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Low-foam carrier brightening agent and using method thereof

A carrier brightener and brightener technology, which is applied in the field of electroplating, can solve the problems of main brightener damage, high brittleness of the coating, and limited application, and achieve the effects of reduced additive consumption, low additive consumption, and high current density

Active Publication Date: 2012-03-21
GUANGZHOU SANFU NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing problems: 1. High foam in the plating solution; 2. Large consumption of brightener and many decomposition products; 3. More organic inclusions in the coating, high brittleness of the coating, difficult passivation, easy discoloration of the passivation film, and poor corrosion resistance of the coating
Existing problems: 1. Although the foam is lower than the first-generation potassium chloride galvanizing, it cannot be stirred by air because it depends on the organic solvent in the brightener to defoam; 2. The main brightener o-chlorobenzaldehyde and its derivatives The stability of the material is poor, if the plating solution uses hydrogen peroxide or potassium permanganate to remove iron (Fe 2+ ), the main light agent in the plating solution will also be destroyed; 3. When the galvanized layer is passivated, the bonding force of the film layer is poor and it is easy to remove the film. Therefore, the second-generation potassium chloride galvanizing is more suitable for silver-white passivation or Blue and white passivation is not suitable for color passivation; 4. The corrosion resistance of the galvanized layer after passivation (neutral salt spray test) is not as good as cyanide galvanizing and alkaline galvanizing
Therefore, its application in industries requiring high corrosion resistance of the galvanized layer is limited.

Method used

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  • Low-foam carrier brightening agent and using method thereof
  • Low-foam carrier brightening agent and using method thereof
  • Low-foam carrier brightening agent and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The bath formula and process conditions of potassium chloride galvanizing process are as shown in table 2:

[0045] Table 2

[0046]

[0047] Softener composition: 10% low-foam carrier brightener (including 0.5% non-ionic silicone surfactant, 9.5% isomeric tridecyl alcohol polyoxyethylene ether, EO=100), 6% sodium benzoate, 5% methanol , the balance is water;

[0048]Brightener composition: 3% o-chlorobenzaldehyde, 5.3% low-foam carrier brightener (including 0.3% non-ionic silicone surfactant, 5% isomeric tridecyl polyoxyethylene ether, EO=50), 5% % methanol, the balance is water;

[0049] Wherein, the structural formula of the above-mentioned nonionic silicone surfactant is:

[0050]

[0051] R=O(C 2 h 4 O) a (C 3 h 6 O) b (C 2 h 4 O) c CH 3 , a=16, b=10, c=15; n=7.

[0052] Adopt the formula of potassium chloride galvanized plating solution of embodiment 1 and process condition to carry out Hobster's tank test, plating solution does not carry out c...

Embodiment 2

[0054] The bath formulation and process conditions of potassium chloride galvanizing process are as shown in table 3:

[0055] table 3

[0056]

[0057] Softener composition: 10.8% low-foam carrier brightener (including 0.8% non-ionic silicone surfactant, 10% isomeric tridecyl alcohol polyoxyethylene ether EO=100), 7% sodium benzoate, 6% ethanol, The remainder is water;

[0058] Brightener composition: 4% benzylidene acetone, 6.4% low-foam carrier brightener (including 0.4% non-ionic silicone surfactant, 6% isomeric tridecyl polyoxyethylene ether EO=50), 6 % ethanol, the balance is water;

[0059] Wherein, the structural formula of the above-mentioned nonionic silicone surfactant is:

[0060]

[0061] R=O(C 2 h 4 O) a (C 3 h 6 O) b (C 2 h 4 O) c CH 3 , a=16, b=10, c=15; n=8.

[0062] Adopt the formula of potassium chloride galvanized plating solution of embodiment 2 and process condition to carry out Huo's tank test, plating solution does not carry out comp...

Embodiment 3

[0064] The bath formula and process conditions of potassium chloride galvanizing process are as shown in table 4:

[0065] Table 4

[0066]

[0067] Softener composition: 10% low-foam carrier brightener (including 0.7% non-ionic silicone surfactant, 9.3% octylphenol polyoxyethylene ether EO=100), 8% sodium benzoate, 8% ethylene glycol ether , the balance is water;

[0068] Brightener composition: 5% o-chlorobenzaldehyde and benzylidene acetone reactant, 10% low-foam carrier brightener (including 0.5% non-ionic silicone surfactant, 9.5% lauryl alcohol polyoxyethylene ether EO =50), 7% ethylene glycol ether, and the balance is water;

[0069] Wherein, the structural formula of o-chlorobenzaldehyde and benzylidene acetone reactant is:

[0070]

[0071] The structural formula of nonionic silicone surfactant is:

[0072]

[0073] R=O(C 2 h 4 O) a (C 3 h 6 O) b (C 2 h 4 O) c CH 3 , a=16, b=10, c=15; n=9.

[0074] Adopt the formula of potassium chloride galvan...

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Abstract

The invention discloses a low-foam carrier brightening agent. The low-foam carrier brightening agent comprises 90 to 95 mass percent of nonionic surfactant and 5 to 10 mass percent of nonionic organic silicon surfactant. The invention also discloses a softening agent and a brightening agent prepared by compounding the low-foaming carrier brightening agent, and a potassium chloride galvanizing additive prepared by compounding the softening agent and the brightening agent. The invention also provides a process for galvanizing potassium chloride by using the additive. A plating solution of the potassium chloride galvanizing additive is low-foam, can be stirred by compressed air, and has large permissible current density and high sedimentation velocity. The additive has low consumption. Compared with the first generation and the second generation of potassium chloride galvanizing processes, the process for galvanizing the potassium chloride by using the additive has the advantages that: the additive consumption can be reduced by 30 to 50 percent; a few organic matters are attached to a zinc coating; and corrosion resistance is high.

Description

technical field [0001] The invention belongs to the technical field of electroplating, and relates to a low-foam carrier brightener and its application in electroplating technology. Background technique [0002] Chloride acid galvanizing has developed rapidly in the United States since 1967. The early baths contained ammonium and chelating agents, and later developed low-ammonium mixed and ammonium-free chloride galvanizing baths. In the 1980s, with the successful research of new additives, the first generation of potassium chloride galvanizing additives was developed. The composition of the plating solution is simple, the coating is bright, and the current efficiency is high. Carbon steel parts are galvanized, and waste water treatment is simple and easy. Existing problems: 1. High foam in the plating solution; 2. Large consumption of brightener and many decomposition products; 3. More organic inclusions in the coating, high brittleness of the coating, difficult passivatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22
Inventor 詹益腾胡明
Owner GUANGZHOU SANFU NEW MATERIALS TECH
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