阅读说明：本技术 一种环保无氨化学镍稳定剂 (Environment-friendly ammonia-free chemical nickel stabilizer ) 是由 胡国辉 刘军 周辉 肖春艳 包海生 于 2021-08-09 设计创作，主要内容包括：本发明专利公开了一种环保无氨化学镍稳定剂,具体涉及电镀技术领域。一种环保无氨化学镍稳定剂,包括所述稳定剂由酮类物质和水构成。采用本发明技术方案解决了传统的镀镍工艺中需要氨水的问题,可用于优化镀镍工艺,同时提高操作人员的身体健康。(The invention discloses an environment-friendly ammonia-free chemical nickel stabilizer, and particularly relates to the technical field of electroplating. An environment-friendly ammonia-free chemical nickel stabilizer comprises a stabilizer composed of a ketone substance and water. The technical scheme of the invention solves the problem that ammonia water is needed in the traditional nickel plating process, can be used for optimizing the nickel plating process, and simultaneously improves the physical health of operators.)

1. An environment-friendly ammonia-free chemical nickel stabilizer is characterized in that: the stabilizer is composed of ketone substances and water.

2. The environmentally friendly ammonia-free chemical nickel stabilizer of claim 1, wherein: the ketone material is a mixture of nicotinone and tropinone.

3. The environmentally friendly ammonia-free chemical nickel stabilizer of claim 2, wherein: the mass ratio of the nicotinone in the stabilizer is 1-5g/L, and the mass ratio of the tropinone in the stabilizer is 3-8 g/L.

4. The environmentally friendly ammonia-free chemical nickel stabilizer of claim 1, wherein: the water is deionized water.

Technical Field

The invention relates to the technical field of electroplating, in particular to an environment-friendly ammonia-free chemical nickel stabilizer.

Background

The alkalescent chemical nickel plating process is widely applied to nickel priming treatment on the surfaces of base materials such as aluminum alloy, ABS plastic, ceramics and the like. The traditional process adopts ammonia water as a regulator of the pH value of the plating solution, and the ammonia water is a strong alkaline volatile substance, has toxicity, has irritation and corrosivity to eyes, nose and skin of people and can suffocate people. The maximum allowable concentration in air is 30mg/m³Has a certain corrosion effectThe corrosiveness of the carbonized ammonia water is more serious. The ammonia water has stronger corrosion to copper, poorer corrosion to steel, less corrosion to cement and certain corrosion to wood.

The use of ammonia has great harm to human and environment, and also accelerates the corrosion of production equipment, so the removal of ammonia water in the alkalescent chemical nickel is imperative. However, ammonia water has a complexing effect on nickel ions in the plating solution to stabilize the plating solution, and if sodium hydroxide is directly used for replacing ammonia water, the stability of the plating solution is poor, and the plating solution is decomposed in a period of time, so that the formula of the plating solution must be adjusted and a proper stabilizer must be found, so that the stable and sustainable use of the plating solution is achieved, and the production effect is met.

Disclosure of Invention

The invention aims to provide an environment-friendly ammonia-free chemical nickel stabilizer, which solves the problem that ammonia water is needed in the traditional nickel plating process.

In order to achieve the purpose, the technical scheme of the invention is as follows: an environment-friendly ammonia-free chemical nickel stabilizer, which consists of a ketone substance and water.

Further, the ketone substance is a mixture of nicotinone and tropinone.

Further, the mass ratio of the nicotinone in the stabilizer is 1-5g/L, and the mass ratio of the tropinone in the stabilizer is 3-8 g/L.

Further, the water is deionized water.

Compared with the prior art, the beneficial effect of this scheme:

in the stabilizer of the scheme, the introduction of the ketone group can not only complex nickel ions in the plating solution, but also adsorb other impurity metal ions which easily cause the decomposition of the plating solution, so that the plating solution is more stable. Meanwhile, the nickel plating process of the scheme gets rid of the dependence on ammonia water, reduces the harm to operators in the processing process and does not have adverse effect on the whole processing process.

Drawings

FIG. 1 is a schematic representation of an ABS plastic part of example 1 after being nickel-plated with a nickel solution without a stabilizer;

FIG. 2 is a schematic representation of ABS plastic parts of example 1 after being nickel-plated with a nickel solution containing a stabilizer.

Detailed Description

The present invention will be described in further detail below by way of specific embodiments:

example 1

As shown in figures 1 and 2: the stabilizer in the embodiment is composed of 1g/L of nicotinone, 3g/L of tropinone and deionized water in the balance. When in use, deionized water is used for preparing a solution, and then the solution is added into the ammonia-free chemical nickel plating solution according to the corresponding working concentration of the specified stabilizing agent.

The operation flow of the electroplating process using the nickel plating solution comprises the following steps:

step one, putting an ABS plastic part into LD-1146 deoiling liquid at the temperature of about 60 ℃, chemically deoiling for 10min, and taking out for washing.

And step two, placing the ABS plastic part cleaned in the step one in a coarsening solution at about 70 ℃ for coarsening for 9min, taking out and washing, wherein the coarsening solution is formed by mixing chromic anhydride with the concentration of 380g/L and sulfuric acid with the concentration of 400 g/L.

And step three, placing the ABS plastic part cleaned by the water in the step two into a neutralizing solution, soaking for 2min, taking out and washing with water, wherein the neutralizing solution adopts 200ml/L of HCL.

Step four, soaking the ABS plastic part washed clean in the step three in a pre-immersion liquid for 1-2min, wherein the pre-immersion liquid is composed of HCL with the concentration of 200ml/L and SnCl with the concentration of 2g/L₂And (3) mixing.

Fifthly, putting the presoaked ABS plastic part into a palladium activation sensitizing solution for 4min, taking out and washing, wherein the palladium activation sensitizing solution is prepared from HCL with the concentration of 200ml/L and SnCl with the concentration of 3g/L₂And 1ml/L colloidal palladium.

And step six, putting the ABS plastic part cleaned in the step five into the LD-5107 degumming solution at the temperature of 40 ℃ for soaking for 4min, and taking out and washing.

And step seven, putting the ABS plastic piece cleaned by the water in the step six into the prepared ammonia-free chemical nickel solution for reaction for 10min, and taking out and washing the ABS plastic piece.

And step eight, carrying out subsequent electroplating treatment on the ABS plastic piece cleaned with water in the step seven.

The test method comprises the following steps:

preparing two identical nickel solutions without ammonia water, wherein the volume of the nickel solutions is 1L, adding the stabilizer with the concentration of 10g/L into one of the nickel solutions without ammonia water, adding no substance into the other nickel solution without ammonia water, then respectively placing the two identical ABS plastics which are pretreated into different nickel solutions, carrying out consumption tests for a plurality of times, and observing the solution change and the appearance of a plating layer, thereby obtaining the test results of the attached drawings 1 (ABS plastic parts plated by the nickel solution without the stabilizer) and 2 (ABS plastic parts plated by the nickel solution with the stabilizer).

Example 2

This example differs from example 1 only in that: the mass ratio of the nicotinone to the tropinone is different, in this embodiment, the mass ratio of the nicotinone is 5g/L, and the mass ratio of the tropinone is 8 g/L.

The test method of this example was the same as that of example 1, and the test results were the same as those of the ABS plastic part of example 1.

Example 3

This example differs from example 1 only in that: the mass ratio of the nicotinone to the tropinone is different, in this embodiment, the mass ratio of the nicotinone is 3g/L, and the mass ratio of the tropinone is 5 g/L.

The test method of this example was the same as that of example 1, and the test results were the same as those of the ABS plastic part of example 1.

Example 4

This example differs from example 1 only in that: the mass ratio of the nicotinone to the tropinone is different, in this embodiment, the mass ratio of the nicotinone is 1g/L, and the mass ratio of the tropinone is 8 g/L.

The test method of this example was the same as that of example 1, and the test results were the same as those of the ABS plastic part of example 1.

Example 5

This example differs from example 1 only in that: the mass ratio of the nicotinone to the tropinone is different, in this embodiment, the mass ratio of the nicotinone is 5g/L, and the mass ratio of the tropinone is 3 g/L.

The test method of this example was the same as that of example 1, and the test results were the same as those of the ABS plastic part of example 1.

As can be seen from examples 1 to 5:

as can be seen from FIG. 1, if no stabilizer is added, the plating solution becomes abnormal without being used for one cycle, and the appearance of the nickel plating layer becomes rough and black.

As can be seen from the attached figure 2, after the stabilizer is added, the stability of the plating solution is obviously improved, and the appearance of the plating layer is still good after more than four cycles of continuous use.

In view of the above, it can be seen that the appearance of the ammonia-free chemical nickel plating layer is significantly improved after the stabilizer is added, and the addition of the stabilizer does not adversely affect other excellent properties of the plating solution. By adjusting the content and the proportion of the nicotinone and the tropinone, nickel ions in the plating solution can be complexed, and other impurity metal ions which are easy to cause the decomposition of the plating solution can be adsorbed, so that the plating solution is more stable.

The scheme uniformly adopts the mixture for consistency and convenience, because the ketone substances belong to the second stabilizer (namely organic compound stabilizer) of the three stabilizers, the stabilizers can be dissolved in water, but the stabilizers can be repelled by water in aqueous solution, so that the stabilizers can be adsorbed on the surface of a workpiece, especially molecules containing aromatic rings, and the adsorption is more easily generated due to the interaction of pi electrons and the surface of the workpiece. The adsorption phenomenon can prevent excessive nickel ions from participating in the reaction, properly reduce the reaction speed of the surface, slow down the deposition of nickel and further play a role in stabilizing the plating solution.

The foregoing are merely examples of the present invention and common general knowledge of known specific structures and/or features of the schemes has not been described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.