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Hot dip galvanizing method of steel structural members

A technology of hot-dip galvanizing and structural parts, applied in hot-dip galvanizing process, coating, metal material coating process, etc., which can solve the problems of lack of process steps, low product qualification rate, rough coating, etc.

Inactive Publication Date: 2012-02-29
BEIJING JJRS TECH DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the simplicity of the galvanizing process in the above background technology, the lack of necessary process steps, the lack of corresponding additives in the plating flux and the pure zinc solution, and the lack of regulations on the working conditions of each step in the entire galvanizing process, the plating of steel structural parts The effect of zinc is not good, the coating is rough, nodules, partial missing plating, the combination of steel base and coating is not strong, and the product qualification rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The hot-dip galvanizing method of the invention is applied to the corrugated guardrail beams of expressways.

[0050] The amount and volume of zinc in the zinc pot: 60 tons of zinc, with a volume of 6m*1.2m*1.5m and about 11 cubic meters.

[0051] The method of hot-dip galvanizing the highway guardrail beams is as follows:

[0052] 1) Pre-plating preparations: identify the platability of the guardrail beams, check the material grade, chemical composition, shape and structure, etc., and learn that the material of the guardrail beams is Q195, and the overall dimensions of the guardrail beams are: length 4320mm*width 315mm*height 85mm*board thickness 3mm, single piece weighs 50kg. Remove paint, dirt and adhesions on the surface of guardrail beams;

[0053] 2) Degreasing treatment: first prepare a degreasing solution, put the guardrail beam into the surface of 40g / L sodium hydroxide, 20g / L sodium carbonate, 8g / L trisodium phosphate, 4g / L sodium silicate, and 2g / L The deg...

Embodiment 2

[0066] The hot-dip galvanizing method of the present invention is applied to plumbing pipe fittings in the construction industry.

[0067] The amount and volume of zinc in the zinc pot: 60 tons of zinc, with a volume of 6m*1.2m*1.5m and about 11 cubic meters.

[0068] The method of hot-dip galvanizing the plumbing pipe fittings is as follows:

[0069] 1) Pre-plating preparation: identify the platability of the plumbing fittings, check the material grade, chemical composition, shape and structure, etc. The overall dimensions of the plumbing fittings are: length 2320mm*width 315mm*height 85mm, and the weight of a single piece is 50 kg. Remove paint, dirt and adhesions on the surface of plumbing pipe fittings;

[0070] 2) Degreasing treatment: first prepare a degreasing solution, put the plumbing fittings into 43g / L sodium hydroxide, 23g / L sodium carbonate, 8.5g / L trisodium phosphate, 4.5g / L sodium silicate, 2.5g Degreasing treatment is carried out in the degreasing liquid prep...

Embodiment 3

[0083] The hot-dip galvanizing method of the present invention is applied to another plumbing pipe fitting in the construction industry.

[0084] The amount and volume of zinc in the zinc pot: 60 tons of zinc, with a volume of 6m*1.2m*1.5m and about 11 cubic meters.

[0085] The method of hot-dip galvanizing the plumbing pipe fittings is as follows:

[0086] 1) Preparation before plating: certify the platability of the plumbing fittings, check the material grade, chemical composition, shape and structure, etc. The overall dimensions of the plumbing fittings are: length 2100mm*width 255mm*height 65mm, and the weight of a single piece is 40 kg. Remove paint, dirt and adhesions on the surface of plumbing pipe fittings;

[0087] 2) Degreasing treatment: first prepare a degreasing solution, put the plumbing fittings into 47g / L sodium hydroxide, 26g / L sodium carbonate, 9.3g / L trisodium phosphate, 4.8g / L sodium silicate, 3.3g Degreasing treatment is carried out in the degreasing li...

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Abstract

The invention relates to a hot dip galvanizing method of steel structural members, comprising the following steps of: 1) preparing before galvanization; 2) degreasing; 3) cleaning degreased raffinate; 4) pickling; 5) cleaning pickled raffinate; 6) activating a steel structural member matrix; 7) applying a plating-assistant solvent; 8) drying the moisture in the plating-assistant solvent; 9) hot dip galvanizing; 10) cooling in the air and removing residual zinc; 11) cooling in water; 12) drying the moisture; and 13) examining. The invention further provides the relative component formula of various treatment fluids used during the galvanizing process in the above method, and provides the most ideal working condition parameters in each step of the galvanizing process. Processed by the hot dip galvanizing technology, the steel structural members have advantages of excellent integrity of the coating, high bonding strength, flat and smooth appearance and high qualified rate of products.

Description

technical field [0001] The invention belongs to the technical field of metal anti-corrosion surface engineering, and in particular relates to a hot-dip galvanizing process for steel structural parts. Background technique [0002] At present, there is a traditional hot-dip galvanizing method for steel structural parts called the drying solvent method. It first decontaminates and derusts the surface of the steel structural parts, and then immerses the steel structural parts in the known fluxing solvent, so that the surface of the structural parts is completely dipped in the fluxing solvent, and then the steel structure Take out the parts, dry the surface moisture, then immerse the steel structural parts in the molten pure zinc solution, take them out after a certain period of time, and finally put the steel structural parts in water to cool, and the whole process of hot-dip galvanizing is over. Due to the simplicity of the galvanizing process in the above background technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/02
Inventor 许雷
Owner BEIJING JJRS TECH DEV
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