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A kind of preparation method of high corrosion resistance and wear resistance coating on the surface of soluble magnesium alloy
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A wear-resistant coating, magnesium alloy technology, applied in the direction of metal material coating process, coating, melting spray plating, etc., can solve the problems affecting mining production, erosion wear, tool failure and so on
Active Publication Date: 2021-05-14
UNIV OF SCI & TECH BEIJING
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[0004] Downhole tools made of magnesium alloys have high strength and can achieve rapid degradation, but there are still some problems. Due to the low hardness and fast corrosion rate of soluble alloys, erosion is very easy to occur during actual downhole service Wear and tear, causing the tool to fail before completing the use requirements, affecting mining production
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Embodiment 1
[0021] Embodiment 1 Spraying iron-based amorphous coating on the surface of soluble magnesium alloy
[0022] (1) Place the soluble magnesium alloy substrate in ethanol for ultrasonic cleaning;
[0023] (2) 1 hour before spraying, the soluble magnesium alloy substrate after ultrasonic cleaning was subjected to dry sandblasting treatment, the abrasive used in the sandblasting treatment was 20# white corundum sand, and the pressure of the sandblasting treatment was 0.65MPa, so The speed of the sandblasting treatment is 0.5cm / s, and the time of the sandblasting treatment is 5min;
[0024] (3) Use a steel brush to polish the surface of the soluble magnesium alloy substrate after dry sandblasting, remove particulate matter, and obtain a clean soluble magnesium alloy substrate;
[0025] (4) Drying 250-300 mesh iron-based amorphous alloy particles under vacuum conditions at 100° C. for 1 hour to obtain dry iron-based amorphous alloy particles;
[0030] (1) Place the soluble magnesium alloy substrate in ethanol for ultrasonic cleaning;
[0031] (2) 1 hour before spraying, the soluble magnesium alloy substrate after ultrasonic cleaning was subjected to dry sandblasting treatment, the abrasive used in the sandblasting treatment was 20# white corundum sand, and the pressure of the sandblasting treatment was 0.6MPa. The speed of the sandblasting treatment is 0.5cm / s, and the time of the sandblasting treatment is 5min;
[0032] (3) Use a steel brush to polish the surface of the soluble magnesium alloy substrate after dry sandblasting, remove particulate matter, and obtain a clean soluble magnesium alloy substrate;
[0033] (4) Dry WC particles of 250-300 mesh under vacuum conditions at 100°C for 1 hour to obtain dried WC particles;
[0034] (5) fixing the soluble magnesium alloy substrate obtained in step (3); using the dried WC particles obtained i...
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Abstract
A high-corrosion-resistant and wear-resistant coating on the surface of a soluble magnesium alloy and its preparation method. The invention uses a soluble magnesium alloy as a substrate to prepare a high-corrosion-resistant and wear-resistant coating on the surface to ensure that the material has good corrosion resistance during service Wear resistance, and can achieve rapid degradation after service. The preparation process includes the following steps: (1) pretreatment of the soluble magnesium alloy substrate; (2) supersonic flame spraying on the surface of the magnesium alloy. Compared with the prior art, the soluble magnesium alloy material with the corrosion-resistant and wear-resistant coating prepared by the present invention has higher corrosion-resistant and wear-resistant properties, and can realize rapid degradation after fulfilling service requirements. The material of the present invention is suitable for processing and preparing plugging tools used in the fracturing process of oil and gas fields. The downhole tools prepared by using the material can have good corrosion resistance and wear resistance during service, ensure construction quality and safety, and quickly Degradation, eliminating the subsequent flowback, drilling and milling and other processes, greatly improving construction efficiency, saving construction costs, and reducing energy consumption.
Description
technical field [0001] The invention relates to the technical field of magnesium alloy anticorrosion, in particular to a highly corrosion-resistant and wear-resistant coating on the surface of a soluble magnesium alloy and a preparation method thereof. Background technique [0002] China is rich in low-permeability oil and gas resources, which have great potential for exploration and development. However, most of these oil and gas resources are distributed in formations of different depths. The development of these unconventional oil and gas resources must rely on reservoir stimulation technologies such as hydraulic fracturing. In hydraulic fracturing technology, different layers need to be separated by isolation tools (such as fracturing ball seats), and then fracturing is carried out layer by layer. After the construction of all layers is completed, the isolation tools are discharged to open the well. Realize the exploitation of oil and gas. [0003] At present, most comm...
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