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A wear-resistant graphene modified micro-arc oxidation coating for aluminum alloy drill pipe and its preparation method

A graphene modification and micro-arc oxidation technology, applied in coating, anodizing, surface reaction electrolytic coating, etc., can solve the problems of difficulty in adding graphene, poor wettability and dispersibility, etc., and achieve easy breakdown, Effects of improved wear resistance, increased growth rate and uniformity

Active Publication Date: 2021-05-28
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the poor wettability and dispersion between graphene and metal / inorganic non-metallic matrix materials makes the addition of graphene to the matrix difficult.

Method used

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  • A wear-resistant graphene modified micro-arc oxidation coating for aluminum alloy drill pipe and its preparation method
  • A wear-resistant graphene modified micro-arc oxidation coating for aluminum alloy drill pipe and its preparation method
  • A wear-resistant graphene modified micro-arc oxidation coating for aluminum alloy drill pipe and its preparation method

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preparation example Construction

[0032] The preparation method of the wear-resistant graphene modified micro-arc oxidation coating for aluminum alloy drill rods provided by the invention comprises the following steps:

[0033] Step 1: Soak the sample taken from the aluminum alloy drill pipe in the descaling and oiling liquid for 4-7 minutes, then take out the sample, wash and dry the surface; the descaling and oiling liquid is hydrogen with a mass fraction of 5% potassium oxide solution.

[0034] Step 2: Add sodium silicate, sodium hexametaphosphate, alkali, and complexing agent into water, and mix evenly to obtain a micro-arc oxidation solution; wherein, the concentration of sodium silicate is 0.5-8g / L, and the concentration of sodium hexametaphosphate is 15-35g / L, the alkali concentration is 0.1-1g / L, and the complexing agent concentration is 0.1-1.5g / L; among them, the alkali is one or both of potassium hydroxide and sodium hydroxide; the complexing agent is Sodium citrate.

[0035] The specific surface ...

Embodiment 1

[0042] The preparation process steps of the wear-resistant graphene-modified micro-arc oxidation coating for the alloy drill pipe are as follows:

[0043] Step 1: Put the sample taken from the aluminum alloy drill pipe into the descaling oil solution for 7 minutes, then take out the sample, wash and dry the surface. Wherein, the derusting and deoiling solution is potassium hydroxide solution with a mass fraction of 5%.

[0044] Step 2: The micro-arc oxidation solution is prepared through the following process: adding sodium silicate, sodium hexametaphosphate, alkali, and complexing agent into water, and mixing evenly to obtain the micro-arc oxidation solution; wherein, the component content of the micro-arc oxidation solution is For: the concentration of sodium silicate is 4g / L, the concentration of sodium hexametaphosphate is 28g / L, the concentration of alkali is 0.2g / L, and the concentration of complexing agent is 0.5g / L. Wherein, the alkali is potassium hydroxide; the comp...

Embodiment 2

[0051] The preparation process steps of the wear-resistant graphene-modified micro-arc oxidation coating for the alloy drill pipe are as follows:

[0052] Step 1: Soak the sample taken from the aluminum alloy drill pipe in the rust and oil solution for 4 minutes, then take out the sample, wash and dry the surface. Wherein, the derusting and deoiling solution is potassium hydroxide solution with a mass fraction of 5%.

[0053] Step 2: The micro-arc oxidation solution is prepared through the following process: adding sodium silicate, sodium hexametaphosphate, alkali, and complexing agent into water, and mixing evenly to obtain the micro-arc oxidation solution; wherein, the component content of the micro-arc oxidation solution is For: the micro-arc oxidation liquid component content is: the concentration of sodium silicate is 6g / L, the concentration of sodium hexametaphosphate is 35g / L, the concentration of alkali is 0.3g / L, and the concentration of complexing agent is 0.3g / L. W...

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Abstract

A wear-resistant graphene-modified micro-arc oxidation coating for aluminum alloy drill pipe and its preparation method. After immersing the sample taken from the aluminum alloy drill pipe in a derusting and oil-removing liquid, the sample is taken out, washed and blown. Dry the surface; pour the graphene dispersion into the micro-arc oxidation solution, and then use a pneumatic stirrer to stir for 5 to 8 minutes to obtain the graphene micro-arc oxidation solution; put the degreased aluminum alloy drill pipe sample at a temperature of 20 The micro-arc oxidation is carried out in the graphene micro-arc oxidation solution at ~40°C, and then taken out; the sample after the micro-arc oxidation is cleaned, and then dried to obtain a wear-resistant graphene-modified micro-arc oxidation coating for aluminum alloy drill pipe. A wear-resistant graphene-modified micro-arc oxidation coating for an aluminum alloy drill pipe of the present invention, after adding graphene, the growth rate and uniformity of the coating are improved, the friction coefficient of the coating is reduced, and the coating is wear-resistant Performance improved by more than 50%.

Description

technical field [0001] The invention belongs to the technical field of drilling engineering, and in particular relates to a wear-resistant graphene-modified micro-arc oxidation coating for an aluminum alloy drill pipe and a preparation method thereof. Background technique [0002] With the exploration and development of deep oil and gas resources, the number of exploration and development wells in complex working conditions such as ultra-deep wells, horizontal wells, high-temperature, high-pressure and high-corrosion medium wells has increased rapidly, and thus higher requirements have been put forward for exploration and development equipment, especially drill pipes. requirements. In the process of drilling deep wells and ultra-deep wells, aluminum alloy drill pipes are widely used due to their low density, light weight, high specific strength, strong impact resistance, and insensitivity to hydrogen sulfide stress corrosion. However, the aluminum alloy drill pipe has disad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/06C25D15/00
CPCC25D11/026C25D11/06C25D15/00
Inventor 朱丽娟冯春路彩虹韩礼红蒋龙王航
Owner BC P INC CHINA NAT PETROLEUM CORP
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