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Preparation method of high corrosion-resistant and wear-resistant coating on soluble magnesium alloy surface

A technology of wear-resistant coating and magnesium alloy, which is applied in the direction of metal material coating process, coating, molten spraying, etc., can solve the problems of tool failure, fast corrosion rate, erosion and wear, etc., and achieve the effect of improving construction efficiency

Active Publication Date: 2019-05-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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

Method used

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  • Preparation method of high corrosion-resistant and wear-resistant coating on soluble magnesium alloy surface
  • Preparation method of high corrosion-resistant and wear-resistant coating on soluble magnesium alloy surface
  • Preparation method of high corrosion-resistant and wear-resistant coating on soluble magnesium alloy surface

Examples

Experimental program
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Effect test

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;

[0026] (5) fixing the soluble magnesi...

Embodiment 2

[0029] Embodiment 2 Soluble magnesium alloy surface spraying WC coating

[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

The invention relates to a high corrosion-resistant and wear-resistant coating on a soluble magnesium alloy surface and a preparation method thereof. According to the high corrosion-resistant and wear-resistant coating on the soluble magnesium alloy surface and the preparation method thereof, a soluble magnesium alloy serves as a matrix, the high corrosion-resistant and wear-resistant coating is prepared on the surface of the soluble magnesium alloy, and it is ensured that a material has good corrosion-resistant and wear-resistant performance during service and can be subjected to rapid degradation after service. A preparation technology includes the following steps of (1) pretreatment of a soluble magnesium alloy matrix; and (2) supersonic flame spraying on the magnesium alloy surface. According to the high corrosion-resistant and wear-resistant coating on the soluble magnesium alloy surface and the preparation method thereof, compared with the prior art, the prepared soluble magnesium alloy material with the corrosion-resistant and wear-resistant coating has high corrosion-resistant and wear-resistant properties, and can be rapidly degraded after service requirements are met; thematerial is suitable for sealing and blocking tools used in the process of processing and preparing oil and gas field fracturing; downhole tools prepared by the material have good corrosion-resistantand wear-resistant properties during service, the construction quality and the construction safety are ensured, and degrading are carried out rapidly after service, subsequent processes of flow-back,drilling and milling processes, and the like are omitted, the construction efficiency is improved greatly, the construction cost is saved, and the energy consumption is reduced.

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...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/02C23C4/06C23C4/10C23C4/067C22C23/00
Inventor 李宏祥张济山王健王善林
Owner UNIV OF SCI & TECH BEIJING
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