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Hot galvanizing method capable of obtaining grass green coating on profile steel

A grass-green, hot-dip galvanizing technology, applied in metal material coating process, coating, hot-dip plating process, etc., can solve the problems of difficult to obtain grass-green coating, high color temperature range requirements, uneven color of color coating, etc. To achieve the effect of easy control of process parameters, wide process window and excellent surface finish

Active Publication Date: 2019-10-15
四川电力设计咨询有限责任公司 +1
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  • Claims
  • Application Information

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Problems solved by technology

[0010] Although the color hot-dip galvanizing technology has the characteristics of simple process, short production cycle, low cost, and good corrosion resistance of the obtained coating, but because the obtained colored coating is not easy to control, and the existing color hot-dip galvanizing process only stays in the thin A few kinds of color coatings such as yellow, blue, purple, etc. are obtained on the steel plate, and the temperature range for obtaining the color is high, and the processability is poor. Color coating yield is low
Among them, the process parameter window of grass green is extremely narrow, and it is difficult to obtain a uniform and single grass green coating
The temperature of the grass green coating obtained in the previous research is higher than 560°C, and the immersion temperature is too high, which greatly accelerates the loss of the zinc solution, and the grass green range is extremely narrow within this temperature, and the obtained grass green The uniformity is low, and there are other messy colors, which have a great impact on the decorative effect of the coating
[0011] In addition, all the current color hot-dip galvanizing technologies have only been tested on steel plates. The color coatings obtained are uneven in color and prone to variegated colors, and have not been applied to section steel materials (such as angle steel, channel steel, and I-beam) etc.) for color hot-dip galvanizing, and there is no process parameter to provide guidance for the color hot-dip galvanizing process of section steel

Method used

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  • Hot galvanizing method capable of obtaining grass green coating on profile steel
  • Hot galvanizing method capable of obtaining grass green coating on profile steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The color hot-dip galvanizing process is carried out on the angle steel with a thickness of 1mm. The size of the angle steel is L40×70mm. First, a special color hot-dip galvanizing bath is prepared, and then the surface of the plated parts is pretreated, and finally the hot-dip galvanizing operation is performed. The specific operation steps are as follows :

[0067] Step 1, prepare the plating solution

[0068] (1) After melting the zinc ingot, add the pre-prepared master alloy.

[0069] (2) Make the ratio of elements in the zinc solution meet the Zn content of 98.8%, the Mn content of 1%, the Y content of 0.1%, the Ce content of 0.05%, and the Cu content of 0.05%.

[0070] Step 2, surface pretreatment of plated parts

[0071] (1) Soak the plated parts in 50°C and 6wt.% NaOH solution for 30 minutes to carry out alkaline cleaning and degreasing, take them out after soaking, and wash them with clean water.

[0072] (2) Soak the plated piece in 15% hydrochloric acid so...

Embodiment 2

[0088] The color hot-dip galvanizing process is carried out on the angle steel with a thickness of 10mm. The size of the angle steel is L45×50mm. First, a special color hot-dip galvanizing bath is prepared, and the surface of the plated part is pretreated, and finally the hot-dip galvanizing operation is carried out. The specific operation steps are as follows :

[0089] Step 1, prepare the plating solution

[0090] (1) After melting the zinc ingot, add the pre-prepared master alloy.

[0091] (2) Make the ratio of elements in the zinc solution meet the Zn content of 99.4%, the Mn content of 0.5%, the Y content of 0.05%, the Ce content of 0%, and the Cu content of 0.05%.

[0092] Step 2, surface pretreatment of plated parts

[0093] (1) Soak the plated parts in 70°C and 6wt.% NaOH solution for 30 minutes to carry out alkaline cleaning and degreasing, take them out after soaking, and wash them with clean water.

[0094] (2) Soak the plated piece in 20% hydrochloric acid solut...

Embodiment 3

[0109] The color hot-dip galvanizing process is carried out on the angle steel with a thickness of 20mm. The size of the angle steel is L100×100mm. First, a special color hot-dip galvanizing bath is prepared, and the surface of the plated part is pretreated, and finally the hot-dip galvanizing operation is carried out. The specific operation steps are as follows:

[0110] Step 1, prepare the plating solution

[0111] (1) After melting the zinc ingot, add the pre-prepared master alloy.

[0112] (2) Make the ratio of elements in the zinc solution meet the Zn content of 99.85%, the Mn content of 0.1%, the Y content of 0%, the Ce content of 0.04%, and the Cu content of 0.01%.

[0113] Step 2, surface pretreatment of plated parts

[0114] (1) Soak the plated parts in 60°C and 6wt.% NaOH solution for 30 minutes to carry out alkaline cleaning and degreasing, take them out after soaking, and wash them with clean water.

[0115] (2) Soak the plated piece in 18% hydrochloric acid solu...

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Abstract

The invention relates to a hot galvanizing method capable of obtaining a grass green coating on profile steel, and belongs to the technical field of material surface treatment. The hot galvanizing method capable of obtaining the grass green coating on profile steel comprises the following steps that the profile steel is immersed into a plating solution with the temperature of T+ / -5 DEG C, 1 to 10min of immersion plating is carried out, the profile steel is taken out, air cooling of 1 to 10 min is carried out, water cooling to the room temperature is carried out, and the grass green coating isobtained, wherein T=445.65+101*0.832<d>, d is the thickness of the profile steel, and the unit is mm; and the plating solution comprises, by weight percent, 0.1 to 1% of Mn, 0 to 0.1% of Y, 0 to 0.08% of Ce, 0.01 to 0.05% of Cu and the balance Zn, and the sum of the weight percents of Y and Ce is smaller than or equal to 0.15%. The color hot galvanizing technology is adopted, the process is simple, the process parameters are easily controlled, a single-color coating with the uniform grass green can be obtained, and the yield is quite high.

Description

technical field [0001] The invention relates to a hot-dip galvanizing method for obtaining a grass-green coating on section steel, and belongs to the technical field of material surface treatment. Background technique [0002] Hot-dip galvanizing is the most widely used and most economical and effective steel anticorrosion measure in the world. Involving electric power construction, transportation, home appliances and furniture and other industries, due to the diversity of its application fields, the protective properties such as corrosion resistance and weather resistance of the galvanized layer and good decoration are the focus of people's attention and research. [0003] Existing steel coloring technologies mainly include color paint coating, color passivation technology, etc., and the most widely used steel coloring technology in industry is color paint coating technology. The color paint coating technology is mainly applied to steel strips and steel plates. For some st...

Claims

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Application Information

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IPC IPC(8): C23C2/06C22C18/00C23C2/02
CPCC22C18/00C23C2/02C23C2/06
Inventor 孙珍茂詹宗东任德顺赵庆斌乐启炽赵大志胡成路郭瑞臻程春龙
Owner 四川电力设计咨询有限责任公司
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