JPH0790681A - Energizing roll for electroplating - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a novel energizing roll with excellent corrosion resistance and wear resistance, and low surface electrical resistance. [Constitution] The electroplating roll for electroplating is Al:
5 to 20% and one or two of Mo, Nb, V
For seeds and above, Mo: 1 to 20%, Nb: 1 to 30%, V:
It is composed of a material having a composition containing 1 to 10% and the balance being substantially Ti.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electroplating roll for electroplating.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 1, the plating treatment of a galvanized steel sheet is performed by using a roll 100 and an energizing roll 102 to coat a material 104 to be plated with a plating solution 10.
6 and then a voltage is applied between the energizing roll 102 as a cathode and the plating source 108 as an anode to deposit a plating component such as Zn on the material 104 to be plated in the plating solution 106. There is.

The current-carrying roll has a high corrosion resistance, a high wear resistance, and a high surface resistance because it is immersed in a highly corrosive plating solution containing an acid, and is constantly in contact with the material to be plated and energized. Low electrical resistance is required. For this reason, Ni-based alloy materials containing a large amount of Cr, Mo, etc. have heretofore been widely used as such energizing rolls.

However, in recent years, the quality of plating materials has increased,
With the increase in complexity, the plating solution composition and plating conditions have become more severe,
In some cases, conventional Ni-based alloys are insufficient in terms of corrosion resistance and wear resistance.

[0005]

Therefore, the inventors of the present invention have completed the present invention while paying attention to a Ti-based alloy having a high corrosion resistance and a high strength, examining the possibility of applying it to a current-carrying roll, and conducting various studies. Let Thus, the gist of the present invention is that it contains Al: 5 to 20% by weight and contains 1% of Mo, Nb and V.
Seed or 2 or more types Mo: 1-20%, Nb: 1-3
0%, V: 1-10%, with the balance being essentially Ti
The purpose of the present invention is to form an energizing roll with a material having a composition of

The current-carrying roll of the present invention precipitates the β phase in order to overcome the brittleness of the α phase (Ti ₃ Al) having excellent mechanical properties at room temperature, and improves the hardness and strength. It is characterized by containing Al which is an α-phase stabilizing element and Nb, Mo and V which are β-phase stabilizing elements. In particular, the addition of Nb, which is a β-phase stabilizing element, is highly effective in improving corrosion resistance.

The current-carrying roll of the present invention has excellent corrosion resistance, wear resistance, and low surface electrical resistance, and can be used even under severe plating conditions, which are insufficient with conventional electrode materials made of Ni-based alloys. is there.

Next, the specific reasons for limiting each component will be described in detail below. [Reason for limitation] Al: Addition of 5% or more is necessary to secure mechanical strength, but if added in a large amount, toughness decreases, so 20
% Or less. Mo, Nb, V: Mo, Nb, V in order to secure a predetermined brittle resistance
It is necessary to add one or more of Nb and V. However, since the effect is small even if added more than necessary, Mo
About 1 to 20%, Nb about 1 to 30%, V
Is about 1 to 10%.

[0009]

EXAMPLES In order to further clarify the characteristics of the present invention, examples thereof will be described in detail below. A Ti-based alloy having the composition of components shown in Table 1 was melted and forged to be processed into a predetermined shape, and various characteristic evaluation tests required for an energizing roll were conducted. Further, for the purpose of comparison, a similar test was conducted on a Ni-based alloy that has been conventionally used. The results are shown in Table 1.

[0010]

[Table 1]

However, the values of the electro-corrosion resistance in Table 1 are the measured values of the weight reduction amount due to the corrosion due to the energization of the energizing roll in the sulfuric acid-iron sulfate simulating liquid for 8 hours under pulse energization. The smaller this value is, the higher the corrosion resistance is.

Comparative Example 1 in the table is formed into a predetermined shape by HIP processing, and Comparative Example 2 is formed into a predetermined shape by forging.

From the results shown in Table 1, the current-carrying rolls of the examples have a low density and a light weight, have a higher strength than the conventionally used electrode materials made of a Ni-based alloy, are excellent in abrasion resistance and are resistant to current-corrosion. Also, it can be seen that the surface electric resistance value is also extremely low.

The embodiment of the present invention has been described in detail above, but this is merely an example, and the present invention is applied when manufacturing a roll-shaped electrode by various processing methods such as HIP treatment of powder, casting, forging and rolling. The present invention can be carried out in a mode in which various modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the invention.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a method for plating a material to be plated using an energizing roll.

[Explanation of symbols]

 100 roll 102 energizing roll 104 plated material 106 plating liquid 108 plating source

Claims (1)

[Claims] 1. An amount of Al: 5 to 20% by weight and one or more of Mo, Nb and V Mo: 1 to 20% Nb: 1 to 30% V: 1 to 10% A current-carrying roll for electroplating, characterized in that it is formed from an alloy containing the above and the balance being substantially Ti.