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Anti-corrosion composite layer, application and preparation method of anti-corrosion composite 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., and achieve good corrosion resistance Penetration, Thickness Reduction, High Compatibility Effect

Active Publication Date: 2020-08-25
SHENHUA ZHUNNENG RESOURCE COMPREHENSIVE DEV COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Anti-corrosion composite layer, application and preparation method of anti-corrosion composite lining layer
  • Anti-corrosion composite layer, application and preparation method of anti-corrosion composite lining layer
  • Anti-corrosion composite layer, application and preparation method of anti-corrosion composite lining layer

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Experimental program
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Effect test

Embodiment 1

[0050] The amorphous alloy used in this embodiment consists of (Ni 58 Ta 34 sn 8 ) 97 Er 3 , selecting elemental metals with a purity of 99.99% for master alloy melting in a high-purity argon environment in which titanium ingots absorb 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 spherical microscopic shape. And ellipsoidal amorphous alloy powder.

[0053] (2) Preparation of amorphous flakes

[0054] Ultrasonic cleaning of the master alloy is put into a quartz tube with a small hole at the bottom, remelted on a vacuum strip machine using an in...

Embodiment 2

[0063] The amorphous alloy used in this embodiment consists of (Ni 55 Ta 35 sn 10 ) 96 Er 4 , smelting according to the method of Example 1 and preparing a master alloy.

[0064] (1) Preparation of amorphous alloy powder

[0065] The master alloy is made into amorphous alloy powder through the nitrogen atomization process, the atomization pressure is 8MPa, the atomization temperature is 1800K, the mass flow ratio is about 0.6, and it is further screened into a particle size of 30-40μm and a spherical microscopic shape. And ellipsoidal amorphous alloy powder.

[0066] (2) Preparation of amorphous flakes

[0067] Ultrasonic cleaning of the master alloy is put into a quartz tube with a small hole at the bottom, remelted on a vacuum strip machine using an induction heating device, and the molten alloy is blown to the surface of a high-speed rotating copper roller with high-pressure argon to obtain a width of 2 to 3mm. For a thin strip sample with a thickness of 30-45 μm, us...

Embodiment 3

[0075] The amorphous alloy used in this embodiment consists of (Ni 57 Ta 34 sn 9 ) 94 Er 6, smelting according to the method of Example 1 and preparing a 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 spherical microscopic shape. And ellipsoidal amorphous alloy powder.

[0078] (2) Preparation of amorphous flakes

[0079] Ultrasonic cleaning of the master alloy is put into a quartz tube with a small hole at the bottom, remelted on a vacuum strip machine using an induction heating device, and the molten alloy is blown to the surface of a high-speed rotating copper roller with high-pressure argon to obtain a width of 2 to 3mm. For a thin strip sample with a thickness of 35-45 μm, ...

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Abstract

The invention provides an anti-corrosion composite layer. The anti-corrosion composite layer sequentially comprises an amorphous alloy layer, an anti-corrosion connecting layer and an acid-resistant ceramic layer. The invention further provides application of the anti-corrosion composite layer serving as an anti-corrosion composite lining layer of a pipeline or a container and a preparation methodof the anti-corrosion composite lining layer for the pipeline or the container. The anti-corrosion composite layer has a novel structural composition, the structure is easy to form, firm and stable in combination, adjustable in thickness and excellent in corrosion resistance, has multiple protection effects aiming at special working conditions in the fields of chemical industry, metallurgy and the like, can be used as the lining layer of equipment such as the pipeline and the container, and is particularly suitable for a process for producing aluminum oxide from fly ash through a "one-step acid dissolution method".

Description

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

Claims

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Application Information

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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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