Water soluble corrosion inhibitor for inhibiting carbon steel CO2 corrosion and its preparation method

A corrosion inhibitor, water-soluble technology, applied in CO2 corrosion corrosion inhibition, water-soluble corrosion inhibitor and its preparation field, can solve failure, imidazoline corrosion inhibitor corrosion inhibition rate decline, imidazoline corrosion inhibitor corrosion inhibition Great impact on performance and other issues, to achieve the effect of strong corrosion inhibition

Inactive Publication Date: 2003-04-16
HUAZHONG UNIV OF SCI & TECH
View PDF4 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] in CO 2 In a corrosive environment, especially at high temperature, the surface of the carbon steel material of the pipeline is often accompanied by a corrosion product ferrous carbonate film, which has a great influence on the corrosion inhibition performance of the injected corrosion inhibitor, while the previous Corrosion inhibitors do not take this into consideration, and both on-site and laboratory corrosion inhibitor performance evaluation tests usually use steel samples with clean surfac

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix 35% rosin amine, 10% acrylic acid, 5% thiosemicarbazide and 50% ethylene glycol by weight and stir evenly to obtain a completely water-soluble CO inhibitor 2 Corrosion inhibitor.

[0017] In order to test the inhibition of CO by this corrosion inhibitor 2 For the corrosion inhibition effect of corrosion, the present invention uses two methods of high temperature static and high temperature dynamic to simulate the field environment to evaluate its corrosion inhibition effect. The total salinity of the medium used in the test is 3.42×10 5 mg / L oilfield reservoir water, the material is J55 steel commonly used in oilfields.

[0018] Table 1 shows the corrosion inhibitor at different concentrations at 90°C, CO 2 The partial pressure is the evaluation result in the medium solution of 2.0MPa, and the test time is 72 hours.

[0019]

[0020] Table 2 shows the corrosion inhibitor in CO at different temperatures 2 The dynamic evaluation results in a medium solu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invented corrosion inhibitor includes following percentages (weight) of constituent; rosin amine 10-40%, element acid 5-30%, thiourea and ramification of thiourea 5-30% and solvent 10-50%. According to molecular design method, the corrosion inhibitor is prepared by adopting macromolecular compounds, small molecule compounds and negative ions with specific adsorption. Thus, the inhibitor restrains the corrosion of pipeline made of carbon steels in wider temperature region and the environment containing CO2, no matter the surface of the pipeline is clean or covered by the film of corrosion product. The invention corrosion inhibitor provides the features of wide suitable area, small use level, high efficiency, easy to produce, avirulence and non-peculiar smell as well as complete water-solubility.

Description

technical field [0001] The invention belongs to the anti-corrosion technology of metal materials, in particular to a method for inhibiting carbon steel CO 2 Corrosion water-soluble corrosion inhibitor and preparation method thereof, it is especially suitable for CO in oil field 2 Corrosion inhibition. Background technique [0002] CO 2 Corrosion is one of the forms of corrosion encountered in oil and gas field exploitation and gathering and transportation pipelines. Dry CO 2 The gas is not corrosive, but CO 2 After being dissolved in aqueous solution, it is more corrosive than hydrochloric acid solution with the same pH. With the development of ultra-deep wells and the increase of water content in the late stage of oil and gas well production and the popularization and application of three-injection oil recovery technology, CO 2 Corrosion is a growing problem. Many oilfields in my country, such as Tarim, Changqing, Sichuan, North China and other oilfields, are already...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C23F11/14
Inventor 李国敏郑家燊郭兴蓬
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap