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White-smoke-free promotion flux for steel fastener hot dip galvanizing and application process of white-smoke-free promotion flux

A technology of fasteners and plating flux, applied in hot-dip galvanizing process, metal material coating process, coating, etc., can solve the problems of unretrieved and inapplicable hot-dip galvanizing of steel fasteners, etc., and achieve The effect of reducing the thickness of the alloy layer, reducing pollution, and a wide range of sources

Pending Publication Date: 2018-06-22
WENZHOU XINDE ELECTRIC FITTINGS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Up to now, in the existing hot-dip galvanizing production of steel fasteners, ammonium chloride is contained in the plating flux, and no literature has been retrieved for hot-dip galvanizing of fasteners without using ammonium chloride as a flux component.
At the same time, whether or not the formulation of the flux containing ammonium chloride is used in the hot-dip galvanized production of steel structural parts instead of steel fasteners, and the appearance of steel fasteners is similar to that of steel. Compared with structural parts, it is more complicated. Therefore, the flux and its process used in steel structural parts are not suitable for the production of hot-dip galvanized steel fasteners.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1. a kind of steel fastener hot-dip galvanizing agent without white smoke, comprises the following components:

[0043] Zinc chloride 150g / L, magnesium chloride 30g / L, nickel chloride 10g / L, hydrochloric acid 10g / L, hexamethyltetramine 2.5g / L, plating additive 10g / L, and the rest is water;

[0044] The plating flux additive is a mixture of PSA-96 acetylene glycol surfactant and emulsifier OP-10 (alkylphenol polyoxyethylene ether), and the weight ratio of the two is 2:1. Wherein the acetylenic diol surfactant adopts the product of Tianjin Saifei Chemical Technology Development Co., Ltd.; the density of hydrochloric acid used is 1.14g / cm 3 , The PH value of the flux is 2.8.

Embodiment 2

[0045] Embodiment 2. a kind of steel fastener hot-dip galvanizing agent without white smoke, comprises the following components:

[0046] Zinc chloride 110g / L, magnesium chloride 40g / L, nickel chloride 13g / L, hydrochloric acid 8.0g / L, hexamethyltetramine 3.5g / L, plating flux additive 8g / L, and the rest is water;

[0047] The plating flux additive is a PSA-96 type acetylene glycol surfactant and an emulsifier OP-10 in a weight ratio of 1:1. Among them, the acetylenic diol surfactant is the product of Tianjin Saifei Chemical Technology Development Co., Ltd. The specific gravity of hydrochloric acid used is 1.14g / cm 3 , The PH value of the flux is 2.8.

Embodiment 3

[0048] Embodiment 3. a kind of steel fastener hot-dip galvanizing agent without white smoke, comprises the following components:

[0049] Zinc chloride 200g / L, magnesium chloride 10g / L, nickel chloride 8.0g / L, hydrochloric acid 12g / L, hexamethyltetramine 2.0g / L, plating flux additive 9.0g / L, and the rest is water;

[0050] The plating flux additive is PSA-96 type acetylenic glycol surfactant and emulsifier OP-10 in a weight ratio of 1.5:1. Among them, the acetylenic diol surfactant adopts the product of Tianjin Saifei Chemical Technology Development Co., Ltd.; the specific gravity of hydrochloric acid used is 1.14g / cm 3 .

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PUM

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Abstract

The invention relates to the technical field of steel fastener hot dip galvanizing, in particular to white-smoke-free promotion flux for steel fastener hot dip galvanizing and an application process of the white-smoke-free promotion flux. The white-smoke-free promotion flux for steel fastener hot dip galvanizing comprises the following components: 100-200g / L of zinc chloride, 10-40g / L of magnesiumchloride, 8.0-13g / L of nickel chloride, 6.0-12g / L of hydrochloric acid, 2.0-3.5g / L of hexamethylenetetramine, 2.0-10g / L of a flux additive, and the balance of water. The application process of the white-smoke-free promotion flux comprises steps of degreasing, water cleaning, rust-removing, secondary water cleaning, promotion flux adhering, drying, galvanizing and the like. The white-smoke-free promotion flux for steel fastener hot dip galvanizing disclosed by the invention does not contain ammonium chloride which generates white smoke while encountering molten metal zinc, and can greatly reduce generation of soot during hot-dip galvanizing of the steel fastener; and a hot-dip galvanizing process which uses the promotion flux is more optimized, and has the advantages of being low in production cost, stable in plating assistance quality, capable of producing steel fasteners for hot dip galvanizing on a large scale, and the like.

Description

technical field [0001] The invention relates to the technical field of hot-dip galvanizing of steel fasteners, in particular to a smoke-free plating aid for hot-dip galvanizing of steel fasteners and an application process thereof. Background technique [0002] Hot-dip galvanizing (Hot-dip galvanizing) is a surface corrosion protection method commonly used for steel fasteners. It uses the low melting point of metal zinc to adhere to the characteristics of high melting point steel surface, and adopts the anti-corrosion treatment method. The steel fasteners described in the present invention are usually screws and nuts, which also include various anti-theft and anti-disassembly special-shaped screws and nuts; the main purpose of hot-dip galvanizing steel fasteners is to improve their corrosion resistance Performance, widely used in various fields of the national economy such as the communication power industry, power transmission line towers and so on. Hot-dip galvanizing of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/02C23C2/06
CPCC23C2/02C23C2/06
Inventor 苗立贤王正寅李孝礼
Owner WENZHOU XINDE ELECTRIC FITTINGS
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