JPH02221399A - Small-sized test cell for composite plating - Google Patents

Abstract

PURPOSE:To constitute the small-sized test cell for the subject plating which can surely form the subject plating film with good reproducibility by engaging a floor member consisting of a flat bottom and upward tapered walls connected to the outer peripheral edges thereof with the inside of a peripheral wall body of a square ring shape having rounded four corners. CONSTITUTION:The small-sized test cell 1 is constituted of a cell body 2 and the floor member 3 and the cell body 2 is constituted of the peripheral wall body 4 of approximately the square ring shape which has the rounded inner peripheral surfaces at the four corners 4a and a bottom plate 5 which is closed at the bottom opening thereof. The floor member 3 consists of the square flat bottom 6 having the rounded four corners and the annular tapered wall parts 7 inclining gradually upward from the outer peripheral edges toward the outside. The four corners of the tapered wall parts 7 are formed as the curved corner parts 7c which have roundness and connect the side face parts 7a on one side and the side face parts 7b on the other side adjacent to each other. The top ends of the curved corner parts 7c have the roundness corresponding to the roundness at the four corners of the peripheral wall body 4. The plating liquid is uniformly stirred without stagnation in this way and the particulate materials are uniformly dispersed therein.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small-sized composite plating test tank used in a composite plating test in which composite materials such as inorganic or organic fine particles are eutectoided into a plating film.

Composite plating, in which composite materials such as inorganic or organic fine particles are eutectoided into a plating film, has been widely used for various purposes.
For testing composite plating solutions, Hull cell test equipment and 1-5Q
A plating test solution is placed in a beaker, and plating is performed using magnetic stirrer or propeller stirring to test the appearance of the plating film and the eutectoid amount of the composite material.

However, in Hull cell test equipment and beaker tests,
Although it is possible to test the performance of composite plating films to some extent, it is not sufficient to reproduce the conditions of the plating tank on site.

For this reason, the present inventor conducted a composite plating test using a smaller version of the same rectangular box tank used in the field, but the stirring method used in this case was that the stirring method using a magnetic stirrer was used in the center of the plating tank. This is suitable because a rotor can be placed in the center to stir the mixture, and for this reason we attempted to use a magnetic stirrer. However, in such a plating test using plating stirring, there are problems such as air being mixed into the plating solution due to inappropriate stirring, and inappropriate vortices being generated, resulting in poor appearance of the plating due to the influence of these stirrings. The composite material is not uniformly dispersed in the plating solution and often settles near the bottom periphery of the plating tank, especially at the four corners, ensuring that all the added composite material is not used for plating, and this results in the eutectoid amount being added. Good reproducibility may not be obtained because the amount of eutectoid is not commensurate with the amount of composite material applied, the amount of eutectoid decreases, and the amount of eutectoid varies between plating test pieces, and the amount of eutectoid differs between plating tests. there were. In this case, even if a propeller agitation system was used instead of a magnetic stirrer, the same problem would occur.6 The present invention was developed in view of the above circumstances, and the plating solution in the plating tank is filled with air due to turbulent stirring. It can be stirred uniformly and without stagnation without mixing or creating vortices, so the composite material can be uniformly and effectively dispersed in the plating solution, and the film properties can be adjusted according to the added composite material and its amount. To provide a small-sized test tank for composite plating, which can reliably and reproducibly obtain a composite plating film having the following characteristics, and thereby enable reliable evaluation of the performance and characteristics of the composite plating solution and the composite plating film obtained therefrom. With the goal.

In order to achieve the above object, the present invention contains a composite plating solution in which a composite material is dispersed, and performs composite plating on a test piece immersed in the plating solution while stirring the plating solution. In a small test chamber for plating, a floor member consisting of a flat bottom and an upwardly tapered wall connected to the outer peripheral edge of the wall is installed in a surrounding wall having a square ring shape with rounded corners or a hollow racetrack shape in cross section. To provide a small-sized test tank for composite plating characterized by a combination of the following:

■-Sato The compact test tank for composite plating of the present invention has the above-described configuration, so that the flow of the plating solution caused by the rotation of the stirrer rotor and propeller is controlled by the taper connected to the flat bottom and its outer periphery. A flow rises along the wall and flows from the bottom to the top in the test chamber, effectively preventing the generation of vortices. Since it is track-shaped and has no corners on the inner surface, the plating solution does not stagnate in the corners, and the composite material is uniformly dispersed in the plating solution and does not precipitate in the corners. The composite material is effectively used in composite plating, and a composite plating film having film characteristics commensurate with the added composite material and its amount can be reliably obtained. Therefore, according to the small-sized test tank for composite plating of the present invention, the performance and characteristics of the composite plating solution and the composite plating film obtained therefrom can be reliably evaluated.

Hereinafter, one embodiment of the present invention will be described with reference to one drawing.

〔Example〕

Figures 1 and 2 show a small test tank 1 for composite plating according to an embodiment of the present invention, which uses a stirrer rotor and is suitable for use in conducting composite plating tests in laboratories, etc. This is a test tank for composite plating with an internal capacity of 0.5 to 5Q.

This composite plating test tank 1 is composed of a tank body 2 and a floor member 3. The tank body 2 has four corners 4a.

4a, 4a, 4a consist of a peripheral wall body 4 having a generally square ring shape or a hollow racetrack shape in cross section and having a rounded inner peripheral surface, and a bottom plate 5 that closes an opening at the lower end of the peripheral wall body 4. The floor member 3 is composed of a rectangular flat bottom part 6 with rounded corners and a ring-shaped tapered wall part 7 that gradually slopes upward as it goes outward from the outer peripheral edge of the bottom part 6. The four corners of are formed as curved corners 7C that connect one side surface portion 7a and the other side surface portion 7b that are adjacent to each other with a rounded shape,
The upper ends of the four curved corners 7c, 7c, 7c, 7c are rounded to correspond to the four corners of the peripheral wall 4.

Also, one of the opposing side surfaces 7 of the tapered wall portion 7
Arc-shaped notches 8, 8 are formed in the central portions of the bottom portions 6a, 7a, thereby forming one side edge 6a of the bottom portion 6 that faces each other.

Arcuate protrusions 9, 9 facing outward are formed at the center of 6a. This floor member 3 engages with the tank body 2, and the bottoming member 3
A test tank 1 for composite plating is formed by disposing the test tank 1 on the top.

Here, the angle of the tapered wall portion 7 is 2 with respect to the bottom portion 6.
The corner portions 4a, 4a of the peripheral wall body 4 are preferably in the range of 0 to 50@, particularly around 30'.

The radius of curvature of the inner surfaces of 4a and 4a is set as appropriate depending on the size of the plating tank, but usually the radius of curvature is 10 to 30 cm,
In particular, it is formed around 20nw+. Furthermore, the radius of curvature of the circular arc-shaped protrusion 9.9 is appropriately set depending on the stirrer rotor 7 to be used.

Normal curvature radius 60-1001111. In particular, it is formed around 80 mm.

When performing a composite plating test using the above test tank 1 for composite plating, the inside of the test tank 1 is filled with a composite plating test solution in which a composite material is dispersed, and the test tank 1 is placed on the magnetic stirrer device 10. A stirrer rotor 11 is disposed in the test piece, and a test piece immersed in the composite plating solution is plated while the stirrer rotor is being rotated.

As a result, the plating liquid flow generated by the rotation of the stirrer rotor 7 rises along the tapered wall portion 7 at the bottom, forming a flow from the bottom to the top in the test chamber 1, effectively generating a vortex flow. In addition, since the inner corner of the peripheral wall 4 is not angular but rounded, smooth circulation of the plating solution is achieved without stagnation occurring in the plating solution. In addition, in the case of stirring using a stirrer rotor, it is preferable to use a rotor as large as possible and perform stirring at low rotation speed in order to prevent the generation of vortices. Since the arcuate protrusions 9, 9 are formed on the side edges 6a, 6a, a large rotor can be used.
From this point as well, vortices are less likely to occur.

Therefore, by using the above composite plating test tank 1, even if a stirring method using a stirrer rotor is adopted, air may be mixed into the plating solution in the test tank due to turbulence of stirring, or eddies may be generated. Therefore, the composite material is uniformly dispersed in the plating solution and does not settle in the corners, so the added composite material can be effectively used in composite plating and the resulting composite material can be stirred uniformly. The composite plating film has film characteristics that are certainly suitable for the added composite material, and it is possible to effectively reproduce composite plating with various types of composite materials and amounts added. Therefore, the performance of the composite plating solution and the films obtained therefrom can be evaluated without the adverse effects of the test chamber.

In the above embodiment, the tank body and the floor member are formed separately, and these are joined to form the composite plating test tank 1.
However, these may be formed integrally, and when plating is performed again, other stirring means such as propeller stirring may be used. Furthermore, various changes may be made to other configurations without departing from the gist of the present invention.

Next, the effects of the present invention will be specifically illustrated by experimental examples.

[Experiment example]

Composite plating as described in (1), (2), and (3) below was performed using a test tank for composite plating similar to that shown in Figures 1 and 2, and the amount of dispersion of the composite material in the plating solution and the plating film were measured. The eutectoid amount of the composite material inside was measured. In this case, the internal dimensions of the test chamber 1 are 170 mm x 90 nm x 120 mm, the radius of curvature of the corners 4a, 4a, 4a, 4a of the peripheral wall 4 is 30 nn, the inclination angle of the tapered wall 7 is 30'', the arcuate notches 9, 9
The radius of curvature of 80 mm was used. For comparison, the following (1
), (2).

Composite plating was performed under the same conditions as in (3), and the amount of composite material dispersed in the plating solution and the amount of eutectoid in the plating film were measured. These results are shown in Table 1.

(1) 50 g/Q of SiC fine particles with a diameter of 31 m were dispersed in a nickel sulfamate plating solution, and the pH was 4.2.
Cathode current density 3A under the conditions of temperature 45℃ and stirrer rotor (rotation diameter 36on, same below) rotation speed 5QOrpm.
Composite electrolytic nickel plating was performed at /dnf.

(2) Disperse 100 g/Q of ZrO fine particles with a diameter of 5M in a nickel sulfamate plating solution and adjust the pH to 4.0.
゜Temperature 45℃, stirrer rotor rotation speed 65Orpm
Composite electrolytic nickel plating was performed under the following conditions at a cathode current density of 3 A/drrr.

(3) 11m diameter Al1.0. Disperse 200g/Q of fine particles in Watt type nickel plating solution, pl-14,
2゜Temperature: 50℃, stirrer rotor rotation speed: 70 Or
Composite electrolytic nickel plating was performed at a cathode current density of 3 A/drrr under the conditions of pm.

The first surface plating film can be repeatedly obtained reliably and with good reproducibility, and therefore the performance and characteristics of the composite plating solution and the composite plating film obtained therefrom can be reliably evaluated.

[Brief explanation of the drawing]

Figures 1 (A), (B), and (C) show an embodiment of a small test tank for composite plating according to the present invention; (A) is a plan view;
(B) is a sectional view taken along line B-B in (A), and (C) is (
A) A sectional view taken along the line C-C in the figure, and FIG. 2 is an exploded perspective view of the same side. According to the test tank for composite plating of the present invention, even when a stirring means using a stirrer rotor or a propeller is adopted, air may be mixed into the plating solution in the test tank or eddies may be generated due to inappropriate stirring. The composite material can be stirred uniformly and without stagnation, and therefore the composite material can be uniformly dispersed in the plating solution, and the composite material has film characteristics commensurate with the added composite material 1...Small test for composite plating Tank 2... Tank body 3... Floor member 4... Surrounding wall body 6... Bottom part 7... Tapered wall part Applicant
Uemura Kogyo Co., Ltd. Agent Patent Attorney Takashi Kojima

Claims (1)

[Claims] 1. Contains a composite plating solution with composite materials dispersed inside,
In a small test tank for composite plating, in which composite plating is performed on a test piece immersed in the plating solution while stirring the plating solution, a flat bottom is installed inside the circumferential wall having a square ring shape with rounded corners or a hollow approximately racetrack shape in cross section. A small test tank for composite plating, characterized in that it is formed by engaging a floor member consisting of a floor member and an upwardly tapered wall connected to its outer peripheral edge.