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Plating and osmosizing combined process for preparing multiple elements osmosized anticorrosion Ni-base-alloy

A technology of multi-infiltration and corrosion-resistant alloys, which is applied in the field of plating infiltration and composite multi-infiltration high-alloy nickel-based corrosion-resistant alloys, which can solve the problems of damaging the corrosion resistance of the infiltration layer.

Inactive Publication Date: 2003-02-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many precipitated phases in the alloy infiltrated layer formed on the surface of low carbon steel, which will damage the corrosion resistance of the infiltrated layer

Method used

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  • Plating and osmosizing combined process for preparing multiple elements osmosized anticorrosion Ni-base-alloy
  • Plating and osmosizing combined process for preparing multiple elements osmosized anticorrosion Ni-base-alloy

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Experimental program
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Effect test

Embodiment 1

[0029] Double-layer glow multi-component co-infiltration of high-quality nickel-based corrosion-resistant alloy is carried out on the surface of low-carbon steel. The source electrode: 1050V, the workpiece voltage is 250V, the air pressure is 35Pa, the pole spacing is 15mm, and the metal infiltration time is 3 hours. There is a certain amount of Mo-rich needle-like μ phase and massive M in the infiltrated layer structure 6 C is precipitated, and the phase composition of the composite plating and infiltration layer prepared by using brush plating Ni coating as pretreatment and double-layer glow multi-component co-infiltration is a single γ phase. Harmful precipitated phases in the infiltration layer such as needle-like μ phase and massive M 6 c. see picture 1.

Embodiment 2

[0031] The electrochemical performance of the composite plating layer prepared by brush plating Ni coating in 3.5% NaCl and 5% HCl solution shows that: composite plating on 20 steel substrate The infiltration layer can significantly improve the corrosion resistance of a single multi-component infiltration layer in 3.5% NaCl and 5% HCl solutions. Tables 1 and 2 are the electrochemical test results of the composite plating infiltration layer and the comparison material in 3.5% NaCl and 5% HCl solutions respectively. It can be seen that the pitting potential of the composite plating layer in 3.5% NaCl solution is 710mV higher than that of the Shuanghui multi-component layer, and the pitting potential of the composite plating layer in 5% HCl solution is 900mV higher than that of the Shuanghui multi-layer layer . Table 3 is the composite plating infiltration layer and contrast material in 20% HCl and 20% H 2 SO 4 The results of the soaking experiment in the solution.

[0032] ...

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Abstract

A process for plating and co-impregnating multiple elements to obtain anticorrosion Ni-base alloy includes electric brush-plating technology and dual-glow multi-element co-impregnating Ni-base alloy technology. It includes such steps as electrically connecting negative electrode of power supply, removing oil under 8-12 V and at 4-6 m / min of relative motion speed, activating by activating liquid No.1 under 10-14 V and at 6-8 m / min of relative motion speed, water washing, activating by activating liquid No.3 under 12-16 v and 6-8 m / min of relative motion speed, and plating working layer under 10-14 v and at 9-13 m / min of relative motion speed.

Description

technical field [0001] The invention provides a method for improving the structure and performance of a double-layer glow ion multi-component co-infiltration layer, which is applicable to the technical field of preparation of advanced surface composite corrosion-resistant gradient materials, and relates to the preparation process of a double-layer glow ion multi-component alloy co-infiltration . Background technique [0002] The double-layer glow ion metal penetration technology is patented in many countries in my country (U.S. Patent No. 4,520,268; U.S. Patent No. 4,731,539; U.K. Patent No. 2,150,602; Canada Patent No. ) is a new technology of plasma surface metallurgy, which is developed on the basis of ion nitriding technology. Its basic principle is to use the plasma generated by gas glow discharge under low vacuum conditions to make the surface of ordinary materials form Surface alloy layers with special physical and chemical properties, such as high-speed steel, stainle...

Claims

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Application Information

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IPC IPC(8): C23C14/38C23C28/02C25C1/06C25C3/12
CPCY02P10/20
Inventor 谢锡善徐江董建新童世运徐重
Owner UNIV OF SCI & TECH BEIJING