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A wear-resistant and corrosion-resistant treatment method for the surface of aluminum-based valve parts

A treatment method, aluminum-based valve technology, applied in the direction of surface reaction electrolytic coating, anodic oxidation, electrolytic coating, etc., can solve the problems of cost-effective material waste, unable to meet long-term work, etc., to achieve small dimensional tolerance, high surface resistance Grinding performance, weight reduction effect

Active Publication Date: 2018-05-22
XIAN CHANGQING TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the existing problems that the existing valve parts cannot meet the long-time work, high cost performance and serious waste of materials

Method used

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  • A wear-resistant and corrosion-resistant treatment method for the surface of aluminum-based valve parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The invention provides a wear-resistant and corrosion-resistant treatment method for the surface of aluminum-based valve parts, which comprises the following steps:

[0036] Step 1. Clean the surface of the aluminum-based valve parts to be treated in an ultrasonic cleaning tank filled with cleaning solution. After cleaning, wipe the surface of the parts with a non-fiber woven soft cloth;

[0037] Step 2, fixing the cleaned aluminum-based valve parts with the first fixture and then immersing them in the electrolytic cell filled with electrolyte, and connecting the first fixture with the positive pole of the electrolytic cell power supply, and using the aluminum-based valve parts as electrolytic anodes;

[0038] A lead plate is fixed by a second fixture and immersed in an electrolytic cell filled with electrolyte, and the second fixture is connected to the negative pole of the electrolytic cell power supply, and the lead plate is used as the electrolysis cathode;

[0039]...

Embodiment 2

[0051] On the basis of Example 1, the cleaning solution described in step 1 is a mixed solution of absolute ethanol and acetone, and the mixing volume ratio of absolute ethanol and acetone is 3:1. The non-fiber woven soft cloth described in step one refers to non-woven fabric or artificial absorbent cloth. The electrolytic solution described in the second step is a dilute sulfuric acid solution with a concentration of 10-15%. The temperature control equipment for opening the electrolytic cell described in step 3 controls the temperature of the electrolyte in the electrolytic cell below room temperature, which means controlling it at 3-6°C. The electrolyte stirring equipment described in step 3 and step 5 refers to a compressed air stirrer. The blocking solution described in step 6 is a potassium dichromate solution with a mass fraction of 5% and a pH value of 5.5-6.5. It should be noted that pure water can be used for cleaning after sealing treatment in step six.

[0052] T...

Embodiment 3

[0054] Taking the aluminum alloy plate valve and aluminum alloy combination valve commonly used in the aluminum base valve parts of the petroleum industry as examples, the wear and corrosion resistance treatment method for the surface of the aluminum base valve parts provided by the present invention is used to oxidize them. The specific steps as follows:

[0055] Anti-corrosion and wear-resistant treatment is carried out on the surface of the aluminum alloy petroleum plate valve through a self-growing ceramic layer, which specifically includes the following steps:

[0056] (1) Clean the surface of the aluminum alloy oil plate valve to be treated in an ultrasonic cleaning tank, and wipe the surface of the oil plate valve after cleaning with non-woven fabric or artificial absorbent cloth;

[0057] (2) After the oil plate valve processed by step 1 is fixed by a clamp, it is immersed in an electrolytic cell filled with dilute sulfuric acid, and the clamp is connected to the posit...

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Abstract

The invention provides a wear resistance and corrosion resistance treatment method for surfaces of aluminum base valve parts in the petroleum industry. The parts to be treated are placed in a dilute sulfuric acid electrolytic solution to be subjected to electrolyzation, the electrolyzation voltage is controlled to be within the range of 40 V to 90 V, the current density is controlled to be 0.5 A / dm<2> firstly before electrolyzation is started, then the current density is increased step by step for 5 times to 8 times within 20 minutes to 25 minutes till the current density reaches 2.5 A / dm<2>, then the current density in an electrolytic cell is kept at 2.5 A / dm<2>, the electrolyzation time is controlled to range from 1 hour to 3 hours, and finally aluminum oxide ceramic layers with the thickness ranging from 20 micrometers to 100 micrometers are formed on the surfaces of the aluminum base valve parts in the petroleum industry in a self-growth manner. According to the method, wear resistance and corrosion resistance treatment is conducted on the surfaces of the aluminum base valve parts in the petroleum industry based on the principle that the ceramic layers are formed on the surfaces of aluminum base workpieces in the self-growth manner according to the hard anodizing technology, the wear and corrosion problems of the petroleum valve parts are solved effectively, the treatment period is short, the yield is high, the performance stability is high, and the method has broad market prospects.

Description

technical field [0001] The invention belongs to the technical field of wear and corrosion resistance in the petroleum industry, and in particular relates to a wear and corrosion resistance treatment method for the surface of aluminum-based valve parts, in particular to a method for treating the surface of aluminum-based valve parts in the petroleum industry based on hard anodic oxidation method self-growing ceramics. Anti-corrosion treatment method. Background technique [0002] Due to the particularity of the working environment in the oil industry, during the process of oil extraction and oil transportation, the equipment is subjected to erosion and corrosion of corrosion inhibitors, oil, gas and other media for a long time, especially the valve parts in the oil industry, not only have to withstand many The scouring and corrosion of various media, and to withstand relatively high pressure, the pipeline will generate local high pressure due to the uneven distribution of pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/04C25D11/08C25D11/18
CPCC25D11/04C25D11/08C25D11/18
Inventor 成杰张志浩毛丽罗慧娟孙银娟孙芳萍
Owner XIAN CHANGQING TECH ENG