Zinc-plating additive and preparation method thereof

A technology of additives and chloride additives, applied in the field of galvanizing additives and its preparation, can solve problems such as the gap in galvanizing quality

Inactive Publication Date: 2011-10-12
HUBEI DE MEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still some gap between the existing chloride ga

Method used

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  • Zinc-plating additive and preparation method thereof

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Embodiment Construction

[0012] Below by example the present invention is further described.

[0013] We took the additives to Jilin Jidian Equipment Factory for acid galvanizing solution electroplating (5 tons of bath solution for electroplating), and the results are shown in the table:

[0014]

[0015] According to the above data, it can be seen that when other conditions are the same but the content of additives is different, the coatings to be plated are slightly different. The optimal value should be controlled at 1g / L of agent A and 20 g / L of agent B, so that the crystallization of the electroplated zinc layer is fine and smooth, and the brightness is high.

[0016] The main technical and performance indicators of the acidic chloride galvanizing additive of the present invention are as follows:

[0017] Agent A Agent B

[0018] Appearance dark yellow light yellow

[0019] PH 5.0~5.5 5.0~5.5

[0020] Galvanizing bath temperature 10~40℃ 10~40℃

[0021] After trial and error, add 1 ml / L of...

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Abstract

The invention discloses an acidic chloride zinc-plating additive and a preparation method thereof. The additive consists of a brightening agent A and a softening agent B, wherein the brightening agent A is prepared by dissolving 20 to 30 weight parts of benzalacetone into 100 weight parts of alkylphenol ethoxylates with stirring at room temperature under normal pressure at the rotate speed of between 10 and 100 revolutions/minute, and the softening agent B is prepared by dissolving 1.8 to 5.8 weight parts of nicotinic acid 100 weight parts of dodecanol polyoxyethylene ether with stirring at the room temperature under the normal pressure at the rotate speed of between 10 and 100 revolutions/minute. The additive is prepared from 0.6 to 1.6 grams/liter of brightening agent A, 10 to 30 grams/liter of softening agent B and a proper amount of water. The additive is added into acidic zinc-plating solution, so that a zinc coating which is high in brightness and flattening, small in internal force and high in current efficiency can be obtained.

Description

technical field [0001] The invention relates to an additive for an acidic chloride galvanizing solution and a preparation method thereof. Background technique [0002] Chloride galvanizing has developed rapidly in my country since the 1980s. The plating solution of this process is a single-salt plating solution without complexing agents, and the wastewater is easy to handle. The dispersion ability and deep plating ability of the plating solution are second only to cyanide galvanizing. , high current efficiency, fast deposition speed, and at the same time, the plating solution has little corrosion on the equipment, stable and safe. However, there is still some gap between the existing chloride galvanizing and cyanide galvanizing in terms of galvanizing quality. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an acidic chloride galvanizing additive with strong impurity resistance, high stability and wide process ra...

Claims

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Application Information

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IPC IPC(8): C25D3/22
Inventor 瞿德勤
Owner HUBEI DE MEI TECH
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