Corrosion inhibitor composition and corrosion inhibitor and application thereof and method for preventing corrosion of metal components

A technology of corrosion inhibitor and composition, which is applied in the direction of drilling composition, chemical instruments and methods, earthwork drilling and mining, etc., can solve the problems of poor corrosion inhibition performance, achieve good corrosion inhibition effect, and is suitable for large-scale The effect of using and reducing the corrosion rate

Active Publication Date: 2018-06-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] Common imidazoline quaternary ammonium salt derivatives are widely used as corrosion inhibitors, but imidazoline quaternary ammonium salt derivatives are suitable for high salt content and CO 2 The oil well production fluid and oilfield reinjection water have poor corrosion inhibition performance

Method used

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  • Corrosion inhibitor composition and corrosion inhibitor and application thereof and method for preventing corrosion of metal components
  • Corrosion inhibitor composition and corrosion inhibitor and application thereof and method for preventing corrosion of metal components
  • Corrosion inhibitor composition and corrosion inhibitor and application thereof and method for preventing corrosion of metal components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] The corrosion inhibitor contains 30% by weight of N,N-diethyl-imidazoline chloride salt, 30% by weight of nonylphenol polyoxyethylene ether (polymerization degree of 15) sodium phosphate and 40% by weight of water, the amount of corrosion inhibitor added It is 80mg / L, coded as H-1.

[0079] The corrosion amount and corrosion inhibition rate are listed in Table 2.

Embodiment 2

[0081] The corrosion inhibitor contains 30% by weight of N,N-diethyl-imidazoline chloride salt, 30% by weight of nonylphenol polyoxyethylene ether (polymerization degree of 15) sodium sulfonate and 40% by weight of water, the addition of corrosion inhibitor The amount is 80mg / L, and the code is H-2.

[0082] The corrosion amount and corrosion inhibition rate are listed in Table 2.

Embodiment 3

[0084] The corrosion inhibitor contains 30% by weight of N,N-diethyl-imidazoline chloride salt, 30% by weight of nonylphenol polyoxyethylene ether (polymerization degree of 15) sodium carboxylate and 40% by weight of water, the addition of corrosion inhibitor The amount is 80mg / L, and the number is H-3.

[0085] The corrosion amount and corrosion inhibition rate are listed in Table 2.

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Abstract

The invention provides a corrosion inhibitor composition. The corrosion inhibitor composition comprises the following components in percentage by weight: 50wt%-90wt% of imidazoline quaternary ammonium salt represented by a formula I, and 10wt%-50wt% of a nonionic-anionic surfactant. The invention further provides a corrosion inhibitor and application thereof. The invention further provides an anti-corrosion method of a metal component which is in contact with a high-salinity water-containing mixture. The anti-corrosion method comprises the step of adding the corrosion inhibitor into the water-containing mixture. The corrosion inhibitor has a good corrosion inhibition effect to high-salinity CO2-containing oil well produced liquid and oilfield reinjection water even when no other aid is added, and the corrosion rate can be obviously reduced; furthermore, sources of components in the corrosion inhibitor are very wide, and the corrosion inhibitor is applicable to large-scale use.

Description

technical field [0001] The invention relates to a corrosion inhibitor composition, the invention also relates to a corrosion inhibitor and its application, and the invention further relates to a method for preventing corrosion of metal components. Background technique [0002] At present, a considerable part of my country's onshore oilfields has entered the middle and late stages of water flooding, and the comprehensive water cut of oil wells is rising continuously, and the salinity of the produced water is high, accompanied by a large amount of erosive substances. Affected by these comprehensive factors, in the process of water injection development and gathering transportation of oil and gas wells, the underground pipe strings of oil and water wells, surface pipelines, storage tanks and various process equipment will be corroded, resulting in huge economic losses. Cause catastrophic accidents and environmental pollution, seriously affecting the production and development o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/54
CPCC09K8/54
Inventor 秦冰罗咏涛
Owner CHINA PETROLEUM & CHEM CORP
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