Method for locally plating cadmium and gold on socket sintering assembly

Abstract

The invention discloses a method for locally plating cadmium and gold on a socket sintering assembly. The method comprises the following steps that 1) oil is removed, and cleaning is carried out; 2) weak corrosion is carried out; (3) gluing protection is carried out; (4) first-time hanging is carried out for electrochemical oil removal; (5) cadmium plating and cleaning are carried out, acid is used for weak corrosion, and the socket sintering assembly subjected to cadmium plating is passivated, and is detached; 6) the socket sintering assembly subjected to cadmium plating is coated with insulation protection glue to form an insulation glue layer on the surface of the socket sintering assembly, and second-time hanging, electrochemical oil removal, weak corrosion and nickel plating are carried out; and 7) the socket sintering assembly is put into a flash gold plating tank, and an earthy yellow uniform thin gold layer is generated on the local plating surface of the socket sintering assembly; and after gold plating, unloading and hanging are carried out, the insulation glue layer is stripped, and the socket sintering assembly is soaked with an X-1 diluent solution, cleaned and then is naturally dried. The method is low in manufacturing cost, simple in process, and easy and convenient to operate, and an obtained plating layer has the gold content capable of reaching 99.99%, is fine in crystals, good in binding force, and controllable in plating layer thickness, can effectively save precious metal, and has good electric contact plugging performance, welding performance and corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a method for partial cadmium and gold plating of socket sintered components. Background technique [0002] The socket sintered component is the core component of the oil-tight shielded socket. The socket sintered component is sintered by the glass sealing process such as the outer body, the terminal rod, and the shielded inner sleeve. The base material of the outer body, the terminal rod, and the shielded inner sleeve is Glass-sealed alloy; between the terminal rods, between the terminal rods and the shielded inner casing, and the outer body are insulated and sealed structures, and the socket sintered components need to be connected on both sides, and one end needs to be connected to the outside; the other end of the terminal rod , The shielding inner casing needs to be welded with the cable core and shielding layer. In order to ensure the performance of the sock...

AI Technical Summary

Problems solved by technology

The disadvantage of the prior art is that when using thin copper wires for binding, because the terminal rod is in the depression inside the outer body, the space is narrow, and the operator’s fingers cannot enter to bind the copper wire at the root of the terminal rod, which is difficult to bind. In the subsequent electroplating process Due to force and other reasons, it is easy to cause the wire to fall off, and there will be bottom leakage after gold plating.

The cost of making plastic clamps is high, and the repeated utilization rate is low. At the same time, the component is sintered by sintering process. There is a certain tolerance in the position of the terminal rod and shielding tube, and some parts are difficult to clamp.

During the partial gold plating process, the cadmium plating layer is affected by factors such as the destruction of the protective layer and the load bearing of the clamping, causing the cadmium plating passivation film to bloom. At the same time, the electroplating process also has a certain impact on the airtightness and insulation performance of the socket sintered components.

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