WO2018092653A1

WO2018092653A1 - Braided wire

Info

Publication number: WO2018092653A1
Application number: PCT/JP2017/040234
Authority: WO
Inventors: 健介山田; 大塚　保之; 田口　欣司; 清水　亨; 末谷　正晴; 裕隆馬場; 武史清水
Original assignee: 株式会社オートネットワーク技術研究所; 住友電装株式会社; 住友電気工業株式会社
Priority date: 2016-11-18
Filing date: 2017-11-08
Publication date: 2018-05-24

Abstract

Provided is a braided wire (1) having good abrasion resistance. The braided wire (1) has a plurality of knitted strands (2). The shape of the braided wire (1) is cylindrical. The strands (2) each have: a strand main body (20) composed of an aluminum wire or aluminum alloy wire; and an abrasion-corrosion-inhibiting coating (21) covering the outer circumferential surface of the strand main body (20). The abrasion-corrosion-inhibiting coating (21) may be composed of a chemical conversion coating or alumite coating. When the abrasion-corrosion-inhibiting coating (21) is the alumite coating, the braided wire (1) may have a conductive layer (22) covering the outer surface of the abrasion-corrosion-inhibiting coating (21).

Description

Braided wire

The present invention relates to a braided wire.

Conventionally, a braided wire formed in a tubular shape by knitting a plurality of strands is used in a wire harness used in a vehicle such as an automobile. As a strand constituting this type of braided wire, for example, as described in Patent Document 1, a copper-based strand mainly composed of copper such as a bare annealed copper wire, an oxygen-free annealed copper wire, and a tin-plated annealed copper wire is available. Has been used.

In recent years, in order to reduce the weight of wire harnesses, the use of aluminum-based wires mainly composed of aluminum instead of copper-based wires has been studied.

JP 2015-18756 A

However, aluminum has a higher coefficient of friction than copper. For this reason, a braided wire made of an aluminum-based wire has poor wear resistance compared to a braided wire made of a copper-based wire. Therefore, the braided wire made of an aluminum-based wire may be worn due to vibration applied during use such as when the vehicle is running, and may eventually break.

The present invention has been made in view of the above background, and intends to provide an aluminum-based braided wire having good wear resistance.

One aspect of the present invention is a tubular braided wire having a plurality of braided strands,
The strand is composed of an aluminum wire or an aluminum alloy wire, a rubbing corrosion inhibiting film covering the outer peripheral surface of the strand main body,
Having a braided wire.

The braided wire has a strand main body portion in which the strands constituting the braided wire are made of an aluminum wire or an aluminum alloy wire, and a fretting corrosion inhibiting film covering the outer peripheral surface of the strand main body portion. Yes. For this reason, the braided wire suppresses the fretting corrosion of the wire main body portion by the fretting corrosion inhibiting film even when vibrations are applied to the braided wire when the vehicle is running and the knitted strands rub against each other. It becomes possible to prevent wear of the wire main body part that leads to disconnection. Therefore, according to the braided wire, an aluminum braided wire having good wear resistance can be obtained.

1 is an external view schematically showing a braided wire of Example 1. FIG. It is the figure which showed typically the II-II line cross section in FIG. It is the figure which showed typically the cross section of the strand which comprises the braided wire of Example 1. FIG. It is the figure which showed typically the cross section of the strand which comprises the braided wire of Example 3. FIG.

The braided wire is formed by knitting a plurality of strands into a cylindrical shape. In the braided wire, the strand has a strand body portion and a fretting corrosion inhibiting film.

The strand main body is composed of an aluminum wire or an aluminum alloy wire. Specific examples of the aluminum alloy include a 1000 series Al alloy, a 3000 series Al alloy, a 5000 series Al alloy, a 6000 series Al alloy, and a 7000 series Al alloy. In the braided wire, the strand main body portion of each strand may be made of the same material, or the strand body portion of each strand may be made of a different material.

The aluminum alloy constituting the aluminum alloy wire may have a tensile strength of 200 MPa or more and a conductivity of 50% IACS or more. According to this configuration, since the strength and conductivity of the wire main body portion are increased, combined with the formation effect of the fretting corrosion inhibiting film, the braided wire that is easy to improve wear resistance due to vibration while ensuring good shielding performance. Is obtained. The tensile strength is preferably 210 MPa or more, more preferably 220 MPa or more, from the viewpoint of improving wear resistance due to vibration. The tensile strength can be set to, for example, 280 MPa or less, preferably 270 MPa or less, and more preferably 260 MPa or less from the viewpoint of ensuring conductivity. The conductivity is preferably 52% IACS or more, more preferably 54% IACS or more, from the viewpoint of facilitating securing of good shielding performance. The tensile strength can be, for example, 58% IACS or less, preferably 57% IACS or less, and more preferably 56% IACS or less, from the viewpoint of improving wear resistance due to vibration. The chemical composition of the aluminum alloy having the tensile strength and the electrical conductivity is, for example, mass%, Mg is 0.1% or more and 1.5% or less, and Si is 0.03% or more and 2.0%. Hereinafter, chemical composition containing 0.05% or more and 0.5% or less of Cu, the balance being Al and inevitable impurities, and the mass ratio Mg / Si of Mg and Si being 0.8 or more and 3.5 or less Can be illustrated. The chemical composition may further contain at least one element by mass% of Fe of 0.1% to 1.0% and Cr of 0.01% to 0.5%. it can. The chemical composition may further contain at least one element of Ti of 500 ppm or less and B of 50 ppm or less by mass ratio.

The scratch corrosion inhibiting coating covers the outer peripheral surface of the wire main body. Specifically, the fretting corrosion-inhibiting film can be configured to cover at least the outer peripheral surface of the strand main body at a portion where a plurality of braided strands contact each other. The fretting corrosion-inhibiting film preferably covers the entire outer peripheral surface of the strand main body from the viewpoint of ensuring the effect of improving the wear resistance and improving the reliability of the wear resistance.

The fretting corrosion inhibiting film is a film for inhibiting the fretting corrosion of the wire main body due to the rubbing of the wires due to the vibration of the braided wire. Specifically, the fretting corrosion inhibiting film can be composed of a chemical conversion film or an alumite film (anodized film). According to this configuration, the above-described operational effects can be ensured.

More specifically, when the fretting corrosion inhibiting film is composed of a chemical conversion film, the friction coefficient of the surface of the wire is reduced compared to the bare aluminum-based wire, and it becomes easy to improve the slipping property between the wires. It becomes easy to suppress the abrasion corrosion mentioned above. Therefore, in the above case, it is easy to obtain a braided wire that is advantageous for improving wear resistance. Moreover, the improvement of the slipperiness between strands makes it easy to increase the line speed in the braiding process when manufacturing the braided wire. Therefore, in the above case, it is easy to obtain a braided wire that is advantageous for improving mass productivity. In the above case, since the film thickness of the fretting corrosion inhibiting film can be made thinner than the plated film or the like, it is advantageous in reducing the diameter of the strand and reducing the weight of the braided wire. Moreover, a chemical conversion film is easy to ensure electroconductivity. Therefore, in the above case, a braided wire that can easily secure the shielding performance is obtained.

On the other hand, when the fretting corrosion-inhibiting film is composed of an alumite film, a hard fretting corrosion-inhibiting film is formed on the outer peripheral surface of the wire main body portion, so that the above-mentioned fretting corrosion can be easily suppressed. Moreover, an alumite film is easy to obtain sufficient film thickness compared with a chemical conversion film. Therefore, in this case, it becomes easy to obtain a braided wire that is advantageous for improving wear resistance.

The braided wire may be composed of a strand having a fretting corrosion-inhibiting film made of a chemical conversion film, or may be composed of a strand having a fretting corrosion-inhibiting film made of an alumite film, or both It may be composed of the element wire.

The chemical conversion film can be formed by performing a chemical conversion treatment on the outer peripheral surface of the strand main body. Specifically, as the chemical conversion film, for example, a Cr-containing film, a Zr-containing film, a Ti-containing film, a phosphate-containing film, and the like can be used. According to this configuration, the above-described operational effects can be ensured. Specifically, the Cr-containing film can be constituted by, for example, a chromate film (including a phosphoric acid chromate film). The chromate film can be formed by subjecting the outer peripheral surface of the strand main body portion to chromate treatment. Specifically, the Zr-containing film and the Ti-containing film can be composed of, for example, a non-chromate film that contains Zr and / or Ti and does not contain chromium. The non-chromate film can be formed by non-chromating the outer peripheral surface of the wire main body. The phosphate-containing film can be formed by subjecting the outer peripheral surface of the strand main body portion to a phosphate treatment.

Specifically, the film thickness of the chemical conversion film can be 10 nm or more and 150 nm or less. According to this configuration, the above-described operational effects can be ensured. The film thickness of the chemical conversion film is preferably 25 nm or more and 125 nm or less, and more preferably 50 nm or more and 100 nm or less.

On the other hand, the alumite film can be formed by subjecting the outer peripheral surface of the wire main body to an anodizing treatment.

Specifically, the film thickness of the anodized film can be 10 μm or more and 150 μm or less. According to this configuration, the above-described operational effects can be ensured. The film thickness of the alumite film is preferably 25 μm or more and 125 μm or less, and more preferably 50 μm or more and 100 μm or less.

When the scratch corrosion inhibiting film is an alumite film, the braided wire may further include a conductive layer that covers the outer surface of the scratch corrosion inhibiting film. An alumite film is inferior in conductivity compared to a chemical film such as a chromate film. Therefore, according to the above configuration, it is possible to obtain a braided wire that can easily ensure shielding performance by ensuring conductivity by the conductive layer while suppressing abrasion corrosion by the abrasion corrosion inhibiting film made of an alumite film.

As the conductive layer, a metal (including alloy) layer such as a plating layer can be exemplified as a suitable one. Specific examples of the conductive layer include a Sn plating layer, a Sn alloy plating layer, an Ag plating layer, an Ag alloy plating layer, an Au plating layer, and an Au alloy plating layer. Note that the conductive layer can be composed of one layer or two or more layers.

Specifically, the thickness of the conductive layer can be 1 μm or more and 30 μm or less. According to this configuration, the above-described operational effects can be ensured. The film thickness of the conductive layer is preferably 5 μm or more and 25 μm or less, and more preferably 10 μm or more and 20 μm or less.

The above braided wire can be suitably used in a vibration environment. In this case, the above-described operational effects can be sufficiently exhibited.

The braided wire can be suitably used for vehicles. Specifically, for example, the braided wire can be applied to a vehicle wire harness. More specifically, the braided wire can be used so as to cover the outer periphery of the vehicle wire harness. Moreover, the said braided wire can be used so that the outer periphery of the 1 or 2 or more electric wire which comprises the wire harness for vehicles may be covered. Further, the braided wire can be used so as to be disposed between the conductor of the electric wire constituting the vehicle wire harness and the insulator so as to cover the conductor. Examples of the vehicle include an automobile, a train, a train, and a motorcycle.

In addition, each structure mentioned above can be arbitrarily combined as needed, in order to obtain each effect mentioned above.

Hereinafter, the braided wire of the embodiment will be described with reference to the drawings.

Example 1
The braided wire of Example 1 will be described with reference to FIGS. As shown in FIGS. 1 to 3, the braided wire 1 of this example has a plurality of strands 2 knitted. The shape of the braided wire 1 is cylindrical. In addition, in FIG. 2, each strand 2 is abbreviate | omitted.

The strand 2 has a strand body portion 20 made of an aluminum wire or an aluminum alloy wire, and a fretting corrosion inhibiting film 21 that covers the outer peripheral surface of the strand body portion 20. In this example, the fretting corrosion inhibiting film 21 is specifically a chemical conversion film. More specifically, the chemical conversion film is a chromate film that is one of Cr-containing films.

(Example 2)
The braided wire of Example 2 will be described. In the braided wire 1 of this example, the fretting corrosion inhibiting film 21 is specifically an alumite film. Other configurations are the same as those of the first embodiment.

(Example 3)
The braided wire of Example 3 will be described with reference to FIG. As shown in FIG. 4, the braided wire 1 of this example includes a strand main body portion 20 in which the strand 2 is made of an aluminum wire or an aluminum alloy wire, and a fretting corrosion covering the outer peripheral surface of the strand main body portion 20. It has a suppression film 21 and a conductive layer 22 that covers the outer peripheral surface of the fretting corrosion suppression film 21. In this example, the fretting corrosion inhibiting film 21 is specifically an alumite film. The conductive layer is specifically a Sn plating layer or a Sn alloy plating layer. Other configurations are the same as those of the first embodiment.

Hereinafter, a braided wire sample was prepared and evaluated. An experimental example will be described.

<Experimental example>
(Preparation of braided wire)
After degreasing the outer peripheral surface of an Al alloy wire made of a 1000 series Al alloy having a diameter of 0.26 mm, a chromate treatment solution (Nihon Parkerizing Co., Ltd., “Palcoat 3700”, containing Cr) was used for 2 minutes at a temperature of 60 ° C. Chromate treatment was performed under the treatment conditions and washed with water. Thus, a coated wire having a strand main body portion made of an aluminum alloy wire and a chemical conversion coating (specifically, a chromate coating, a film thickness of 50 to 100 nm) covering the outer peripheral surface of the strand main body portion ( 1) was prepared.

The outer peripheral surface of an Al alloy wire made of a 1000 series Al alloy having a diameter of 0.26 mm was desmutted, and then anodized under a treatment condition of 20 to 25 ° C. for 30 minutes. Thereby, the strand (2) with a film | membrane which has the strand main body part comprised from an aluminum alloy wire and the alumite film | membrane (film thickness of 30 micrometers) which covers the outer peripheral surface of a strand main body part was prepared.

After depositing Zn as a base on the surface of the coated wire (2), Sn plating was performed using an electroplating method (voltage 0.3 V, current 0.13 A). Thereby, the strand (3) with a film | membrane and a conductive layer which further has a conductive layer (thickness 2 micrometers) comprised from the Sn plating layer which covers the outer peripheral surface of an alumite film | membrane was prepared.

An Al alloy wire having a diameter of 0.26 mm made of an improved Al alloy satisfying the above-described chemical composition and having a tensile strength of 200 MPa or more and a conductivity of 50% IACS or more was prepared. After degreasing the outer peripheral surface of the Al alloy wire, chromate treatment is performed using a chromate treatment solution (Nihon Parkerizing Co., Ltd., “Palcoat 3700”, containing Cr) at a temperature of 60 ° C. for 2 minutes, and washed with water. did. Thus, a coated wire having a strand main body portion made of an aluminum alloy wire and a chemical conversion coating (specifically, a chromate coating, a film thickness of 50 to 100 nm) covering the outer peripheral surface of the strand main body portion ( 4) was prepared.

A braided wire of Sample 1 was obtained by weaving a plurality of coated wires (1) into a cylindrical shape. A braided wire of Sample 2 was obtained by weaving a plurality of coated wires (2) into a cylindrical shape. A braided wire of Sample 3 was obtained by weaving a plurality of strands (3) with a film / conductive layer into a cylindrical shape. A braided wire of Sample 4 was obtained by weaving a plurality of coated wires (4) into a cylindrical shape.

A braided wire of Sample 1C was obtained by weaving a plurality of Cu strands having a diameter of 0.26 mm into a cylindrical shape. A braided wire of Sample 2C was obtained by braiding a plurality of Al alloy wires made of 1000 series Al alloy having a diameter of 0.26 mm into a cylindrical shape. A braided wire of Sample 3C was obtained by braiding a plurality of Al alloy wires made of a 6000 series Al alloy having a diameter of 0.26 mm into a cylindrical shape. A braided wire of Sample 4C was obtained by braiding a plurality of Al alloy wires made of the improved Al alloy having a diameter of 0.26 mm into a cylindrical shape. Note that the braided configuration of each of the produced braided wires was 44 for strikes and 4 for the number of strikes. In this experimental example, the length of each braided wire in the longitudinal direction was 1 m.

(Dynamic friction coefficient)
About each braided wire, the dynamic friction coefficient of the strand which comprises each braided wire was measured as follows. That is, one strand was fixed straight on an iron flat plate. Next, a 100 g weight was placed on the strand, the weight was swept in the strand axis direction at a sweep speed of 50 mm / min, and the frictional force at that time was measured. Next, a dynamic friction coefficient was calculated from a calculation formula of F = μN (where F: friction force, μ: dynamic friction coefficient, N: vertical drag).

(Vibration test)
The disconnection rate when the braided wire was vibrated 1 million times with a constant strain (specifically, a strain of 0.005) was confirmed. In addition, the disconnection rate was calculated | required from the calculation formula of 100x (number of disconnected wires) / (total number of strands). The case where the disconnection rate was 10% or less was designated as “A +” as having excellent wear resistance. A case where the disconnection rate was more than 10% and 15% or less was designated as “A” as having good wear resistance. The case where the disconnection rate was more than 15% and 20% or less was designated as “B” as having a certain degree of wear resistance. The case where the disconnection rate was more than 20% was designated as “C” because it was inferior in wear resistance. In addition, this vibration test was implemented about each produced braided wire.

(Shield performance)
Three insulated electric wires having a length of 1000 mm were inserted into a braided wire cylinder to prepare a sample. And the shielding performance of the sample was measured by the absorption clamp method. The measuring device used for the absorption clamp method has a spectrum analyzer, a tracking generator, a pair of shield boxes, an absorption clamp, and a termination resistor. Each shield box is connected to ground. The absorption clamp is disposed between the pair of shield boxes. The termination resistor is provided in one shield box of the pair of shield boxes, and is grounded through the one shield box. The spectrum analyzer is connected to an absorption clamp and configured to measure a signal received by the absorption clamp. For the absorption clamp, “KT-10” manufactured by Kyoritsu Electronics Co., Ltd. was used. In addition, “E4402B” manufactured by Agilent was used as the spectrum analyzer.

The sample was attached according to the following procedure. First, the sample was passed inside the absorption clamp, and both ends were fixed in the shield box. Next, both ends of the braided wire were connected to each shield box, and the braided wire was grounded via the shield box. Next, the wire conductor of the sample inserted in one shield box was connected to the termination resistor, and grounded via the termination resistor. Thereafter, the sample wire conductor inserted into the other shield box was connected to the tracking generator.

After attaching the sample to the measuring device, a 10 MHz high frequency signal generated from the tracking generator was input to the wire conductor. Then, the high frequency signal leaked to the outside of the sample was received by the absorption clamp, and the magnitude of the high frequency signal leaked by the spectrum analyzer was measured. Thereafter, the ratio of the leaked high-frequency signal to the magnitude of the input high-frequency signal was calculated, and this was used as the induction noise amount (dB). The case where the amount of induced noise was 40 dB or more was defined as “C”. A case where the amount of induced noise was more than 31 dB and 39 dB or less was defined as “B”. The case where the amount of induced noise was more than 25 dB and not more than 30 dB was defined as “A−”. The case where the amount of induced noise was more than 20 dB and 25 dB or less was defined as “A”. A case where the amount of induced noise was 20 dB or less was defined as “A +”.

(Slippery)
For each braided wire, a braided knitting process test (300 m braided knitting) was carried out at the same linear velocity (linear velocity) as during mass production of a braided wire composed of Cu strands. In the braid knitting process test, the case where no kink or disconnection occurred was designated as “A” as being excellent in slipperiness. Although kink and disconnection did not occur, a case where a part of the knitting was disrupted was designated as “B” because the slipperiness was good. The case where kink or wire breakage occurred was designated as “C” because the slipperiness was poor.

The above evaluation results are summarized in Table 1.

According to Table 1, the following can be understood. The braided wire of the sample 1C is a braided wire made of a copper-based strand. The braided wires of Sample 2C to Sample 4C are braided wires made of bare aluminum-based strands. As shown in Table 1, the dynamic friction coefficient of the bare aluminum wire is larger than the dynamic friction coefficient of the copper wire. Therefore, the braided wires of Sample 2C to Sample 4C were not able to suppress the fretting corrosion of the strands due to vibration compared to the braided wire of Sample 1C, and the strands were broken. Thus, it cannot be said that the braided wires of Sample 2C to Sample 4C have better wear resistance than the braided wire made of copper-based strands.

On the other hand, the braided wires of Samples 1 to 4 all have a fretting corrosion-inhibiting film (specifically, Sample 1 and Sample 4 are chemical conversion coatings) on the outer peripheral surface of the wire main body composed of aluminum alloy wires. Sample 2 and Sample 3 are covered with an alumite film). For this reason, the braided wires of Sample 1 to Sample 4 are such that even when the strands are rubbed by vibration, the strand main body portion is suppressed by the fretting corrosion-inhibiting film and the strand main body portion is suppressed from being scratched. Was able to prevent wear. Therefore, according to the braided wires of Samples 1 to 4, it was confirmed that aluminum-based braided wires having good wear resistance can be obtained.

Consider further. The strands in the braided wires of Samples 1 and 4 have a dynamic friction coefficient similar to that of the copper-based strands in Sample 1C by having a chemical conversion film. Therefore, the braided wires of Sample 1 and Sample 4 can suppress the above-described fretting corrosion.

Further, the braided wires of Sample 2 and Sample 3 have an alumite film having a sufficient film thickness compared to the chemical conversion film. Therefore, the braided wires of Sample 2 and Sample 3 can suppress the above-described fretting corrosion. However, as can be seen from the evaluation results of the shielding performance of the braided wire of Sample 2, the anodized film is inferior in conductivity. Therefore, as in the braided wire of Sample 3, the braided wire easily coats the outer surface of the alumite film, thereby suppressing fretting corrosion by the alumite film and ensuring the shielding performance by ensuring the conductivity by the conductive layer. It was confirmed that a line was obtained.

In addition, as shown in the results of the braided wires of Sample 1C to Sample 4C, the improved Al is based on the 1000 series Al alloy (Sample 2C), 6000 series Al alloy (Sample 3C), and 6000 series Al alloy. When the alloy (sample 4C) is used, the coefficient of dynamic friction is as large as 0.175 or more compared to the case where copper (sample 1C) is used, and the slipping property between the wires is poor. Therefore, when a braided wire is constructed using 1000 series Al alloy, 6000 series Al alloy, and improved Al alloy as they are, if the braided knitting process is performed at the same linear speed as the copper series braided wire, kinks and disconnections occur. It was easy to do and it was difficult to increase the line speed. On the other hand, as shown in the results of the braided wires of Samples 1 to 4, even when a 1000 series Al alloy (Samples 1 to 3) or an improved Al alloy (Sample 4) is used, a fretting corrosion inhibiting film is formed. As a result, the dynamic friction coefficient becomes 0.170 or less (at the time of chemical conversion film formation) and 0.174 or less (at the time of anodized film formation), improving the slipperiness, and the braiding process at the same linear velocity as the copper-based braided wire Even if it carried out, it became easy to control a kink and a disconnection. According to this result, even for aluminum braided wires, the formation of a fretting corrosion-inhibiting film improves the slippage between the strands by reducing the dynamic friction coefficient on the surface of the strands, and braids the braided wires. It was possible to secure mass production speed equivalent to that of copper-based braided wire in the process, and it was confirmed that it was advantageous for improving mass productivity. In addition, when the anticorrosion material is further apply | coated to the surface of a fretting corrosion suppression film | membrane, it is anticipated that the said effect can be made more reliable.

In addition, as shown in the result of the braided wire of Sample 2C, the 1000 series Al alloy has high conductivity and is advantageous for obtaining good shielding performance, but has a high dynamic friction coefficient and low strength. It can be seen that this is disadvantageous in ensuring wear resistance. On the other hand, as shown in the result of the braided wire of Sample 3C, the 6000-series Al alloy has higher strength than the 1000-series Al alloy and is advantageous in ensuring wear resistance due to vibration, but has low conductivity. It turns out that it is disadvantageous to obtain a good shielding performance. The 3000 series Al alloy and the 5000 series Al alloy have the same tendency as the 6000 series Al alloy. On the other hand, according to the braided wire of the sample 4, by using an Al alloy having a tensile strength of 200 MPa or more and an electric conductivity of 50% IACS or more for the strand main body portion, while securing good shielding performance, It was confirmed that it was easy to improve the wear resistance due to vibration.

As mentioned above, although the Example and experiment example of this invention were demonstrated in detail, this invention is not limited to the said Example and experiment example, A various change is possible within the range which does not impair the meaning of this invention. is there.

Claims

A tubular braided wire having a plurality of strands knitted,
The above-mentioned strand is a strand main body composed of an aluminum wire or an aluminum alloy wire,
A fretting corrosion inhibiting film covering the outer peripheral surface of the wire main body,
Having a braided wire.
The braided wire according to claim 1, wherein the fretting corrosion inhibiting coating is a chemical conversion coating or an alumite coating.
The braided wire according to claim 2, wherein the chemical conversion film is a Cr-containing film, a Zr-containing film, or a Ti-containing film.
The fretting corrosion inhibiting film is an alumite film,
The braided wire according to claim 2, further comprising a conductive layer covering an outer surface of the fretting corrosion inhibiting film.
The braided wire according to claim 2 or 3, wherein a film thickness of the chemical conversion film is 10 nm or more and 150 nm or less.
The braided wire according to claim 2 or 4, wherein the alumite film has a thickness of 10 µm or more and 150 µm or less.
The braided wire according to any one of claims 1 to 6, wherein the aluminum alloy constituting the aluminum alloy wire has a tensile strength of 200 MPa or more and a conductivity of 50% IACS or more.
The braided wire according to any one of claims 1 to 7, which is for vehicles.