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Production method of high-corrosive-resisting and nickel-based perfect amorphous alloy coating

An amorphous alloy, high corrosion resistance technology, applied in the coating process of metal materials, coatings, etc., can solve the problems of limited application prospects, reduced corrosion resistance of amorphous alloys, and difficulty in preparing amorphous coatings

Inactive Publication Date: 2008-08-27
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of thermal spraying, crystallization and oxidation always occur, so it is difficult to prepare a completely amorphous coating, thereby reducing the corrosion resistance of the corresponding amorphous alloy, and the application prospect is limited

Method used

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  • Production method of high-corrosive-resisting and nickel-based perfect amorphous alloy coating
  • Production method of high-corrosive-resisting and nickel-based perfect amorphous alloy coating
  • Production method of high-corrosive-resisting and nickel-based perfect amorphous alloy coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, the master alloy is prepared by vacuum induction melting according to the required composition, and the alloy composition is Ni 46.99 Nb 27.2 Ti 7.1 Zr 10.7 co 5.1 Cu 2.91 (wt.%), the master alloy is put into the atomization furnace, and the amorphous alloy powder is prepared by gas atomization technology. Its X-ray diffraction and DSC results are as follows figure 1 . The figure shows that the powder (<63μm) is completely amorphous, and its crystallization temperature is about 826K.

Embodiment 2

[0025] The amorphous alloy coating is prepared by kinetic metal spraying (KM), and the powder particle size for spraying is: figure 2 , 3 . The figure shows that the coating is completely amorphous. The coating structure is relatively dense and the porosity is low.

Embodiment 3

[0027] Measure the coating at 1kmol / m by electrochemical method 3 Corrosion performance in HCl aqueous solution, its polarization curve is as Figure 4 . And compared with the corresponding samples of amorphous strip, electroplated chromium and stainless steel (1Cr18Ni9Ti). It can be seen from the figure that the coating has a low passivation current density and a wide passivation range in this solution, which indicates high corrosion resistance. Its corrosion resistance is slightly worse than that of amorphous strips, and much better than that of electroplated chromium and stainless steel. . Use the weight loss method to measure the coating at 6kmol / m 3 Corrosion rate in HCl aqueous solution, and compared with zirconium-based bulk amorphous, iron-based amorphous alloys, corresponding nickel-based amorphous alloys, 304 stainless steel and chromium, as Figure 5 . The results show that the coating has the lowest corrosion rate almost as the corresponding amorphous alloy. ...

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Abstract

A preparation method for nickel-base noncrystal alloy coat which with corrosion resisting property. It adopts dynamic mellozing technique to make noncrystal alloy from noncrystal alloy powder. The stuff powder consists of the following components by weight percentage: Nb 26-28 %;Ti 5-8 %;Zr 9-11 %;Co 4-6 %;Cu2-4 %;Ni is the rest. Inert gas with the temperature of 500-700 k and pressure of 50-100psi was used to deliver and accelerate the powder. Non-crystal alloy made by this method shows excellent property.

Description

Technical field: [0001] The invention relates to a Ni-based amorphous alloy, and in particular provides a method for preparing a completely amorphous alloy coating, and an idea for making the excellent performance of the amorphous alloy be applied in industry. Background technique: [0002] Since the discovery of amorphous alloys, it has attracted great attention due to its unique structure and properties. This is especially true since the 1990s due to the emergence of bulk amorphous crystals with high glass-forming ability. However, due to the absence of crystal defects, such as grain boundaries and dislocations, amorphous alloys do not undergo work hardening like traditional alloys during deformation, but a single shear band will start, and brittle fracture will occur when the yield limit is not reached. cause catastrophic failure. In this way, the application of amorphous alloys as structural materials is limited. Therefore, the application of amorphous alloys as coatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/00C22C19/03
Inventor 王爱萍王建强常新春侯万良
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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