A kind of hot-dip galvanizing flux and method

A technology of plating flux and hot-dip galvanizing, which is applied in hot-dip plating process, coating, metal material coating process, etc., and can solve problems such as missed plating on the surface of test pieces

Active Publication Date: 2018-09-14
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the addition of aluminum, nickel, and rare earth in the plating solution, the phenomenon of missed plating on the surface of the tes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: a kind of plating flux formula of hot-dip galvanized zinc-aluminum-nickel rare earth alloy, every 500g deionized water adds following components:

[0027] ZnCl 2 : 80g

[0028] NH 4 Cl: 27g

[0029] Surfactant: 3 g cetyltrimethylammonium bromide (CTAB)

[0030] Silane coupling agent KH560: 7mL

[0031] Ethanol: 130mL

[0032] For the preparation of plating flux, each component takes the formula amount: take deionized water, add ethanol, place in a magnetic stirrer and stir evenly, the system temperature is 60°C during stirring; add 36% acetic acid dropwise to adjust the pH of the system at 3 Slowly add KH560 and hexadecyltrimethylammonium bromide between ~4, and continue to stir for 1~2 hours until a uniformly mixed solution is obtained. The system temperature is 60°C during stirring; all the chloride salts in the formula ( ZnCl 2 and NH 4 Cl) was added into the solution, and the stirring was continued for about 30 minutes to completely dissolve th...

Embodiment 2

[0040] Embodiment 2: a kind of plating flux formulation of hot-dip galvanized zinc-aluminum-nickel rare earth alloy, every 500g deionized water adds following components:

[0041] ZnCl 2 : 80g

[0042] NH 4 Cl: 40g

[0043] SnCl 2 2H 2 O: 32.5g

[0044] KCl: 15g

[0045] Surfactant: 3 g cetyltrimethylammonium bromide (CTAB)

[0046] Silane coupling agent KH560: 7mL

[0047] Ethanol: 120mL

[0048] The preparation of plating flux and the procedure of hot-dip plating process are the same as in Example 1.

Embodiment 3

[0049] Embodiment 3: a kind of plating flux formulation of hot-dip galvanized zinc-aluminum-nickel rare earth alloy, every 500g deionized water adds following components:

[0050] ZnCl 2 : 80g

[0051] NH 4 Cl: 53g

[0052] KCl: 15g

[0053] CaCl 2 : 19g

[0054] Surfactant: 3 g cetyltrimethylammonium bromide (CTAB)

[0055] Silane coupling agent KH560: 7mL

[0056] Ethanol: 140mL

[0057] The preparation of plating flux and the procedure of hot-dip plating process are the same as in Example 1.

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Abstract

The invention provides a hot dip galvanizing assistant and a hot dip galvanizing method. The assistant comprises compounded salts, 70-90 g of ZnCl2, 20-80 g of NH4Cl, 120-150 mL of anhydrous ethanol, 0.5-5 g of a carbon hydrogen surfactant, 2-10 mL of a silane coupling agent and 500 g of deionized water, the compounded salts are selected from SnCl2.2H2O, KCl, AlCl3.6H2O and other chlorine salts, and the use amount of every compounded salt is 10-40 g. The hot dip galvanizing assistant has good component stability, can effectively prevent plating leakage of the surface of a plated member and substantially improve the corrosion resistance of the plated member when used in plating assisting treatment, and allows the yield of the plated member obtained by using the hot dip galvanizing assistant to reach up to 98% or above.

Description

technical field [0001] The invention relates to a method for pretreatment of the surface of hot-dip galvanized steel, in particular to a formula of a plating flux for hot-dip galvanized zinc-aluminum-nickel rare earth alloy. Background technique [0002] Hot-dip galvanizing is one of the important methods to prevent steel corrosion at present. The traditional plating solution used for hot-dip galvanizing is generally pure zinc. During hot-dip galvanizing, fluxing is an extremely important process. Helping plating not only directly affects the quality of the coating, but also has a greater impact on the cost of zinc consumption. [0003] Adding an appropriate amount of aluminum, rare earth, and nickel alloys to the hot-dip galvanizing zinc solution can significantly improve the surface quality and corrosion resistance of the coating. However, with the addition of aluminum, nickel, and rare earth in the plating solution, the phenomenon of missed plating on the surface of the ...

Claims

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Application Information

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IPC IPC(8): C23C2/02C23C2/06
CPCC23C2/02C23C2/06
Inventor 刘胜林郭茂文郑雪萍刘超刘春荣张唯玮李自军康佳
Owner CHANGAN UNIV
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