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A kind of anti-corrosion composite layer and use, and preparation method of anti-corrosion composite inner lining layer

A composite layer and preparation process technology, applied in the direction of coating, process efficiency improvement, metal material coating process, etc., can solve the problems of low physical penetration resistance, metal shell contact, corrosive leakage, etc., to achieve a firm combination and Stable, adjustable thickness, easy to create effects

Active Publication Date: 2022-07-26
SHENHUA ZHUNNENG RESOURCE COMPREHENSIVE DEV COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for this type of working conditions, most of the lining technologies used in China adopt the composite lining technology of "shell-lined rubber-inorganic cement-acid-resistant brick". The disadvantage of this technology is the physical resistance of inorganic silicate adhesives. The permeability is low. Once the slurry solution undergoes multiphase flow high-temperature erosion at the lining interface, it will penetrate into the rubber layer from the inside of the inorganic colloid. The rubber layer generally has a temperature resistance of ≤120°C (using fluororubber). At this time, if the temperature gradient of the slurry solution during the infiltration process does not drop below 120°C, the rubber layer will appear aging and damaged due to high temperature corrosion, which will cause the corrosive slurry solution to contact the metal shell, forming local corrosion. Give way

Method used

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  • A kind of anti-corrosion composite layer and use, and preparation method of anti-corrosion composite inner lining layer
  • A kind of anti-corrosion composite layer and use, and preparation method of anti-corrosion composite inner lining layer
  • A kind of anti-corrosion composite layer and use, and preparation method of anti-corrosion composite inner lining layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The composition of the amorphous alloy used in this example is (Ni 58 Ta 34 Sn 8 ) 97 Er 3 , select 99.99% pure metals to smelt the master alloy in a high-purity argon atmosphere in which the titanium ingot absorbs oxygen in a vacuum non-consumable electric arc furnace, and the obtained master alloy is used to prepare amorphous alloy powder and amorphous flakes.

[0051] (1) Preparation of amorphous alloy powder

[0052] The master alloy is made into amorphous alloy powder by nitrogen atomization process, the atomization pressure is 10MPa, the atomization temperature is 1600K, the mass flow ratio is about 0.6, and it is further sieved into particles with a particle size of 25-30μm and a microscopic appearance of spherical spheres. and ellipsoidal amorphous alloy powder.

[0053] (2) Preparation of amorphous flakes

[0054] After ultrasonic cleaning, the master alloy was put into a quartz tube with a small hole at the bottom, and remelted on a vacuum strip machine ...

Embodiment 2

[0063] The composition of the amorphous alloy used in this example is (Ni 55 Ta 35 Sn 10 ) 96 Er 4 , smelted according to the method of Example 1 and obtained the master alloy.

[0064] (1) Preparation of amorphous alloy powder

[0065] The master alloy is made into amorphous alloy powder by nitrogen atomization process, the atomization pressure is 8MPa, the atomization temperature is 1800K, the mass flow ratio is about 0.6, and the particle size is 30-40μm, and the microscopic appearance is spherical. and ellipsoidal amorphous alloy powder.

[0066] (2) Preparation of amorphous flakes

[0067] After ultrasonic cleaning, the master alloy was put into a quartz tube with a small hole at the bottom, and remelted on a vacuum strip machine using an induction heating device, and high-pressure argon was used to blow the molten alloy onto the surface of a high-speed rotating copper roll to obtain a width of 2-3mm. For thin strip samples with a thickness of 30 to 45 μm, the leng...

Embodiment 3

[0075] The composition of the amorphous alloy used in this example is (Ni 57 Ta 34 Sn 9 ) 94 Er 6, smelted according to the method of Example 1 and obtained the master alloy.

[0076] (1) Preparation of amorphous alloy powder

[0077] The master alloy is made into amorphous alloy powder by nitrogen atomization process, the atomization pressure is 9MPa, the atomization temperature is 1700K, the mass flow ratio is about 0.6, and it is further sieved into particles with a particle size of 30-40μm and a microscopic appearance of spherical spheres. and ellipsoidal amorphous alloy powder.

[0078] (2) Preparation of amorphous flakes

[0079] After ultrasonic cleaning, the master alloy is put into a quartz tube with a small hole at the bottom, and is remelted on a vacuum strip machine using an induction heating device, and the molten alloy is blown onto the surface of a high-speed rotating copper roll with high-pressure argon to obtain a width of 2-3mm. For thin strip samples ...

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Abstract

The invention provides an anti-corrosion composite layer, which sequentially includes an amorphous alloy layer, an anti-corrosion connecting layer and an acid-resistant ceramic layer. Preparation method of anti-corrosion composite inner lining for pipeline or container. The anti-corrosion composite layer provided by the invention has a novel structural composition, the structure is easy to form, firm and stable in combination, adjustable in thickness, and has excellent corrosion resistance, and has multiple protective effects against special working conditions in the fields of chemical industry, metallurgy and the like. It can be used as the inner lining of pipelines, containers and other equipment, especially suitable for the "one-step acid-dissolving method" of fly ash to produce alumina.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion, in particular to an anti-corrosion composite layer, its use and a preparation method of an anti-corrosion composite inner lining layer for pipes or containers. Background technique [0002] Shenhua Zhuneng Resources Comprehensive Development Co., Ltd. took full advantage of the advantages of "high aluminum and gallium rich" in the Zhungeer coalfield, and successfully developed the process of extracting metallurgical grade alumina from circulating fluidized bed fly ash "one-step acid-dissolving method" in China The project is of great significance for alleviating the shortage of bauxite resources and ensuring the safety of aluminum industry resources. [0003] In the more severe process stage of the "one-step acid-dissolving method", the working conditions inside the container and the high-temperature end pipeline are relatively harsh, mainly including: high working temperature (in the rang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/08C23C4/134C23C22/38C22B3/02B05D7/24B05D7/22B05D7/14
CPCC23C4/08C23C4/134C23C22/38C22B3/02B05D7/24B05D7/225B05D7/227B05D7/14Y02P10/20
Inventor 赵宇航高莹张云峰徐靓崔永杰赵飞燕郭志峰李超王丹妮
Owner SHENHUA ZHUNNENG RESOURCE COMPREHENSIVE DEV COMPANY
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