A long-life overhead ground wire and its coating for heavy corrosion environment

A technology for overhead ground wires and corrosive environments, which is applied in coatings, hot-dip plating processes, metal material coating processes, etc., can solve problems such as short service life and poor corrosion resistance, and achieve good wear resistance and excellent corrosion resistance. Effect of thermal shock performance and low expansion coefficient

Active Publication Date: 2018-05-04
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings and problems of the overhead ground wires in the prior art such as short service life and poor corrosion resistance in heavy corrosion environments, the present invention provides a high aluminum and magnesium content suitable for overhead ground wires, long service life, heavy-duty Corrosion in corrosive environments, overhead ground wires that have been industrialized and trial-produced and their preparation processes

Method used

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  • A long-life overhead ground wire and its coating for heavy corrosion environment
  • A long-life overhead ground wire and its coating for heavy corrosion environment
  • A long-life overhead ground wire and its coating for heavy corrosion environment

Examples

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Effect test

Embodiment 1

[0037] A preparation process for long-life overhead ground wires used in heavily corrosive environments, the steps are as follows:

[0038] 1) Immerse the steel wire after degreasing, pickling and alkali cleaning in the plating flux at 65°C for 0.5min, and dry to obtain the plating flux; the components of the flux are as follows (in mass percentage): 45% ZnCl 2 , 8% CaF, 1.2% CeCl 2 , 5.5% CaCl 2 , 0.5%H 2 o 2 , 0.1% surfactant (hexamethyldisilazane and sodium dodecylsulfonate are mixed according to the weight ratio of 2:1), and the remainder is tap water;

[0039] 2) Dip the steel wire into the hot-dip alloy bath at an angle of 30° (that is, the angle between the steel wire and the hot-dip alloy liquid surface is 30°), dip-coat at 420°C for 100s, and dry at 120°C;

[0040] Inert gas protection is carried out during the drying process, and the inert gas is Ar+CO 2 The mixed gas, the volume ratio of the two is 2:8, and the gas output is 2L / min, that is;

[0041] The weig...

Embodiment 2

[0044] A preparation process for long-life overhead ground wires used in heavily corrosive environments, the steps are as follows:

[0045] 1) Immerse the steel wire after degreasing, pickling, and alkali cleaning in 85° C. plating flux for 0.3 min, and dry to obtain the flux plating steel wire; the components of the flux flux are as follows (in mass percent): 60% ZnCl 2 , 2% CaF 2 , 4.2% CeCl 2 , 8.5% CaCl 2 , 0.5%H 2 o 2 , 0.2% surfactant (hexamethyldisilazane and sodium lauryl sulfonate are mixed according to the weight ratio of 2.5:1), and the remainder is tap water;

[0046] 2) Dip the help-plating steel wire into the hot-dip alloying solution at an angle of 42° (that is, the angle between the steel wire and the hot-dip alloying liquid surface is 42°), dip-coat at 435°C for 45s, and dry at 130°C. Inert gas protection is carried out during the drying process, and the inert gas is Ar+CO 2 The mixed gas, the volume ratio of the two is 8:2, and the gas output is 5L / min...

Embodiment 3

[0050] A preparation process for long-life overhead ground wires used in heavily corrosive environments, the steps are as follows:

[0051] 1) Immerse the steel wire after degreasing, pickling and alkali cleaning in the plating flux at 100° C. for 0.2 min, and dry to obtain the fluxing steel wire; the components of the fluxing agent are as follows (in mass percentage): 65% ZnCl 2 , 4.8% CaF 2 , 5% CeCl 2 , 1.3% CaCl 2 , 0.5%H 2 o 2 , 0.3% surfactant (hexamethyldisilazane and sodium lauryl sulfonate are mixed according to the weight ratio of 1.5:1), and the balance is tap water;

[0052] 2) Dip the help-plating steel wire into the hot-dip alloying solution at an angle of 42° (that is, the angle between the steel wire and the hot-dip alloying liquid surface is 42°), dip-coat at 470°C for 100s, and dry at 150°C. Inert gas protection is carried out during the drying process, and the inert gas is Ar+CO 2 The mixed gas, the volume ratio of the two is 7:3, and the gas output i...

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Abstract

The invention discloses an overhead ground wire used in a severe corrosive environment and long in service life and a cladding layer thereof. The cladding layer is prepared from a metal plating solution which is composed of, by weight percentage, 25%-65% of aluminum, 1%-2.5% of magnesium, 0.2%-1.5% of cerium-containing rare earth, 0.1%-0.2% of molybdenum, 0.05%-0.1% of vanadium and the balance zinc. In order to achieve corrosion resistance protection for the overhead ground wire, the anti-corrosion cladding layer which has a high alloy content, meets various property requirements of a zinc, aluminum and magnesium alloy cladding layer, is prepared on the surface of the overhead ground wire and is high in corrosion resistance and long in service life is provided, can be widely applied to the overhead ground wire used in a severe corrosive environment (such as a coastal area, an acid rain area and an industrial pollution area) and meets the requirements that the service life is long, and the maintenance-free time is not less than 15 years.

Description

technical field [0001] The invention belongs to the technical field of steel material surface coating technology, and in particular relates to a long-life overhead ground wire and its coating for heavy corrosion environments. Background technique [0002] Corrosion is the result of the reaction between steel materials and environmental media at the phase interface. It is estimated that about 30% of the annual production of steel is scrapped due to corrosion in the world, and about 10% of the annual production of steel is completely waste. [0003] The galvanized protective layer of the traditional overhead ground wire is affected by the deterioration of the natural environment and the electromagnetic environment of the transmission line, and the corrosion rate is accelerating, which greatly shortens its service life. ), generally 5 to 8 years later, obvious corrosion occurs, and its service life is less than 10 years, so it has to be replaced as a whole, which greatly increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/06C23C2/12C23C2/02C23C2/38C22C18/04C22C21/10H01B7/28
CPCC22C18/04C22C21/10C23C2/02C23C2/06C23C2/12C23C2/38H01B7/28
Inventor 郭凯李辛庚岳增武傅敏王晓明闫风洁曹建梅王学刚李文静李晓宇吴亚平
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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