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Corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and preparation method thereof

A corrosion inhibitor, technology for oil and gas fields, applied in earth-moving drilling, wellbore/well components, etc., can solve problems such as worn rotors, and achieve the effects of improved polarization resistance, easy synthesis, and high corrosion inhibition rate

Inactive Publication Date: 2011-04-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the slow-release agent has a certain effect, if you do not add or add less, hard substances will be deposited on the compressor impeller, shaft and diffuser. If you continue to add, a large amount of attachments will be formed. Buildup on the comb seals, wearing down the rotor

Method used

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  • Corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and preparation method thereof
  • Corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and preparation method thereof
  • Corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] Example 1 is the synthesis and preparation of corrosion inhibitors and the evaluation of the corrosion inhibition performance of corrosion inhibitors by the laboratory hanging plate method. The laboratory coupon method is to prepare a corrosion solution in the laboratory to simulate the actual corrosion environment for corrosion coupon experiments. A3 steel (carbon structural steel) test pieces were selected for corrosion experiments, and the blank and corrosion inhibitor were used for comparison. According to the corrosion weight loss and corrosion status of the test pieces, the corrosion inhibition rate was calculated.

example 2

[0031] Example 2 is the evaluation of the corrosion inhibition performance of the corrosion inhibitor by electrochemical method. The three-electrode system of A3 steel sample-platinum electrode-saturated potassium chloride electric shock was used to measure its electrochemical behavior in saturated hydrogen sulfide aqueous solution with and without the addition of corrosion inhibitor.

example 3

[0032] Example 3 is the synthesis and preparation of corrosion inhibitors and the evaluation of corrosion inhibition performance of corrosion inhibitors by on-site hanging method. The on-site coupon method is a corrosion coupon test carried out in a bypass device connected in parallel with a natural gas centrifuge. A3 steel (carbon structural steel) test pieces were selected for corrosion experiments, and the blank and corrosion inhibitors were used for comparison. According to the corrosion weight loss and corrosion status of the test pieces, the corrosion inhibition rate was calculated, and the microscopic shape of the surface of the hanging pieces was observed by scanning electron microscopy. appearance.

[0033] Example 1:

[0034] Proportion: crude quinoline base mixture 1kg

[0035] Potassium Amide 0.2kg

[0036] Monochlorooctane 0.5kg

[0037] Ethanol 4kg

[0038] Add potassium amide to the crude quinoline base mixture [its main components are methyl quinoline (abo...

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Abstract

The invention relates to a corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and a preparation method thereof. The corrosion inhibitor consists of the following raw materials in part by mass: 1 to 1.2 parts of crude quinoline salt-based mixture, 0.2 to 0.4 part of alkali amide compound, 0.4 to 0.6 part of chloralkane compound and 4 to 5 parts of ethanol through a synthetic reaction. Coupon tests in labs and on site and electrochemical tests prove that: the corrosion inhibitor has corrosion inhibiting effect in a sulfur-containing medium. The corrosion inhibitor is low in cost and easy to synthesize, and has high-efficiency practice effect.

Description

Technical field: [0001] The invention relates to a corrosion inhibitor used for anticorrosion of steel equipment in oil and gas fields and a preparation method thereof, belonging to the anticorrosion technology of the petroleum industry. Background technique: [0002] Statistics show that corrosion loss is the first of all kinds of natural disasters. On the one hand, controlling and preventing corrosion can save a lot of resources, and at the same time save energy and manpower for the production of raw materials and equipment, which is of far-reaching significance. [0003] In the petroleum industry, many links such as oil and natural gas exploitation, refining, and transportation have the problem of steel equipment being corroded, and with the extension of oil and gas field exploitation time, more and more corrosive components in oil and gas wells make the equipment corrode. more serious. Severe corrosion causes equipment failure on the one hand, and the replacement of eq...

Claims

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Application Information

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IPC IPC(8): C23F11/10C09K8/54
Inventor 韩烨崔振铎杨贤金朱胜利魏强
Owner TIANJIN UNIV
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