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Alkaline electroplating Zn-Ni alloy additive, electroplating solution and preparation method

A technology of electroplating zinc-nickel and additives, applied in the field of electroplating alloy additives, which can solve the problems of increased electroplating costs, low current efficiency, and uneven product performance, and achieve high corrosion resistance, low coating stress, and high coverage.

Inactive Publication Date: 2011-01-12
济南德锡科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the research and development of this process in China is still in its infancy. At present, most manufacturers are still using additives from imported manufacturers. The price is relatively high, which leads to a relatively high cost of electroplating. Therefore, the development of alkaline zincate-type zinc-nickel alloys in China Additives are the development trend
Chinese patent CN1746337A discloses an alkaline zincate plating solution, the current efficiency of this kind of plating solution is low, the plating solution is not easy to control, it is easy to be unbalanced, and the nickel content of the coating is uneven, which easily leads to inconsistent product performance

Method used

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  • Alkaline electroplating Zn-Ni alloy additive, electroplating solution and preparation method
  • Alkaline electroplating Zn-Ni alloy additive, electroplating solution and preparation method
  • Alkaline electroplating Zn-Ni alloy additive, electroplating solution and preparation method

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Experimental program
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Effect test

Embodiment 1

[0044] Embodiment 1 nickel complexing agent preparation

[0045] 1) Recipe 1 (1L as an example) (Specific values ​​must be used in the specific examples to support the scope of the claim but not the scope)

[0046] Ethanolamine 150g

[0047] Citric acid 180g

[0048] the rest is water;

[0049] Preparation method: After accurately weighing the two substances, dissolve them in water, and stir them evenly at a constant volume.

[0050] 2) Formula 2 (1L as an example)

[0051] N-(2-hydroxyethyl)ethylenediamine 120g

[0052] Polyacrylamine (500 molecular weight) 145g

[0053] Alpha-Hydroxybutyric Acid 190g

[0054] the rest is water;

[0055] The preparation method is the same as formula 1.

[0056] 3) Recipe 3 (1L as an example)

[0057] Diethylenetriamine 195g

[0058]Polyvinylamine (800 molecular weight) 130g

[0059] Glucose 180

[0060] the rest is water;

[0061] The preparation method is the same as formula 1.

Embodiment 2

[0062] The preparation of embodiment 2 zinc complexing agent

[0063] 1) Recipe 1 (1L as an example)

[0064] N-(2-Hydroxyethyl)-N,N',N'-triethylethylenediamine 700g

[0065] the rest is water;

[0066] Preparation method: After accurately weighing the substance, dissolve it in water, and stir it evenly at a constant volume.

[0067] 2) Formula 2 (1L as an example)

[0068] N,N,N',N'-Tetrahydroxyethylethylenediamine 850g

[0069] the rest is water;

[0070] The preparation method is the same as the formula one of this embodiment.

[0071] 3) Recipe three

[0072] N,N,N',N'-tetrakis(2,3-dihydroxypropyl)ethylenediamine 800g

[0073] The rest is water.

[0074] The preparation method is the same as the formula one of this embodiment.

Embodiment 3

[0075] The preparation of embodiment 3 brighteners

[0076] 1) Recipe 1 (1L as an example)

[0077] Piperazine 220g

[0078] Vinyl glycol propargyl alcohol ester 100g

[0079] the rest is water;

[0080] Preparation method is the same as embodiment 3 formula one.

[0081] 2) Formula 2 (1L as an example)

[0082] N-Phenyl-3-carboxypyridine chloride 120g

[0083] Pyridinium Propane Sulfonate 160g

[0084] the rest is water;

[0085] Preparation method is the same as embodiment 3 formula one.

[0086] 3) Recipe 3 (1L as an example)

[0087] Piperazine 150g

[0088] Pyridinium Propane Sulfonate 140g

[0089] the rest is water;

[0090] Preparation method is the same as embodiment 3 formula one. '

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Abstract

The invention relates to an alkaline electroplating Zn-Ni alloy additive, an electroplating solution and a preparation method. The additive comprises the following components in parts by weight: 3.5 to 4.5 parts of nickel complex agent, 6 to 8 parts of nickel source, 7 to 8.5 parts of zinc complex agent, 1.5 to 2.5 parts of brightening agent and 0.2 to 0.3 part of throwing agent. The preparation method comprises the following steps: adding zinc oxide into dissolved sodium hydroxide, stirring and dissolving; adding the zinc complex agent, the nickel complex agent, nickel replenisher, the brightening agent and the throwing agent in turn; and stirring to ensure that the mixture is mixed uniformly so as to prepare the electroplating solution containing the additive. The alkaline electroplating Zn-Ni alloy additive can acquire excellent metal distribution and constant alloy composition within a wide current density range, has stable nickel content of the plating in a range of between 12 and 15 percent, excellent corrosion resistance which is over five times more than a conventional zinc coating, excellent dispersive power and higher current efficiency, and can be used for barrel plating or rack plating with small coating stress, high ductility and excellent brightness.

Description

technical field [0001] The invention relates to an electroplating alloy additive, in particular to an alkaline zincate zinc-nickel alloy additive, an electroplating solution and a preparation method thereof. Background technique [0002] The traditional zinc coating as an anti-rust method for steel parts can no longer meet the requirements of modern products. Therefore, various manufacturers have begun to study zinc-based alloy electroplating products, such as zinc-nickel alloy, zinc-iron alloy and zinc-cobalt alloy. From the anti-rust mechanism and actual corrosion resistance of zinc-based alloys on steel, zinc-nickel alloy coatings have the best corrosion resistance, and have good wear resistance and heat resistance, which can meet the requirements of downstream manufacturers for coatings. [0003] The corrosion resistance of the zinc-nickel alloy coating containing 6-20% nickel is more than three times higher than that of the zinc coating of the same thickness, and the zi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56
Inventor 王鲁艳史晓峰
Owner 济南德锡科技有限公司
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