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Method for improving corrosion resistance of pre-twisted shunting strip or continuing strip of overhead conductor

A technology for overhead wires and shunt strips, which is applied to anti-corrosion coatings, pretreatment surfaces, and devices for coating liquids on surfaces, etc. It can solve problems such as the inability to meet the requirements for corrosion protection of overhead wires, achieve excellent oxidation resistance and corrosion resistance, and prevent corrosion. Oxidation corrosion, stable properties

Inactive Publication Date: 2017-06-30
SHANDONG ZHONGSHI YITONG GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For my country's coastal areas, acid rain areas, heavily polluted industrial areas and other heavily corrosive environment areas, the traditional anti-corrosion methods using hot-dip galvanized steel core wires have become increasingly unable to meet the requirements for corrosion protection of overhead conductors

Method used

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  • Method for improving corrosion resistance of pre-twisted shunting strip or continuing strip of overhead conductor
  • Method for improving corrosion resistance of pre-twisted shunting strip or continuing strip of overhead conductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1) Prepare slurry, 100g is 0.8% aluminum powder and 99.2% Y by weight percentage 2 o 3 In 20mL, the modulus is 2.5 and the density is 1.2g / cm 3 The aqueous sodium silicate solution is stirred evenly and prepared into a slurry;

[0047] 2) Manually brush the slurry prepared in step 1) on the pre-twisted splicing strip suitable for the wire LGJ300 / 40;

[0048] 3) Drying, drying the pre-twisted shunt strips manually painted in step 2) in a heat treatment furnace at 20°C for 4 hours, and then drying at 80°C for 3 hours;

[0049] 4) Pre-twisted split strips dried in step 3) were kept at 550° C. for 36 hours in an atmosphere furnace filled with argon and water vapor mixture; then the atmosphere furnace was powered off, and the pre-twisted split strips were placed in the Naturally cool to room temperature in the furnace;

[0050] 5) Remove the powder adhering to the surface of the pre-twisted splicing strip, and it is ready.

[0051] Wherein, in the atmosphere of the mixe...

Embodiment 2

[0053] 1) Prepare the slurry, 100g is 10% aluminum powder and 90% La by weight percentage 2 o 3 Add 30mL of 3 The aqueous sodium silicate solution is stirred evenly and prepared into a slurry;

[0054] 2) Mechanically spray the slurry prepared in step 1) on the pre-twisted shunt strip suitable for the wire LGJ400 / 35;

[0055] 3) drying, drying the pre-twisted shunt strips mechanically sprayed in step 2) in a heat treatment furnace at 30°C for 3 hours, and then drying at 90°C for 2 hours;

[0056] 4) Pre-twisted split strips dried in step 3) were kept at 700° C. for 30 hours in an atmosphere furnace filled with a mixture of helium and water vapor; then the atmosphere furnace was powered off, and the pre-twisted split strips were placed in the Naturally cool to room temperature in the furnace;

[0057] 5) Remove the powder adhering to the surface of the pre-twisted diverter bar, and the product is ready.

[0058] Wherein, in the atmosphere of the mixed gas of inert gas and ...

Embodiment 3

[0060] 1) Prepare slurry, 100g is 20% aluminum powder and 80% Y by weight percentage 2 o 3 Add 50mL of 3 The aqueous sodium silicate solution is stirred evenly and prepared into a slurry;

[0061] 2) Manually brush the slurry prepared in step 1) on the pre-twisted splicing strip suitable for the wire LGJ300 / 40;

[0062] 3) Drying, drying the pre-twisted shunt strips manually painted in step 2) in a heat treatment furnace at 35°C for 2 hours, and then drying at 70°C for 4 hours;

[0063] 4) Pre-twisted shunt strips dried in step 3) were kept at 600° C. for 28 hours in an atmosphere furnace filled with argon and water vapor mixture; Naturally cool to room temperature in the furnace;

[0064] 5) Remove the powder adhering to the surface of the pre-twisted splicing strip, and it is ready.

[0065] Wherein, in the atmosphere of the mixed gas of inert gas and water vapor, the volume ratio of argon and water vapor is 80:20, Y 2 o 3 Purity ≥ 99.00%, particle size ≤ 30 microns; ...

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Abstract

The invention discloses a method for improving corrosion resistance of a pre-twisted shunting strip or continuing strip of an overhead conductor. The method comprises adding aluminum powder and rare earth oxide into a sodium silicate aqueous solution and forming slurry after mixing uniformly, then coating the slurry on the surface of the pre-twisted shunting strip or continuing strip of the overhead conductor, then drying the coated pre-twisted shunting strip or continuing strip of the overhead conductor, placing the dried pre-twisted shunting strip or continuing strip of the overhead conductor in an atmosphere of mixed gases of inert gas and water vapor and preserving temperature for 24-36 hours under 550-750 DEG C, and after cooling, and cleaning powder attached to the surface of the pre-twisted shunting strip or continuing strip of the overhead conductor, wherein a mass ratio of the aluminum powder to the rare earth oxide is 0.8-30:60-99.8. According to the method, the process is simple, and the prepared pre-twisted shunting strip or continuing strip is low in cost, high in practicability, long in service life and high in corrosion resistance.

Description

technical field [0001] The invention relates to a method for improving the corrosion resistance of a pre-twisted shunt bar or a splicing bar of an overhead wire. Background technique [0002] In areas with severe corrosion environments such as high humidity and acid rain, atmospheric environment corrosion is one of the main forms of early failure of overhead conductors. The high concentration of salt, acid gas, dust, etc. in the air can easily cause corrosion to overhead wires and clamps, reduce the overall tensile strength of the wires, and at the same time reduce the effective transmission cross section of the wires to a certain extent. In severe cases, even aluminum wires, steel wires Due to the broken strands and broken wires of the core, it is forced to cut off the power for maintenance and replacement. According to the statistics of the power operation department, the actual service life of wires operating in a heavy corrosion environment for a long time will be reduc...

Claims

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Application Information

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IPC IPC(8): B05D5/00B05D3/04C09D1/02C09D5/10
CPCB05D3/0486B05D5/00C08K2003/0812C08K2003/221C09D1/02C09D5/103
Inventor 朱慧敏唐永传杜宏刚张都清高翔高自彬王刚冯璨张秉良
Owner SHANDONG ZHONGSHI YITONG GRP
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