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Nickel-phosphorus chemical precipitation plating layer of aluminium alloy

A chemical deposition, aluminum alloy technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problems of long service life, short service life of chemical nickel, etc., and achieve the effect of long service life

Inactive Publication Date: 2010-02-03
郑建国 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides an aluminum alloy nickel-phosphorus electroless deposition coating with a long service life in view of the short service life of chemical nickel currently on the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: manufacture the aluminum alloy nickel-phosphorus electroless deposition coating that contains bright intermediate, it has advantages such as glossiness is good, and it realizes by following specific implementation:

[0018] Nickel sulfate hexahydrate: 25 g / l

[0019] Sodium hypophosphite: 30 g / L

[0020] Sodium acetate: 20 g / L

[0021] Succinic acid: 7.5 g / l

[0022] Lactic acid: 35ml / l

[0023] Citric acid: 8 g / L

[0024] Propionic acid: 2.5 ml / l

[0025] Sodium thiosulfate: 25PPM

[0026] Sodium molybdate: 20PPM

[0027] BEO: 20PPM

[0028] PME: 30PPM

[0029] PPS: 20PPM

[0030] The specific method of use of the present invention is as follows: the pH value of the solution is adjusted to 4.6 with ammonia water or 20% sodium hydroxide with a concentration of 1:1. After galvanizing, immerse and deposit for a few minutes to obtain a bright aluminum alloy nickel-phosphorus electroless deposition coating.

Embodiment 2

[0031] Embodiment 2: manufacture the aluminum alloy nickel-phosphorus electroless deposition coating with long service life, it can improve the service life of solution by introducing anti-impurity agent, specific implementation method is as follows:

[0032] Nickel sulfate hexahydrate: 27 g / l

[0033] Sodium hypophosphite: 30 g / L

[0034] Sodium acetate: 15 g / l

[0035] Succinic acid: 9 g / L

[0036] Lactic acid: 30ml / L

[0037] Glycine: 7.5 g / l

[0038] Citric acid: 8 g / L

[0039] Potassium iodate: 20PPM

[0040] Thiosemicarbazide: 3PPM

[0041] EDTA: 0.075 g / L

[0042] ALS: 0.05 g / L

[0043] VS: 0.12 g / L

[0044] The method used in this embodiment is the same as in Example 1, and the service life of the solution can be prolonged by introducing an anti-impurity agent, and the anti-impurity ability can be strengthened, reaching more than 10 service cycles.

Embodiment 3

[0045] Embodiment 3: Manufacture the aluminum alloy nickel-phosphorus chemical deposition coating that is bright and has a long service life cycle, and it obtains a bright and long-lived nickel deposit by introducing a brightener and an anti-impurity agent, and its nickel layer is corrosion-resistant and resistant Good abrasiveness. The specific implementation is as follows:

[0046] Nickel sulfate hexahydrate: 27 g / l

[0047] Sodium hypophosphite: 30 g / L

[0048] Sodium acetate: 15 g / l

[0049] Succinic acid: 7.5 g / l

[0050] Lactic acid: 30ml / L

[0051] Glycolic acid: 5 g / L

[0052] Triethanolamine: 2 g / L

[0053] Malic acid: 7.5 g / l

[0054] Propionic acid: 3 ml / l

[0055] Potassium iodide: 15PPM

[0056] Sodium molybdate: 20PPM

[0057] DEP: 30PPM

[0058] PPS: 25PPM

[0059] BEO: 10PPM

[0060] ALS: 0.15 g / L

[0061] The method used in this embodiment is the same as in Example 1. The nickel layer deposited by the present invention has excellent performance, ...

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Abstract

The invention relates to a nickel-phosphorus chemical precipitation plating layer of an aluminium alloy, mainly containing the following components in content by weight: 20-30 grams / litre of hexahydrated nickel sulphate, 20-30 grams / litre of sodium hypophosphite, 15-20 grams / litre of sodium acetate, 6-10 grams / litre of butane diacid, 30-50 grams / litre of complexing agents, 20-60 PPM of stabilizingagent and 30-100 PPM of plating midbodies. The nickel-phosphorus chemical precipitation plating layer has the advantages of fast precipitation, well combining force of a plating layer, brightness andcompactness of the plating layer, excellent stable property of tank liquor, long service life, easy maintenance, and the like.

Description

technical field [0001] The invention relates to a nickel-phosphorus chemical deposition coating, in particular to an aluminum alloy nickel-phosphorus chemical deposition coating which acts on an aluminum alloy material, has excellent performance of the nickel-phosphorus coating, and has a solution service life of more than 10 cycles. Background technique [0002] In recent years, with the rapid development of electronic technology, aluminum alloy heat sinks are mostly used for heat dissipation of circuit control boards. Aluminum alloys require welding, and in order to improve welding performance, it is often required to deposit an electroless nickel coating. However, after several years of development of chemical nickel on the market today, the technology of chemical deposition of nickel has been greatly improved. In production, the service life of chemical deposition of nickel-phosphorus on aluminum alloys can reach 5-6 cycles, which can basically meet the production requir...

Claims

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Application Information

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IPC IPC(8): C23C18/36
Inventor 郑建国王清
Owner 郑建国
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