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Surface treatment method for aluminum alloy overhead cable

A technology for surface treatment and overhead cables, applied in the direction of surface reaction electrolytic coating, electrolytic coating, coating, etc., to achieve the effect of simplifying the process

Inactive Publication Date: 2012-01-04
WUXI JIABANG ELECTRIC POWER PIPE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to effectively protect the surface of the cable, the existing technology mostly uses external protection such as conventional insulating layers, and rarely involves the surface treatment of the surface of the alloy cable directly integrated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Co 0.1%

[0018] Si 0.06%

[0019] Sr 0.05%

[0020] Zr 0.005%

[0021] The balance is aluminum and unavoidable impurities.

[0022] Specific treatment process:

[0023] 1) Anodizing;

[0024] 2) Sealing: A. Immerse the aluminum alloy cable treated by the anodic oxidation process into a pH value of 6.0 and a concentration of 50mmol / L Ce(NO3) 3 , the concentration is 60mmol / L CeCl 3 , In the blocking solution of isopropanol 0.1mmol / L, block at 45°C for 3 hours;

[0025] Put the cable treated in step A in a sodium tungstate solution with a pH value of 9.0 and a concentration of 1mol / L, at room temperature, under the condition of 900mV relative to a saturated calomel electrode, and conduct constant potential polarization for 2 hours to complete the sealing treatment .

Embodiment 2

[0027] Co 0.5%

[0028] Si 0.5%

[0029] Sr 0.1%

[0030] Zr 0.31%

[0031] Be 0.05%

[0032] The balance is aluminum and unavoidable impurities.

[0033] Surface treatment method is with embodiment 1.

Embodiment 3

[0035] Co 0.1%

[0036] Si 0.06%

[0037] Sr 0.05%

[0038] Zr 0.02%

[0039] Mg 0.05%

[0040] The balance is aluminum and unavoidable impurities.

[0041] The specific treatment process is:

[0042] 1) Anodizing;

[0043] 2) Sealing: A. Immerse the aluminum alloy cable treated by the anodic oxidation process into a pH value of 5.0 and a concentration of 20mmol / L Ce(NO3) 3 , the concentration is 30mmol / L CeCl 3 1. In the blocking solution of isopropanol 0.05mmol / L, block at 35°C for 0.5 hours;

[0044] Put the cable treated in step A in a sodium tungstate solution with a pH value of 7.0 and a concentration of 0.5 mol / L, at room temperature, under the condition of +100mV relative to a saturated calomel electrode, and constant potential polarization for 1 hour, Complete the closure process.

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Abstract

The invention discloses a surface treatment method for aluminum alloy overhead cables. The method comprises steps that: (1) anode oxidation is carried out; (2) a confining process is carried out, wherein the confining process comprises steps that: A, aluminum alloy overhead cables processed from the anode oxidation technology is immersed into a confining liquid comprising Ce(NO3)3 with a concentration of 20 to 50mmol / L, CeCl3 with a concentration of 30 to 60mmol / L, and isopropyl alcohol with a concentration of 0.05 to 0.1mmol / L, wherein the pH value of the confining liquid is 5.0 to 6.0; and a confining treatment is carried out for 0.5 to 3 hours under a temperature of 35 to 45 DEG C; B, the cables processed through the step A is immersed into a tungstenic acid solution with a pH value of 7.0 to 9.0 and a concentration of 0.5 to 1mol / L; and constant potential polarization is carried out for 1 to 2 hours under room temperature in a condition of +100 to 900mV relative to a saturated calomel electrode, such that the confining process is finished. The method assists in the surface protection of cables.

Description

technical field [0001] The invention relates to a method for surface treatment of cables, in particular to a method for surface treatment of aluminum alloy overhead cables. Background technique [0002] In the field of power transmission, aluminum is light, cheap, and has good conductivity, high specific strength, and good wear resistance, so it occupies a dominant position in the field of electrical engineering. On overhead transmission lines, especially on ultra-high voltage lines and large-span lines, aluminum alloy cables have always been the main material of overhead transmission cables. With the shortage of copper resources, replacing copper with aluminum is the development trend of wire and cable, and the aluminum alloy conductor core with multifunctional characteristics is an inevitable requirement for the development of wire and cable. [0003] In order to effectively protect the cable surface, most of the existing technologies are external protection such as conve...

Claims

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Application Information

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IPC IPC(8): C25D11/18C22C21/00C22C21/02
Inventor 徐德生
Owner WUXI JIABANG ELECTRIC POWER PIPE FACTORY
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