place the zinc ingot in the...

Embodiment 3

[0148] A method for performing color hot-dip galvanizing on a square tube steel with a wall thickness of 10mm, wherein the size specification of the square tube steel is 80×60×10×100mm. First, prepare Zn-Mn master alloy, Zn-Y master alloy, Zn-Ce master alloy, and then use the prepared master alloy to prepare special colored hot-dip galvanizing bath, pretreat the surface of the plated parts, and finally carry out Hot-dip plating operation, the specific operation steps are as follows:

[0149] Step 1, prepare Zn-Mn master alloy, Zn-Y master alloy, Zn-Ce master alloy

[0150] (1) First place the zinc ingot in the smelting equipment and heat it to 555°C with the furnace. After the zinc ingot is completely melted, a zinc liquid is obtained; add Mn to the zinc liquid and control the temperature at 555°C. When the Mn is completely melted in In the zinc liquid, fully stir, keep warm for 20min, cast in the mould, obtain Zn-Mn (4.9wt.%Mn) intermediate alloy;

[0151] (2) First place t...

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Abstract

The invention discloses a method for coloration hot dip galvanization of hollow steel and belongs to the technical field of steel surface treatment. The method comprises the following steps: firstly,preparing a zinc alloy plating solution (98.8 to 99.85 percent of Zn, 0.1 to 1 percent of Mn, 0 to 0.1 percent of Y, 0 to 0.08 percent of Ce and 0 to 0.05 percent of Cu); immersing hollow steel (suchas round tubes and square tubes) plated parts with pretreated surfaces into the zinc alloy plating solution by an angle of 10 to 15 degrees between the plated parts and the zinc alloy plating solutionat the rate of 0.002 to 0.015 m / s and the immersion plating temperature of 430 to 550 DEG C for 0.5 to 10 minutes; and secondly, extracting the plated parts from the zinc alloy plating solution by anangle of 10 to 15 degrees between the plated parts and the zinc alloy plating solution at the rate of 0.002 to 0.015 m / s, carrying out idle stop for 1 to 10 minutes and then carrying out water cooling to finally obtain coatings with various colors such as yellow, purple, blue, grass green and sandstone color and the advantages of uniform single colors, good surface smoothness and no mixed color.The process has the characteristics of simplicity, easiness in control, high manufacturability, low cost and the like, and thereby has a broad industrial popularization prospect.

Description

technical field [0001] The invention belongs to the technical field of steel surface treatment, and in particular relates to a method for carrying out color hot-dip galvanizing on hollow steel. Background technique [0002] Hot-dip galvanizing is currently the most widely used and most economical and effective anti-corrosion measure for steel in the world. It involves many industries such as electric power construction, transportation, and home appliances and furniture. Due to the diversity of its application fields, the corrosion resistance of the galvanized layer Protective properties such as weather resistance and good decoration are the focus of people's attention and research. [0003] Existing steel coloring technologies mainly include color coating technology, color passivation technology, etc. Color coating technology is the most widely used in industry for steel coloring technology, which should be applied to steel strips and steel plates. The color coating of stee...

Claims

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Application Information

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IPC IPC(8): C23C2/06C23C2/38C23C2/02C22C18/00C22C1/02
CPCC22C1/02C22C18/00C23C2/02C23C2/06C23C2/38
Inventor 乐启炽胡成路赵大志郭瑞臻宁少晨王航
Owner NORTHEASTERN UNIV
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