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Method for resisting fused zinc corrosion of steel and iron product

An anti-corrosion and anti-melting technology of zinc liquid, applied in metal material coating process, hot dip plating process, coating and other directions, can solve the problems of anti-corrosion and easy damage of liquid zinc, prolong the service life and reduce the consumption of zinc , the effect of easy replacement

Inactive Publication Date: 2006-07-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If ceramic heating devices are used, there is a problem of easy damage, and if steel materials are used, the problem of corrosion resistance to liquid zinc is still involved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]A zinc pot with a size of 13m×1m×1.2m, welded with a 50mm thick steel plate. After removing burrs everywhere with an angle grinder, sew the flexible cloth with the following composition into a rectangular bag with an upper opening of 13m×1m×1.4m, cover the inner wall of the zinc pot, and place the upper opening along the zinc The pot tank wall is turned out and fixed to prevent the zinc liquid from corroding the zinc pot during hot-dip galvanizing. Add the zinc ingot to be melted or the molten zinc solution gradually, heat and melt the zinc ingot or keep the temperature of the molten zinc solution at 450-480°C, and then galvanize the parts.

[0039] SiO 2 : 54.0~88.0%;

[0040] Al 2 o 3 : 6.0~25.0%;

[0041] B 2 o 3 : 0~9.0%;

[0042] CaO: 0~25.0%;

[0043] MgO: 0.2~14.0%;

[0044] TiO 2 : 0~0.5%;

[0045] K 2 O: 0~0.3%;

[0046] Na 2 O: 0~13.0%;

[0047] Fe 2 o 3 : 0.1 to 1.5%.

Embodiment 2

[0049] Steel tube heater, the size is φ100mm×900mm. Sew the flexible cloth with the following composition into an upper opening bag with a size of φ100mm×900mm, and wrap it tightly on the outer surface of the heating tube to prevent the zinc liquid from corroding the steel heating tube during heating.

[0050] SiO 2 : 85.0~99.0%;

[0051] Al 2 o 3 : 1.0~6.0%;

[0052] CaO: 0~10.0%;

[0053] Fe 2 o 3 : 0-0.5%.

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Abstract

The method to resist Zinc solution corrosion comprises: cover a piece of soft fabric that resists to Zinc solution corrosion and 480-960Deg and composes a plurality of oxides on the steel product surface to insulate the product from Zinc solution. This invention overcomes defects in prior art, reduces difficulty and cost, and benefit to Zn cooker and inner-dip heater.

Description

technical field [0001] The invention relates to a method for resisting molten zinc corrosion of steel products. Background technique [0002] Steel hot-dip galvanizing technology is the most economical and effective method to prevent steel from corroding in the natural environment, and is widely used in the anti-corrosion of iron towers, highway guardrails, steel structures, etc. The method is to put the iron and steel parts to be treated into a zinc pot at 460-480 ° C, take them out after staying for a certain period of time, and coat the surface of the workpiece with zinc. [0003] Liquid zinc is obtained by heating and melting in a large container called a zinc pot. A common zinc pot is welded with high-quality low-carbon steel plates with a thickness of 35 to 60 mm. At the bottom or side of the zinc pot, coal, or resistance wire heating. It is easy to make, wide in adaptability, easy to repair and replace, and widely used. However, due to the poor corrosion resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F15/00C23C2/00
Inventor 凌国平
Owner ZHEJIANG UNIV
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