Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Corrosion prevention technique of aluminum zinc rare earth alloying for oil pipe

A technology of rare earth alloy and oil pipe, which is applied in metal material coating process, pipeline anti-corrosion/rust protection, hot-dip plating process, etc. It can solve the problems of poor anti-corrosion effect and achieve strong adhesion and good corrosion resistance.

Inactive Publication Date: 2005-01-12
DAQING OILFIELD CO LTD
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the poor anti-corrosion effect of existing oil pipes, the present invention provides a zinc-aluminum rare-earth alloy anti-corrosion process for oil pipes. Tubing consumption

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Corrosion prevention technique of aluminum zinc rare earth alloying for oil pipe
  • Corrosion prevention technique of aluminum zinc rare earth alloying for oil pipe
  • Corrosion prevention technique of aluminum zinc rare earth alloying for oil pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: After degreasing, water washing and pickling, the oil pipe use composition is ZnCl 2 160 g / L, NH 4 Cl is 70 grams per liter of crossing liquid for treatment, and then enters a 430°C built-in zinc pot with a liquid rare earth zinc-aluminum alloy with a rare earth content of 0.06% and an aluminum content of 0.03% for coating treatment. After 3 minutes of immersion plating, the Lift the oil pipe out of the zinc liquid at a lifting speed of 3-4cm / s, cool it in the air, passivate it with sodium dichromate and nitric acid, and wash it with water after passivation. The method of adding aluminum in the above-mentioned zinc-aluminum rare earth alloy plating solution: put 0 in the zinc pot # Heat the zinc to 460°C. After the zinc liquid is completely melted, add aluminum into the zinc liquid. After the aluminum is completely melted, keep it warm for 1 hour; the addition of rare earth in the zinc-aluminum rare earth alloy plating solution adopts the method of smelti...

Embodiment 2

[0043] Embodiment 2: After degreasing, washing and pickling, the oil pipe use composition is ZnCl 2 150 g / L, NH 4 Cl is 60 g / L of the aiding solution for treatment, and then enters the zinc-based plating bath of liquid rare earth zinc-aluminum alloy with a rare earth content of 0.05% and an aluminum content of 0.04% built-in at 440°C for plating treatment, plating for 4 minutes Finally, lift the oil pipe out of the zinc liquid at a lifting speed of 3-4cm / s, cool it in the air, passivate it with sodium dichromate and nitric acid, and wash it with water after passivation. The above-mentioned adding method of aluminum in the above-mentioned zinc-aluminum rare earth alloy plating solution: put 0 in the zinc pot # Heat the zinc to 460°C. After the zinc liquid is completely melted, add aluminum into the zinc liquid. After the aluminum is completely melted, keep it warm for 1 hour; the addition of rare earth in the zinc-aluminum rare earth alloy plating solution adopts the method of...

Embodiment 3

[0044] Example 3, the composition of the oil pipe after degreasing, water washing and pickling is ZnCl 2 170 g / L, NH 4 Cl is 50 grams per liter of the aiding solution for treatment, and then enters a zinc-based plating bath with a liquid rare earth zinc-aluminum alloy with a rare earth content of 0.04% and an aluminum content of 0.02% at 435 ° C for plating treatment, plating for 5 minutes Finally, lift the oil pipe out of the zinc liquid at a lifting speed of 3-4cm / s, cool it in the air, passivate it with sodium dichromate and nitric acid, and wash it with water after passivation. The above-mentioned adding method of aluminum in the above-mentioned zinc-aluminum rare earth alloy plating solution: put 0 in the zinc pot # Heat the zinc to 460°C. After the zinc liquid is completely melted, add aluminum into the zinc liquid. After the aluminum is completely melted, keep it warm for 1 hour; the addition of rare earth in the zinc-aluminum rare earth alloy plating solution adopts t...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

This invention relates to ZnAl rare earth alloy antiseptic technology mainly solving the problem of poor antiseptic results of current or / tubs characterizing including the following steps: the inside and outside wall surfaces of the oil tube are de-fat, washed, washed with acid and processed with coating aid to be put into a Zn solution tank containing liquid ZnAl rare earth alloy under 430deg.C-440deg.C to be coated and taken out to be passivated with heavy sodium chromate and HNo3 and washed, said liquid alloy applies alloying method in smelting.

Description

Technical field: [0001] The invention relates to an anticorrosion process for oil pipes in the field of oil field exploitation, and belongs to a zinc-aluminum rare earth alloy anticorrosion process for oil pipes. Background technique: [0002] Daqing Oilfield is a waterflood development oilfield, and the corrosion of oil pipes in water injection wells is very serious. At present, the commonly used anti-corrosion methods for oil pipes used in oil fields are as follows: one is the nickel-phosphorus plating method. The oil pipe coating layer of this anti-corrosion method is very thin. Because the coating layer is thin and does not meet the technical indicators, there must be pinholes, and because the coating layer is cathodic. A large cathode and a small anode reaction appear at the pinhole, which accelerates the corrosion of the oil pipe; the second is the organic coating and epoxy powder thermosetting coating method. This method has a thick coating and a dense thermosetting c...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C22/24F16L58/08
Inventor 吴成龙赵晓光刘大全
Owner DAQING OILFIELD CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com