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Hot-dipped galvanized alloy coating with high corrosion resistance for steel member and preparation process thereof

A high corrosion resistance, alloy coating technology, applied in hot dip plating process, metal material coating process, coating and other directions, can solve problems such as high Al content and corrosion, achieve good surface quality, low preparation cost, alloy low content effect

Active Publication Date: 2013-06-26
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Al content in the patented alloy coating formula is too high, which severely corrodes the hot-dip galvanizing production equipment (inner wall of 08F steel zinc pot) commonly used for transmission line steel components, and the zinc pot needs to be replaced frequently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The high-corrosion-resistant hot-dip alloy coating of the steel member of the present embodiment, the alloy ingot adopted during the preparation of the alloy coating consists of the following components by weight percentage:

[0032] Al0.01%, Mg0.01%, Re0.05%, Cu0.002%, and the balance is Zn.

[0033] The rare earth is a mixed rare earth of La and Ce, and the mixing ratio of the two is 1:2

[0034] The preparation process of the alloy coating includes pickling, water washing, plating flux and drying treatment before the hot-dip plating of the plated parts. It is characterized in that it is pickled with hydrochloric acid with a concentration of 10%, pickled for 5 minutes, and washed with water after pickling. When assisting plating, the assisting plating temperature is 50°C hot-dip plating, and the assisting plating time is 40s;

[0035] After the plating aid treatment, the plated parts were dried at 120°C for 20s. After the surface of the sample turned white, the plate...

Embodiment 2

[0038] The high-corrosion-resistant hot-dip alloy coating of the steel member of the present embodiment, the alloy ingot adopted during the preparation of the alloy coating consists of the following components by weight percentage:

[0039] Al0.015%, Mg0.01%, Re0.1%, Cu0.003%, and the balance is Zn.

[0040] The rare earth is a mixed rare earth of La and Ce, and the mixing ratio of the two is 2:1

[0041] The preparation process of the alloy coating includes pickling, water washing, plating flux and drying treatment before the plated parts are hot-dipped, and is characterized in that it is pickled with hydrochloric acid with a concentration of 15%, pickled for 10 minutes, and washed with water after pickling. When assisting plating, the assisting plating temperature is 70°C hot-dip plating, and the assisting plating time is 50s;

[0042]After the plating aid treatment, the plated parts were dried at 120°C for 40s. After the surface of the sample turned white, the plated parts...

Embodiment 3

[0045] The high-corrosion-resistant hot-dip alloy coating of the steel member of the present embodiment, the alloy ingot adopted during the preparation of the alloy coating consists of the following components by weight percentage:

[0046] Al0.02%, Mg0.01%, Re0.2%, Cu0.005%, and the balance is Zn.

[0047] The rare earth is a mixed rare earth of La and Ce, and the mixing ratio of the two is 6:1.

[0048] The preparation process of the alloy coating includes pickling, water washing, plating flux and drying treatment before the hot-dip plating of the plated parts. It is characterized in that it is pickled with hydrochloric acid with a concentration of 20%, pickled for 10 minutes, and washed with water after pickling. During fluxing, the fluxing temperature is 70°C hot-dip plating, and the fluxing time is 60s;

[0049] After the plating aid treatment, the plated parts were dried at 120°C for 40s. After the surface of the sample turned white, the plated parts were immediately pu...

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Abstract

The invention provides a hot-dipped galvanized alloy coating with high corrosion resistance for a steel member. The improvement is that, when the alloy coating is prepared, an adopted alloy ingot comprises the following components in percentage by weight: 0.01-2% of Al, 0.01-2% of Mg, 0.05-3% of Re, 0.002-1% of Cu and the balance of Zn. The alloy coating has the characteristics of high corrosion resistance, low zinc consumption, better economy and the like, which are suitable for the steel members of power transmission lines, and the alloy coating can effectively prolong the corrosion-resistant service life of the steel member of the power transmission line and prolong the corrosion-resistant service life by above 2 times in comparison with industrial hot-dipping of pure zinc while ensuring that the thickness of the coating is not increased.

Description

【Technical field】 [0001] The invention relates to a hot-dip galvanizing process for metal materials, in particular to a high-corrosion-resistant hot-dip galvanized alloy coating for steel components and a preparation process thereof. 【Background technique】 [0002] As a general basic structural part of transmission line towers, steel components, the reliability of their working performance is directly related to the safety and stability of power grid operation. The loss caused by the corrosion damage of steel is huge. According to some data, China’s annual steel corrosion loss is about 500 billion yuan, accounting for 6% of the gross national product. It can be seen that the corrosion of steel has caused extreme losses in materials and energy. Big waste. Hot-dip galvanizing can effectively improve the corrosion resistance of steel, thereby reducing the loss of steel due to corrosion by 20-30%. [0003] At present, the method of coating an alloy coating on the surface of st...

Claims

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Application Information

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IPC IPC(8): C23C2/06
Inventor 孙亮马光韩钰陈新胡俊鹏
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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