CN114574860A - Local nickel plating process and application thereof - Google Patents

Abstract

The invention belongs to the technical field of deep treatment and application of motor parts, and particularly discloses a local nickel plating process and application thereof, wherein the process comprises the following step (1) of chemical oil removal. And (2) activating the solution for the first time to remove an oxidation film. And (3) electroplating the zinc-plated nickel alloy stock solution. And (4) activating the solution for the second time to remove the oxidation film. And (5) plating chemical nickel. And (6) passivating. And (7) drying and drying. The invention discloses a local nickel plating process and application thereof, which have the beneficial effects that: 1. the nickel plating device is used for stably, safely and high-quality nickel plating on the local part of the motor rotor piece, so that the performance of the motor rotor piece is improved, and the service life of a motor using the rotor piece after assembly is prolonged; 2. the nickel plating operation flow is reasonable in design, the rotor part is partially manufactured by nickel plating at one time, the yield is high, the nickel plating processing cost is reduced, and the economic benefit is improved.

Description

A kind of local nickel plating process and its application

technical field

The invention belongs to the technical field of deep treatment application of motor components, and particularly relates to a local nickel plating process and application thereof.

Background technique

Nickel plating refers to the method of plating a layer of nickel on metal or some non-metals by electrolysis or chemical method, which is called nickel plating. Nickel plating is divided into nickel plating and electroless nickel plating.

Nickel electroplating is in an electrolyte composed of nickel salt (called main salt), conductive salt, pH buffer, and wetting agent, the anode is metal nickel, the cathode is a plated part, and direct current is applied to the cathode (plated part). A layer of uniform and dense nickel plating is deposited, and bright nickel is obtained from the bath with brightener, and dark nickel is obtained in the electrolyte without brightener.

Electroless nickel plating, also known as electroless nickel plating, also known as autocatalytic nickel plating, refers to the process in which nickel ions in aqueous solution are reduced by reducing agents under certain conditions and deposited on the surface of solid substrates.

The motor rotor is a rotating part in the motor. The motor consists of two parts: the rotor and the stator. It is used to realize the conversion device between electrical energy and mechanical energy and mechanical energy and electrical energy.

The motor rotor, which needs to be nickel-plated during the production process (see Figure 1), is used to improve the hardness, wear resistance, corrosion resistance, acid resistance, etc. of the rotor parts.

Based on the above problems, the present invention provides a local nickel plating process and its application.

SUMMARY OF THE INVENTION

Purpose of the invention: The purpose of the present invention is to provide a local nickel plating process and its application, aiming at the deficiencies of the prior art, for efficient and high-quality nickel plating on the rotor parts locally.

Technical solution: The first aspect of the present invention provides a partial nickel plating process for rotor parts, which includes the following steps, step (1) chemical degreasing. Step (2) The solution is activated once to remove the oxide film. Step (3) Electroplating of zinc-nickel alloy stock solution. Step (4) The solution is activated twice to remove the oxide film. Step (5) Electroless nickel plating. Step (6) Passivation. Step (7) Blow dry and dry.

In this technical solution, in the step (1), a solution containing a degreaser is used for 10-15min rinsing, wherein the temperature of the solution during rinsing is 55-65 degrees Celsius, and there is no water-cut phenomenon on the surface after rinsing, so as to achieve the purpose of degreasing .

In the technical solution, the mass ratio of the degreasing agent in the solution is 50-60 g/L, and the balance is water.

In the technical solution, in the step (2), the primary activation solution includes an activator and a surfactant, and the balance is water, wherein the activation treatment time is 5-10s.

In the technical solution, the activator is hydrochloric acid, the mass ratio thereof is 50-80ml/L, and the mass ratio of the surfactant is 3-5g/L.

According to the technical solution, when the zinc-nickel alloy stock solution is used for electroplating in the step (3), the current density is 3-5A/dm², the electroplating time is 2.5h, and the electroplating is performed at room temperature.

In the technical solution, in the step (4), the secondary activation solution includes an activator and a surfactant, and the balance is water, wherein the activation treatment time is 5-10s.

In the technical solution, the activator is hydrochloric acid, the mass ratio thereof is 50-80ml/L, and the mass ratio of the surfactant is 3-5g/L.

According to the technical solution, the chemical nickel plating mixed solution in the step (5), the chemical nickel plating mixed solution includes an electroless nickel plating liquid and a conditioner, wherein the chemical nickel plating liquid product is composed of three agents, A, B, and C. A and B are opened in a ratio of 1:2, and A and C are added in a ratio of 1:1 as an intermediate supplement, the regulator is ammonia water, and the Ni content in the chemical nickel plating mixture is 5.4-6.2g/L, The temperature of the chemical nickel plating is 85-90° C., the pH value is 4.8-5, and the time is 1 hour.

In this technical solution, the passivation in step (6) is completed by using passivation solution, the mass ratio of passivation agent in the passivation solution is 50g/L, the balance is water, passivation at room temperature, and passivation time is 15- For 25 s, in the step (6), compressed air is used to dry, and the drying adopts a high-temperature dryer, the temperature is 85°C, and the time is 20-30Min.

A second aspect of the present invention provides a method for partial nickel plating of rotor parts, which includes the following steps: uniformly smearing protective high-temperature glue locally on the rotor part to be nickel-plated; Local nickel plating process.

Compared with the prior art, the beneficial effects of a local nickel plating process of the present invention and its application are: 1. It is used to perform stable, safe and high-quality nickel plating on the rotor part of the motor shown in FIG. The performance of the rotor part improves the service life of the motor using the rotor part after assembly; 2. The design of the nickel-plating operation process is reasonable, the nickel-plating rotor parts are partially completed at one time, the yield is high, the nickel-plating processing cost is reduced, and the economic benefit is improved.

Description of drawings

FIG. 1 is a schematic structural diagram of a nickel-plated rotor part of a local nickel-plating process of the present invention and its application.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

A local nickel plating process as shown in Figure 1 includes the following steps, step (1) chemical degreasing. Step (2) The solution is activated once to remove the oxide film. Step (3) Electroplating of zinc-nickel alloy stock solution. Step (4) The solution is activated twice to remove the oxide film. Step (5) Electroless nickel plating. Step (6) Passivation. Step (7) Blow dry and dry.

Preferably, in the local nickel plating process of the present invention, in the step (1), a solution containing a degreasing agent is used for 10-15min rinsing, wherein the temperature of the solution during rinsing is 55-65 degrees Celsius, and there is no water cutting phenomenon on the surface after washing. For the purpose of degreasing.

Preferably, in the local nickel plating process of the present invention, the mass ratio of the degreasing agent in the solution is 50-60 g/L, and the balance is water.

Preferably, in the local nickel plating process of the present invention, in the step (2), the primary activation solution includes an activator and a surfactant, and the balance is water, wherein the activation treatment time is 5-10s.

Preferably, in the local nickel plating process of the present invention, the activator is hydrochloric acid, the mass ratio of which is 50-80ml/L, and the mass ratio of the surfactant is 3-5g/L.

Preferably, in the local nickel plating process of the present invention, when the zinc-nickel alloy stock solution is used for electroplating in the step (3), the current density is 3-5A/dm², the electroplating time is 2.5h, and the electroplating at room temperature.

Preferably, in the local nickel plating process of the present invention, in the step (4), the secondary activation solution includes an activator and a surfactant, and the balance is water, wherein the activation treatment time is 5-10s.

Preferably, in the local nickel plating process of the present invention, the activator is hydrochloric acid, the mass ratio of which is 50-80ml/L, and the mass ratio of the surfactant is 3-5g/L.

Preferably, in the local nickel plating process of the present invention, the electroless nickel plating mixture in the step (5) includes an electroless nickel plating liquid and a conditioner, wherein the electroless nickel plating liquid product is composed of A, B, C is composed of three agents, A and B are opened in a ratio of 1:2, A and C are added in a ratio of 1:1, as an intermediate supplement, the regulator is ammonia water, and the Ni content in the chemical nickel plating mixture is 5.4- 6.2g/L, the temperature of the chemical nickel plating is 85-90°C, the pH value is 4.8-5, and the time is 1 hour.

Preferably, in the local nickel plating process of the present invention, the passivation in the step (6) is completed by using a passivation solution, the mass ratio of the passivation agent in the passivation solution is 50 g/L, the balance is water, and the passivation is carried out at room temperature. The curing time is 15-25s, and in the step (6), compressed air is used to dry, and the drying adopts a high-temperature dryer, the temperature is 85°C, and the time is 20-30Min.

Example

The application of the local nickel plating process of the present invention, pretreatment: partial nickel plating of the rotor parts Evenly coat the rotor parts to be nickel plated with high temperature glue to protect the parts, first use the solution to rinse for 10-15Min, and use a heating rod to heat the solution to 58 degrees Celsius , and then use a mixture of activators and surfactants for one activation, the activation time is controlled at 7-9s, and then use the zinc-nickel alloy stock solution for 2 hours of electroplating, the current density is 4.5-4.8A/dm², reuse The mixed solution composed of activator and surfactant is activated for the second time, and the activation time is controlled at 8s, and then the electroless nickel plating mixture is used for electroless nickel plating. The Ni content is 5.5-5.8g/L, and the temperature is 87-88.5℃. The pH value is 4.8, and the time is 1.2 hours. Then passivation is carried out with passivation solution, and passivation is carried out at room temperature. The passivation time is 20s. Finally, it is dried with compressed air, and then dried with a high-temperature dryer at a temperature of 80 °C. , the time is 25Min.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A local nickel plating process is characterized in that: comprises the following steps of (a) carrying out,

chemical oil removal;

step (2), activating the solution for the first time to remove an oxide film;

electroplating the zinc-nickel alloy plating stock solution;

step (4), secondary activating solution is carried out, and oxide films are removed;

plating chemical nickel;

passivating in step (6);

and (7) drying and drying.

2. A process of localized nickel plating as claimed in claim 1, wherein: and (2) performing 10-15Min washing by using a solution containing an oil removal agent in the step (1), wherein the temperature of the solution is 55-65 ℃ during washing, and the purpose of removing oil is achieved when no water cutting phenomenon exists on the surface after washing.

3. A process of localized nickel plating as claimed in claim 2, characterized in that: the mass ratio of the oil removing agent in the solution is 50-60g/L, and the balance is water.

4. A process of localized nickel plating as claimed in claim 1, wherein: the primary activation solution in the step (2) comprises an activating agent, a surfactant and the balance of water, wherein the activation treatment time is 5-10 s.

5. A process of locally plating nickel according to claim 4, wherein: the activating agent is hydrochloric acid, the mass ratio of the activating agent is 50-80ml/L, and the mass ratio of the surfactant is 3-5 g/L.

6. A process of localized nickel plating as claimed in claim 1, wherein: when the zinc-nickel alloy plating stock solution is adopted for electroplating in the step (3), the current density is 3-5A/dm, the electroplating time is 2.5h, and the normal-temperature electroplating is performed.

7. A process of localized nickel plating as claimed in claim 1, wherein: and (4) the secondary activation solution in the step (4) comprises an activating agent, a surfactant and the balance of water, wherein the activation treatment time is 5-10 s.

8. A process of topical nickel plating according to claim 7, characterised in that: the activating agent is hydrochloric acid, the mass ratio of the activating agent is 50-80ml/L, and the mass ratio of the surfactant is 3-5 g/L.

9. A process of localized nickel plating as claimed in claim 1, wherein: and (3) the chemical nickel plating mixed solution in the step (5) comprises chemical nickel plating liquid medicine and a regulator, wherein the chemical nickel plating liquid medicine product consists of A, B, C three agents, and A and B are mixed according to the proportion of 1: 2, opening the cylinder, and mixing A and C according to the proportion of 1: 1, adding the mixture serving as an intermediate extender, using ammonia water as a regulator, controlling the Ni content in the mixed solution for chemical nickel plating to be 5.4-6.2g/L, controlling the temperature to be 85-90 ℃ and the pH value to be 4.8-5 during chemical nickel plating, completing the passivation in the step (6) by using a passivation solution, controlling the mass ratio of a passivator in the passivation solution to be 50g/L and the balance to be water, passivating at normal temperature for 15-25s, drying the mixture in the step (6) by blowing compressed air, and drying the mixture by using a high-temperature dryer at the temperature of 85 ℃ and the time of 20-30 Min.

10. A local nickel plating method for a rotor part is characterized by comprising the following steps: the method comprises the following steps of uniformly coating high-temperature protection glue on the local part of the rotor piece to be plated with nickel, and carrying out the local nickel plating process according to any one of claims 1-9 on the local part of the rotor piece coated with the high-temperature protection glue.

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