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Corrosion-resistant grounding alloy and preparation method thereof

A corrosion-resistant and alloying technology, applied in the preparation of corrosion-resistant grounding alloys and in the field of corrosion-resistant grounding alloys, can solve the problems of heavy metal pollution, increase corrosion resistance, etc., and achieve the effects of refining grains, increasing corrosion resistance, and convenient construction

Inactive Publication Date: 2018-09-21
安徽兴广泰新能源技术有限公司
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Problems solved by technology

[0008] The purpose of the present invention is to provide an alloy grounding structure, a grounding alloy and a preparation method. Trace rare earth elements are added to the alloy to refine the crystal grains, improve the electronegative properties of each micro-area on the surface of the material, stabilize the protective film layer, and increase corrosion resistance. , use aluminum alloy instead of pure copper, reduce cost, achieve the same conductivity, and solve the existing problem of heavy metal pollution caused by copper and zinc to the environment

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  • Corrosion-resistant grounding alloy and preparation method thereof

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Embodiment 1

[0032] A corrosion-resistant grounding alloy, the composition of which is Al: 95%, Cu: 4%, RE: 0.1% and unavoidable impurity elements.

[0033] A method for preparing a corrosion-resistant grounding alloy, comprising the steps of:

[0034] Step 1, batching: batching according to the requirements of each component of the grounding alloy;

[0035] The raw materials are 99.5% electrolytic copper and 99.9% pure aluminum plate, and rare earth elements are added in the form of master alloy;

[0036] Step 2. Smelting: Preheat the melting furnace to 200°C for 20-30 minutes, raise the temperature to 400°C and put in the raw material Al, keep the temperature for 30 minutes, and then raise the temperature to 700-800°C at a rate of 20°C / min. When the raw material Al is in a semi-molten state, the temperature is rapidly raised to 1100 °C at a speed of 40-50 °C / min, and the raw material Cu and the rare earth master alloy are put in, and the temperature is raised to 1200-1300 °C and smelted...

Embodiment 2

[0049] The corrosion resistance, resistivity and density of galvanized steel, pure copper and grounding alloy were tested respectively; at the same time, the connection performance of the grounding alloy was tested. The test results are shown in Table 1 and Table 2 below:

[0050] Table 1: Comparison of corrosion resistance, resistivity and density test results:

[0051]

Corrosion rate (mm / a)

Resistivity (10 -8 Ω·m)

Density (10g / cm 3 )

Galvanized steel

0.065

17

7.8

pure copper

0.008

2

8.9

ground alloy

0.01

3.7

2.95

[0052] It can be seen from Table 1 that the corrosion resistance of grounding alloy is better than that of galvanized steel, and the corrosion resistance speed is 6-7 times that of galvanized steel; the conductivity of grounding alloy is 4 times that of galvanized steel; 1 / 3 of zinc, low cost per unit volume.

[0053] Table 2: Test results of grounding alloy connection performance:

[...

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Abstract

The invention discloses a corrosion-resistant grounding alloy and a preparation method thereof and relates to the technical field of grounding metals. The corrosion-resistant grounding alloy disclosedby the invention comprises the following components: 94-96% of Al, 3-5% of Cu, 0.05-0.1% of RE and inevitable impurity elements. The preparation method comprises the following steps: 1, burdening according to requirements of various components of the grounding alloy; 2, smelting to obtain alloy melt; 3, pouring in a vacuum room; 4, performing homogenizing annealing on the casting; 5, performing shot blasting; 6, performing pre-oxidation treatment on the casting surface. By adding trace rare earth elements into the alloy, aims of refining grains, improving electronegativity in each region on the material surface, stabilizing a protective film layer and increasing corrosion resistance are achieved. Pure copper is replaced with an aluminum alloy, the cost is reduced, the same conductivity isachieved, and the problem that heavy metal pollution to the environment is caused by the conventional copper and zinc is solved.

Description

technical field [0001] The invention belongs to the technical field of grounding metals, in particular to a corrosion-resistant grounding alloy and a preparation method of the corrosion-resistant grounding alloy. Background technique [0002] Environmentally friendly alloy grounding materials have outstanding advantages in full-life design, which solves the current grid grounding corrosion problem. Replacing galvanized steel with it can greatly extend the effective life cycle of the grounding grid, improve operational reliability and energy efficiency; replace pure copper or copper-clad steel with it to reduce the material and construction costs of the grounding project; for extending the use of the grounding grid It is of great significance to ensure the life of the power grid, ensure the safety of the power grid, and reduce the construction and maintenance costs of the grounding grid. [0003] As a new energy industry, the photovoltaic industry has developed rapidly in re...

Claims

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Application Information

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IPC IPC(8): C22C21/12C22C1/03C22F1/057C23C8/02C23C8/12
CPCC22C1/026C22C1/03C22C21/12C22F1/057C23C8/02C23C8/12
Inventor 孙后庭宋贤峰
Owner 安徽兴广泰新能源技术有限公司
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