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Activation solution used before Mg-Zn alloy plating and manufacturing method

A production method and alloy technology, applied in the field of surface treatment, can solve the problems of environmental protection requirements, corrosion of active substrates, damage to human health, etc., and achieve the effects of large oil pollution load, strong degreasing ability, and prevention of re-adsorption.

Inactive Publication Date: 2019-05-21
戴峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the common inorganic degreasers on the market contain a large amount of strong alkali sodium hydroxide, and some also contain highly toxic sodium cyanide, which will corrode the active substrate
During use, it usually needs to be heated to a higher temperature to play a role. At this time, the volatilized alkali mist will seriously damage human health and pollute the environment.
In addition, the surfactants in the additives are usually high-foaming surfactants, which will generate a lot of foam during use, and the waste water is difficult to treat, so the application is greatly restricted, especially the restriction of environmental protection requirements

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0012] A magnesium-zinc alloy pre-plating activation solution and its preparation method, the composition of the degreasing treatment solution is composed of the following components in weight percentage: sodium sulfite 8%, sodium hypochlorite 5%, dodecyl dimethyl amine oxide 4% , ammonium chloride 7%, sulfur trioxide 4%, bentonite 7%, lime 2%, lauryl amidopropyl betaine 3%, lauric acid diethanolamide 1.5%, and the balance is water.

Embodiment 2

[0014] A magnesium-zinc alloy pre-plating activation solution and its production method, the degreasing treatment solution consists of the following components in weight percentage: 10% sodium sulfite, 3% sodium hypochlorite, 6% dodecyl dimethyl amine oxide , ammonium chloride 5%, sulfur trioxide 6%, bentonite 5%, lime 3%, lauryl amidopropyl betaine 1%, lauric acid diethanolamide 2.5%, and the balance is water.

Embodiment 3

[0016] A magnesium-zinc alloy pre-plating activation solution and its production method, the composition of the degreasing treatment solution is composed of the following components in weight percentage: 8.5% sodium sulfite, 4.5% sodium hypochlorite, 4.5% dodecyl dimethyl amine oxide , sodium hydroxide 6.5%, sulfur trioxide 4.5%, bentonite 6.5%, lime 2.3%, lauryl amidopropyl betaine 2.5%, lauric acid diethanolamide 1.8%, and the balance is water.

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PUM

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Abstract

The invention discloses an activation solution used before Mg-Zn alloy plating and a manufacturing method. Oil removal treating fluid comprises following components including, by weight percent, 8 to10% of sodium sulfite, 3 to 5% of sodium hypochlorite, 4 to 6% of N,N-dimethyldodecylamine-N-oxid, 5 to 7% of ammonium chloride, 4 to 6% of sulfur trioxide, 5 to 7% of bentonite, 2 to 3% of lime, 1 to3% of lauramidopropyl betaine, 1.5 to 2.5% of lauroyl diethanolamide and the balance water.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a magnesium-zinc alloy pre-plating activation solution and a preparation method. Background technique [0002] Almost 90% of die-casting magnesium-zinc alloys are Zn-Si-based binary Zn-Si alloys and multi-component Zn-Si alloys containing a small amount of Cu, Mg, Ni and other elements. Die-cast magnesium-zinc alloy, due to the specificity of its casting process and structure, makes its pretreatment before plating extremely difficult, and it is prone to poor bonding after plating. In order to prevent the die-casting magnesium-zinc alloy substrate from being oxidized by oxygen in the air, the surface of the substrate is generally protected by a layer of grease. These greases must be cleaned before electroplating, otherwise defects will appear on the coating, such as pinholes, burrs, etc., which will lead to electroplating failure and rework in severe cases, resulting in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/44C23G5/06
Inventor 戴峰
Owner 戴峰
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