Method for improving resistance of martensite heat-resistant steel to liquid metal corrosion

A liquid metal and heat-resistant steel technology, applied in the field of metal surface treatment, can solve the problems of restricting the sustainable development of nuclear power and poor wettability, and achieve the effect of improving the corrosion resistance of liquid metal and prolonging the service life.

Active Publication Date: 2016-03-09
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

Nuclear power is an ideal choice to meet these challenges, but the problem of nuclear waste disposal has always restricted the sustainable development of nuclear power
Studies have shown that the unique chemical inertness of enamel coatings results in poor wettability with liquid lead-bismuth and chemical bonding with the alloy matrix to form an interface. The price is relatively low and the ability to resist interface peeling is usually better than that of traditional ceramic coatings. It is popular for its excellent high temperature oxidation resistance, but there are few domestic and foreign reports on the corrosion resistance of enamel coatings to liquid lead and bismuth under low oxygen concentration.

Method used

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  • Method for improving resistance of martensite heat-resistant steel to liquid metal corrosion
  • Method for improving resistance of martensite heat-resistant steel to liquid metal corrosion
  • Method for improving resistance of martensite heat-resistant steel to liquid metal corrosion

Examples

Experimental program
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Effect test

Embodiment 1

[0020] (1) Pretreatment of the metal surface: Grind the metal sample of 15mm×10mm×2mm size with metallographic sandpaper to No. 600, and round all the edges and corners, and then sandblast the metal surface. After cleaning with metal detergent, ultrasonic cleaning and drying in deionized water;

[0021] (2) Melt the optimally designed enamel ingredients at a high temperature of 1400°C, and then water-cooled after full reaction, then ball milled to produce enamel powder. The main component of the enamel is SiO 2 : 58.26%, Al 2 O 3 : 19.2%, CaO: 3.66%, ZrO 2 : 5.29%, B 2 O 3 : 4.66%, Na 2 O: 3.40%, KNO 3 : 5.53%;

[0022] (3) Mix the enamel powder with absolute ethanol, spray it on the metal surface, and sinter the enamel coating on the metal surface at 730℃±10℃ through curing reaction after drying to form an enamel coating of about 40μm.

[0023] The above metal material is martensitic heat-resistant steel, the specific chemical composition is: C: 0.25wt.%, Si: 1.43wt.%, Cr: 10.8wt.%,...

Embodiment 2

[0026] The chemical composition of 9-12% Cr martensitic heat-resistant steel is: C: 0.19wt.%, Si: 1.05wt.%, Cr: 10.05wt.%, Mn: 1.06wt.%, W: 1.19wt.% , Ta: 0.1wt.%, V: 0.2wt.%, Nb: 0.01wt.%, the balance is iron. The other surface treatment processes of the metal are the same as in Example 1.

Embodiment 3

[0028] The chemical composition of 9-12%Cr martensitic heat-resistant steel is: C: 0.15wt.%, Si: 1.23wt.%, Cr: 10.46wt.%, Mn: 0.41wt.%, W: 1.5wt.% , Ta: 0.15wt.%, V: 0.19wt.%, Nb: 0.014wt.%, the balance is iron. The surface treatment process of the metal is the same as in Example 1.

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Abstract

The invention aims at providing a method for improving resistance of martensite heat-resistant steel to liquid metal corrosion. The method is characterized in that an enamel powder layer is sprayed to the surface of the martensite heat-resistant steel, and an enamel coating is prepared after a curing reaction is made. The surface of the martensite heat-resistant steel is treated through the method, the liquid metal corrosion resistance of metal can be effectively improved, and the service life of a metal material is prolonged.

Description

Technical field [0001] The invention belongs to the technical field of metal surface treatment, and particularly provides a method for preparing an enamel coating on the surface of a martensitic heat-resistant steel to improve its resistance to liquid metal corrosion. Background technique [0002] With the intensification of the energy crisis, the development of safe, high-energy-density, and environmentally friendly new energy sources is urgent. Nuclear power is an ideal choice to deal with these challenges, but the disposal of nuclear waste has always restricted the sustainable development of nuclear power. The ADS Transmutation System (Accelerator Drivensub-critical System) is currently the most promising nuclear waste transmutation system with its efficient use of nuclear waste and high system safety. Liquid lead and liquid lead-bismuth eutectic alloy have become the material of choice for spallation target and coolant in ADS transmutation system due to their superior physic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23D5/02C23D1/02
Inventor 严伟石全强单以银杨振国王威杨柯
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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