JPS5913252Y2 - Electrode support member for electroplating - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an electrode support member for electroplating.

In general, an electrode support member in a continuous electroplating line, particularly in a horizontal line, has the function of holding the electrode stationary thereon in the plating solution and supplying current to the electrode through it.

Therefore, the characteristics required of such an electrode support member are (1) corrosion resistance against plating solution;
) It does not dissolve even if a positive electrode potential is applied in the plating solution;
(3) Good conductivity, etc.

However, in the past, metals such as Pb and Ti have been used as coating materials for electrode support members for electroplating, but when Pb is used as a coating material for electrode support members, the potential of the positive electrode is reduced in the plating solution. When given, PB gradually dissolves, and the properties of the plating film obtained from this plating solution, such as appearance, corrosion resistance, and chemical conversion treatment properties, deteriorate.
When Ti is used as a covering material for an electrode support member, the above three properties are almost satisfied, but there is a problem due to the characteristics of Ti, that is, when a positive electrode potential is applied, the electrode and electrode support member The Ti surface that is not in contact with the electrode becomes passivated at the part, and the amount of electricity supplied increases or decreases, causing the inconvenience that when the potential fluctuates, the passivation film is destroyed and sparks are generated.

This spark causes local pitting corrosion, which increases the number of times the electrode support member must be repaired.

The present invention has been developed in view of the problems of the conventional electrode support members mentioned above.
An object of the present invention is to provide an electrode support member for electroplating that has corrosion resistance against a plating solution, does not dissolve even when a positive electrode potential is applied in the plating solution, has good conductivity, and has arc resistance.

The feature of the electrode support member for electroplating according to the present invention is that the electrode support member conducts electricity to the electrode for electroplating and supports it, and is in contact with the electrode for plating of the material metal of the support member. The reason is that a metal carbide layer is formed on the surface.

The material metal of the electrode support member for electroplating according to the present invention is C.
WC, Tic, ZrC, etc. can be used as the metal carbide, and one or more of these can be used, and this coating layer has about Thermal spraying, especially plasma spraying, is suitable for coating the metal carbide, but it is also possible to coat the target metal carbide on the raw metal by plating, etc. Carburizing can also be performed to form a metal carbide layer.

Next, the electrode supporting member for electroplating according to the present invention will be specifically explained using an example shown in the drawings.

The accompanying drawing is an explanatory view of a partial cross section of an electrode support member for electroplating according to the present invention.

That is, the metal carbide layer 1 is formed by thermal spraying or the like on the surface of the electrode support member material metal 3 that is in contact with the electroplating electrode 2, and the metal carbide layer 1 of the electrode support member material metal 3 is also formed. A lining 4 made of synthetic resin, rubber, or the like is provided on the other surfaces to provide electrical insulation and to prevent the metal 3 of the electrode support member from being eroded by the plating solution.

An embodiment of the electrode support member for electroplating according to the present invention having such a configuration will be described in comparison with a comparative example.

The material to be coated on the metal material of the electrode support member was formed on the surface of the metal material by thermal spraying.

The results are shown in the table below.

As is clear from this table, the electrode support member according to the present invention does not elute harmful electrode support member material metal into the plating solution and does not cause pitting corrosion.
The service life of the electrode support member is increased, and the quality of the product is further improved.

As explained above, since the electrode supporting member for electroplating according to the present invention has the above structure, it has good electrical conductivity and does not cause pitting corrosion even if an arc occurs. As a result, the number of repairs to the electrode support member can be significantly reduced, resulting in an improvement in basic unit consumption.Furthermore, the quality of the resulting product is improved because harmful metal ions from the material metal of the electrode support member are not eluted into the plating solution. It is something.

[Brief explanation of the drawing]

The accompanying drawing is an explanatory view of a partial cross section of an electrode support member for electroplating according to the present invention. 1 - Metal carbide layer, 2 - Electrode, 3 - Electrode support member material metal, 4 - Lining of resin or rubber.

Claims (4)

[Scope of utility model registration request] (1) An electrode support member that energizes and supports an electroplating electrode, characterized in that a metal carbide layer is formed on the surface of the support member material metal that is in contact with the plating electrode. Electrode support member for electroplating. (2) The electrode support member for electroplating according to claim 1, wherein the material metal is Cu. (3) The electrode support member for electroplating according to claim 1 or 2, wherein the metal carbide is one or more selected from the group of TiC, WC, and ZrC. (4) The electrode support member for electroplating according to claim 3, which is formed by thermally spraying a metal carbide layer onto the metal surface of the support member material.