A composite electrolyte for preparing the corrosion-resistant surface of petroleum pipelines and a method for preparing the corrosion-resistant layer of petroleum pipelines by ultrasonic-assisted electrodeposition

An oil pipeline, ultrasonic-assisted technology, applied in the field of electrolysis or electrophoresis, can solve the problems of difficult to obtain regular micro-nano structures, difficult process control, short service life, etc., to promote nickel deposition, reduce agglomeration, The effect of improving corrosion resistance

Active Publication Date: 2021-11-12
胜利油田金岛实业有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can theoretically improve the corrosion resistance of stainless steel, the process is not easy to control, and it is difficult to produce regular micro-nano structures, resulting in poor hydrophobicity and short service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The present embodiment makes the stainless steel surface superhydrophobic structure through the following steps:

[0063] (1) Preparation of composite electrolyte: add nickel sulfate, nickel chloride, sodium hydrogen phosphate, sodium sulfate and citric acid to deionized water, stir the solution evenly by magnetic force, mix sodium lauryl sulfate and nano-silicon carbide After mixing, add it to the solution in the magnetic stirring, mix evenly to prepare the electrolyte, the concentration of nickel sulfate in the electrolyte is 150g / L, the concentration of nickel chloride in the electrolyte is 50g / L, sodium hydrogen phosphate in the electrolyte The concentration in the electrolyte is 30g / L, the concentration of sodium lauryl sulfate in the electrolyte is 0.1g / L, the concentration of nano-silicon carbide in the electrolyte is 6g / L, and the concentration of sodium sulfate in the electrolyte is 10g / L, citric acid makes the pH value of the electrolyte solution 4, and the p...

Embodiment 2

[0071] The differences between this embodiment and Embodiment 1 are:

[0072] The concentration of each raw material component in the electrolyte in step (1) is:

[0073] Nickel sulfate 175g / L

[0074] Nickel chloride 65g / L

[0075] Sodium hydrogen phosphate 45g / L

[0076] Sodium Lauryl Sulfate 0.15g / L

[0077] Nano silicon carbide 6g / L

[0078] Sodium sulfate 20g / L

[0079] The consumption of citric acid makes the pH value of composite electrolyte solution be 4,

[0080] In step (3), the concentration of sodium phosphate in the first mixed solution is 50g / L, the concentration of sodium hydroxide in the first mixed solution is 15g / L, and the concentration of sodium carbonate in the first mixed solution is 40g / L L;

[0081] In step (4), the concentration of rhodin in the second mixed solution was 0.75 g / L, and the concentration of hexatropine in the second mixed solution was 0.3 g / L.

[0082] After the modified stainless steel, the static contact angle of deionized wate...

Embodiment 3

[0084] The differences between this embodiment and Embodiment 1 are:

[0085] The concentration of each raw material component in the electrolyte in step (1) is:

[0086] Nickel sulfate 200g / L

[0087] Nickel chloride 80g / L

[0088] Sodium hydrogen phosphate 60g / L

[0089] Sodium Lauryl Sulfate 0.2g / L

[0090] Nano silicon carbide 6g / L

[0091] Sodium sulfate 30g / L

[0092] The consumption of citric acid makes the pH value of composite electrolyte solution be 4,

[0093] In step (3), the concentration of sodium phosphate in the first mixed solution is 70g / L, the concentration of sodium hydroxide in the first mixed solution is 20g / L, and the concentration of sodium carbonate in the first mixed solution is 45g / L L;

[0094] In step (4), the concentration of rhodin in the second mixed solution is 1 g / L, and the concentration of hexatropine in the second mixed solution is 0.5 g / L.

[0095] After the modified stainless steel, the static contact angle of deionized water on t...

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Abstract

The invention discloses a method for preparing a composite electrolyte for preparing the corrosion-resistant surface of petroleum pipelines and an ultrasonic-assisted electrodeposited corrosion-resistant layer of petroleum pipelines, belonging to the technical field of electrolysis or electrophoresis, and the concentration of the solute raw material components in the electrolyte is: Nickel sulfate 150~200g / L, nickel chloride 50~80g / L, sodium hydrogen phosphate 30~60g / L, sodium lauryl sulfate 0.1~0.2g / L, nano silicon carbide 6g / L, sodium sulfate 10~ 30g / L and citric acid 30-50g / L, the solvent is deionized water. During the electrodeposition process, the nickel and phosphorus in the electrolyte undergo a reduction reaction on the stainless steel substrate as the negative electrode and co-deposit on the stainless steel substrate to form a nickel-phosphorus alloy with an amorphous structure and a smooth surface, which improves the resistance of the coating itself. Corrosion, nano-silicon carbide embedded in nickel-phosphorus alloy forms a micro-nano double-roughness structure with nickel-phosphorus alloy on the one hand, forms an air layer with water droplets when it contacts water droplets, forms a hydrophobic structure, and improves corrosion resistance; on the other hand, it improves corrosion resistance. The wear resistance of the coating increases its service life.

Description

technical field [0001] The invention belongs to the technical field of electrolysis or electrophoresis technology, and in particular relates to a method for preparing a composite electrolyte for preparing a corrosion-resistant surface of petroleum pipelines and an ultrasonic-assisted electrodeposition corrosion-resistant layer of petroleum pipelines. Background technique [0002] Metal materials are made into pipe fittings and are widely used in various fields, especially in oil fields, due to their excellent properties such as good electrical conductivity, heat dissipation, and easy processing. However, the chemical properties of metal pipe fittings are relatively active, and they are easily corroded in petroleum, thus shortening the service life of pipe fittings. Therefore, stainless steel pipes with relatively good corrosion resistance are mostly used to reduce the corrosion efficiency of the base material, but they will still be corroded after a long time. [0003] In o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56C25D15/00C25D5/20C25D5/36C25D5/48
CPCC25D3/562C25D5/20C25D5/36C25D5/48C25D15/00
Inventor 郭卫东刘可峰牛宗伟田佩佩滕云龙李丽
Owner 胜利油田金岛实业有限责任公司
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