JPS5964760A - Titanium material with lead coating - Google Patents

Abstract

PURPOSE:To enable lead coating to a titanium material to make it possible to use said material as electric parts or an electric material, by a method wherein a different metal plating layer is formed to the surface of the titanium material and a lead coating layer is formed to the outer surface of said plating layer in a closely adhered state. CONSTITUTION:Sand blast treatment is applied to the surface of a plate shaped or a lump shaped titanium material and remove the passivation coating strongly adhered to the surface thereof. Subsequently, the treated titanium material is immersed in an electrolytic solution such as hydrochloric acid to perform cathodic electrolytic treatment and the slight passivation coating formed after the sand blast treatment is removed. In the next step, a different kind of a metal is used as an anode while the titanium material is used as a cathode to apply DC voltage therebetween and different metal plating is performed for a predetermined time. Thereafter, the plated titanium material is taken out from the electrolytic solution and lead coating processing is applied to the outer surface of the plating layer.

Description

[Detailed Description of the Invention] The present invention is based on Table 1111, which has been subjected to lead coating processing. Regarding 11.

Titanium materials are used for special purposes such as aviation docks due to their extremely superior properties due to the non-deteriorating coating on their surfaces, their monolithic properties, and the strength and strength of the titanium phase material itself. It is being

However, if we look at the electrical properties, we can see that the defects that form on the surface in the air, etc. Due to the IIIJI island coating, it has extremely poor electrical conductivity, and therefore, unlike copper, eyes, etc., it has the disadvantage that it cannot be used as electrical parts, materials, etc.

In order to eliminate this drawback, the surface of the titanium material is coated with lead.11. Rubbing can be considered.

However, if you want to perform lead coating on titanium surface I, you will need to use the titanium material as specified. It is necessary to melt the lead in the form of rods, plates, etc. on the surface of the titanium material by heating it to 11 degrees Celsius.
Even while the surface is being melted, an immobile film is often formed on the surface of the material.

Therefore, it is impossible to perform lead coating on the surface of titanium material.

misfire] is pure V)ζ on the surface of titanium, pure ill]6
'sa1-y1de) By forming a Jj metal plating layer and applying lead coating to the outer surface of the dissimilar gold plating layer,
It is possible to overcome the two drawbacks by using titanium metal as electrical parts and interconnections between them.
DESCRIPTION OF THE PREFERRED EMBODIMENTS A detailed description will be given below with reference to the accompanying drawings showing examples.

Fig. 1 is a partially cutaway enlarged perspective view of a titanium material coated with lead, in which dissimilar gold J1u5 nosoki I+'r f 2 of a predetermined thickness is placed on the surface of the titanium material +1+ as a core support.
) is made of cedar, and the outer surface 1 [11] of the group 4 A: f 6 milled plating layer (2) is covered with lead and a 1゛゛〆1 (3) sound is formed.

Figure 2 is a block diagram showing the process of applying lead coating to titanium with a width of 1' = 1. Sandblasting is performed on the surface of a plate-shaped or block-shaped titanium cover (1). As a result, the strong passivation layer formed on the Chikun'i Uchigori Ifll is removed, and then the Chikun material (1) is immersed in an electrolytic solution such as hydrochloric acid to perform a single polar electrolytic treatment. , the slight immovable island coating formed after the sandblasting process is removed. Then, after removing a small amount of the immobile j' and the membrane, immediately apply a bending voltage to the titanium material using the metal k as an anode and the titanium material as a single pole, and plate one of the prescribed four metal metal strings. Let's do it. After that, titanium paulownia plated with t+x plating was extracted from the electrolytic solution, and lead was removed! /
'tM processing is applied.

In this way, there will be no formation of an inorganic film between the titanium surface and the plated layer of different gold powder, and it will be possible to easily and logically perform the lead force Ω process. .

(Implementation I!/111) Figure 3 shows an enlarged microscopic photograph of a piece of chikun powder that has been subjected to pure iron plating and lead coating IQ processing.

(Example 2) Pure copper was used as the dissimilar metal.

Figure 4 shows an enlarged microscopic photograph of a cut piece of pure copper-plated and lead-plated material.

In addition, Fig. 3 C2 Fig. 4 a shows the island of Q month υ (the song has been buffed and not etched), and Fig. 3 C2 and Fig. 4 1) show the island where only the d'i portion is lactic acid. Fig. 3C2 and Fig. 4C show 1g in which only the lead part was etched with acetic acid, and Section 3 d and >β4 Fig. d show the lead part etched with lactic acid and the titanium part etched with Keller etching. Figures 1, 3e and 4e show the titanium parts etched with Keller's solution; Figure 3C
2 Figure 4 f is along 1113 minutes f'? +: Indicates that the titanium part was etched with Keller's solution using acid.

The mechanical strength of the titanium width 1.0 mm obtained as described above was measured in the following manner. That is, a titanium round bar (1
After forming a pure iron plating layer or pure copper plating layer at a predetermined position k between the surfaces of ), and forming a lead coating layer (3) with a predetermined thickness t on the length,
The titanium round bar (1) is supported by the jig (4) and the speed is 101/min.
The measurement was carried out by moving the titanium round bar (1) toward the jig (4) at a speed of mn (see FIG. 5).

The results are shown in the table below.

Here, the adhesion strength is the maximum shearing load divided by the surface strength of the lead coating, and the pullback strength of the lead itself is 1.20 to 1.40 k.
It can be seen that it is significantly larger than g/mar.

Similar to actual M1j, in Example 1, the pure iron plating layer is not exposed at all in the sheared part, and in Example 2, the pure copper plating layer is only partially exposed, so the actual dense Mk
The strength is 1. It seems to be a strange thing.

To 1), this result is thought to be due to the difference in IWJ between the titanium round bar and the jig.

-The primary wood grain j is not limited to the above embodiments, for example, a method of immersing it in sulfuric acid etc. may be adopted as the Table 1111 treatment of titanium compatible, and the plating layer may be tin ( Of course, it is also possible to use a plating layer such as tin) or silver.

Titanium has the unique effect of being used as an electrical component, material, etc.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view of a lead-coated Dikushi material, Fig. 2 is a process diagram, Figs. 3 and 4 are micrographs showing an example of the present invention, and Fig. 5 is a Maximum shear load measuring device. Side view of the kidney. Figure 6 is an oscillograph obtained by measuring the maximum shear load. 1... Titanium, 2... Alien gold, i-high plating layer, 3... Homogen lead coating layer. Departing person + Be, 0 direction valve A type Kuraneko A parent person Kaihata Misaki stick l and Kano ＾ Nuta 1st figure 2 figure J diagramming 5°, s figure b 383- t＼pu qth figure b ′th? -Figure O

Claims (1)

[Claims] ■, Titanium (forms a different metal plating layer on the surface of the material,
A dark blue titanium alloy coated with lead, characterized in that 78 layers of lead coating are densely formed on the outer surface of the dissimilar gold plated layer.