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Zinc-free ammonium hot-dip galvanizing smokeless flux

A technology of hot-dip galvanizing and fluxing agent, applied in hot-dip galvanizing process, coating, metal material coating process and other directions, can solve the problems of zinc liquid loss, leakage plating, large smoke, etc. Saving consumption and good plating effect

Active Publication Date: 2020-07-28
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some studies have disclosed some smokeless plating fluxes, but some of these smokeless fluxes still contain zinc chloride, which is easy to cause the loss of zinc solution, and is difficult to popularize and apply; although the other part does not contain zinc chloride, there are missing plating Or obvious defects such as large smoke, have not been practically applied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of non-zinc-ammonium hot-dip galvanizing smokeless plating flux composition is as follows: magnesium chloride 150g / L, calcium chloride 60g / L, sodium chloride 40g / L, cerium chloride 60g / L, Potassium fluoride 20g / L L, hydroxylamine hydrochloride 10g / L, sodium hydroxide 15g / L, sodium lauryl sulfate 5g / L, AEO-95g / L, and the balance is water. Stir the above components evenly to obtain the final flux. Heat to 70°C, put the cleaned malleable steel workpiece into the flux for 3 to 5 minutes, and then perform hot-dip galvanizing. There is no smoke during the galvanizing process, and 5% zinc ingot resource consumption can be saved.

Embodiment 2

[0025] A kind of zinc-ammonium-free hot-dip galvanizing smokeless plating flux composition is as follows: magnesium chloride 100g / L, calcium chloride 30g / L, sodium chloride 20g / L, cerium chloride 30g / L, potassium fluoride 10g / L L, hydroxylamine hydrochloride 7g / L, sodium hydroxide 10g / L, sodium dodecylsulfonate 5g / L, AEO-93g / L, and the balance is water. Stir the above components evenly to obtain the final flux. Heat to 60°C, put the cleaned low-alloy steel workpiece into the flux for 3 to 5 minutes, and then perform hot-dip galvanizing. There is no smoke during the galvanizing process, and 8% zinc ingot resource consumption can be saved.

Embodiment 3

[0027] A kind of non-zinc-ammonium hot-dip galvanizing smokeless plating flux composition is as follows: magnesium chloride 80g / L, calcium chloride 20g / L, sodium chloride 10g / L, cerium chloride 20g / L, Potassium fluoride 5g / L L, hydroxylamine hydrochloride 5g / L, sodium hydroxide 3g / L, sodium dodecylbenzenesulfonate 1g / L, OP-101g / L, and the balance is water. Stir the above components evenly to obtain the final flux. Heat to 50°C, put the cleaned ordinary carbon steel workpiece into the flux for 3 to 5 minutes, and then perform hot-dip galvanizing. There is no smoke during the galvanizing process, and 10% of zinc ingot resource consumption can be saved.

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Abstract

The invention discloses a no-zinc-ammonium hot-dip galvanizing smokeless promotion flux comprising 100-210 g / L of alkaline earth metal chloride, 10-40 g / L of alkali chloride, 20-60 g / L of cerium chloride, 5-20 g / L of alkali metal fluoride, 5-10 g / L of hydroxylamine hydrochloride, 0-30 g / L of alkali metal hydroxide, 1-10 g / L of anionic surfactant, 1-5 g / L of a nonionic surfactant, and the balance water. The technical formula does not contain zinc chloride and ammonium chloride, after the treatment of promotion flux, the hot-dip galvanizing process has no smoke volatilization, and the zinc ingotconsumption can be obviously reduced, and positive accelerations of improving the production environment and reducing the production cost are achieved.

Description

technical field [0001] The invention belongs to the technical field of metal surface pretreatment, and in particular relates to a zinc-ammonium-free hot-dip galvanizing smokeless plating flux. Background technique [0002] Hot-dip galvanizing has become the most widely used anti-corrosion technology for steel materials due to its mature technology and low cost. Before hot-dip galvanizing, in order to ensure the combination of iron and zinc, it is necessary to use plating flux to treat the surface of the plated parts. The main components of traditional flux are zinc chloride and ammonium chloride, which can further purify the plated parts and reduce the The surface tension between the parts and the zinc bath, while activating the plated parts, promotes the alloy reaction between iron and zinc. The effect of the flux directly affects the quality and cost of galvanizing. The activation and fluxing mechanism of ammonium chloride is realized through its decomposition products, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/02C23C2/06
CPCC23C2/02C23C2/06
Inventor 陈运法仉小猛魏连启叶树峰杜英超于博涂玉波
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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