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Molten zinc corrosion-resistant Fe-B-V alloy

A zinc corrosion and melting resistance technology, applied in the field of corrosion and protection of metal materials, can solve the problems of high brittleness of Mo-W alloys and ceramic materials, application limitations, expensive cobalt-based superalloy materials, etc., to improve the resistance to molten zinc. Corrosive, brittle effect

Active Publication Date: 2019-07-30
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, cobalt-based superalloy materials are expensive, and Mo-W alloys and ceramic materials are brittle, so their applications are limited.
Fe-B alloys in iron-based materials are cheap and have good resistance to molten zinc corrosion, so they have received extensive attention and research. However, the intrinsic brittleness of Fe-B alloys makes the corrosion resistance of Fe-B alloys poor. declined

Method used

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  • Molten zinc corrosion-resistant Fe-B-V alloy
  • Molten zinc corrosion-resistant Fe-B-V alloy
  • Molten zinc corrosion-resistant Fe-B-V alloy

Examples

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no. 1 example

[0033] See Figure 1a , Figure 1a It is the metallographic structure diagram of sample A1 after vacuum melting. This embodiment provides an Fe-B-V alloy resistant to corrosion by molten zinc, which is composed of the following components by mass percentage: V 5.40%, B 4.43%, and Fe balance, which is designated as sample A1.

no. 2 example

[0035] See Figure 1b , Figure 1b It is the metallographic structure diagram of sample A2 after vacuum melting. This embodiment provides an Fe-B-V alloy resistant to corrosion by molten zinc, which is composed of the following components by mass percentage: V 21.34%, B 3.68%, and Fe balance, which is designated as sample A2.

no. 3 example

[0037] See Figure 1c , Figure 1c It is the metallographic structure diagram of sample A3 after vacuum melting. This embodiment provides an Fe-B-V alloy resistant to corrosion by molten zinc, which is composed of the following components by mass percentage: V 31.75%, B 3.20%, and Fe balance, which is designated as sample A3.

[0038] Before conducting the corrosion resistance test of molten zinc, the thickness of the sample before corrosion was measured with a spiral micrometer, and then placed in different graphite crucibles filled with molten zinc, and these graphite crucibles were heated by a pit furnace, and made The temperature of the molten zinc was kept at 520°C, and the samples were taken out after 12 hours, 24 hours, 36 hours and 48 hours of corrosion respectively. The morphology of the corrosion interface between the alloy and molten zinc was analyzed by scanning electron microscopy, and the chemical composition of each Fe-B-V alloy was determined by energy disper...

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Abstract

The embodiment of the invention discloses a molten zinc corrosion-resistant Fe-B-V alloy. According to the embodiment of the invention, a Fe-B-V alloy material is prepared by taking ferroboron, industrial pure iron and vanadium as raw materials; the raw materials comprises the following elements in percentage by mass: 3 to 5 percent of B, 5 to 35 percent of V and the balance of Fe, wherein the average corrosion rate of the Fe-B-V alloy in molten zinc at 520 DEG C is 3.61 to 7.71 microns per hour; and the microhardness is between 726 and 973 HV0.2. A preparation process for the Fe-B-V alloy provided by the embodiment of the invention is simple and convenient; the adopted raw materials are rich in resource; and the Fe-B-V alloy shows excellent corrosion resistance in the molten zinc, and hasa good application prospect in industry.

Description

technical field [0001] The invention relates to the technical field of metal material corrosion and protection, in particular to an Fe-B-V alloy resistant to molten zinc corrosion. Background technique [0002] Hot-dip galvanizing is one of the most cost-effective methods of protecting steel materials from atmospheric corrosion. Hot-dip galvanized products are widely used in plates, pipes, wires, strips and hardware and electrical parts because of their excellent corrosion resistance, decoration and formability. However, molten zinc is highly corrosive to almost all single metals (except W and Mo) and most alloys. Corrosion of molten metal has always been a difficult problem in the galvanizing industry. Especially the equipment parts immersed in the metal melt are strongly corroded and worn by the metal melt, resulting in frequent replacement of equipment and decreased production efficiency. This not only brings huge economic losses, but also causes a waste of resources. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/12C22C33/06
CPCC22C33/06C22C38/002C22C38/12
Inventor 尹付成谢小龙尹冰冰李佳琳易华清尚岩松
Owner XIANGTAN UNIV