On-site metallographic film-coated test paper and preparation method and use method thereof

A technology of test paper and coating, which is applied in the field of on-site metallographic coating test paper, can solve the problems of easy explosion, acute/chronic poisoning, and easy production of poison, and achieve the effects of improving production efficiency, no toxic side effects, and reducing costs

Active Publication Date: 2021-01-26
HUANENG POWER INTERNATIONAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because acetone is irritating, easy to produce poison, easy to produce explosion, if exposed to too much, there will be acute/chronic poisoning symptoms, the purchase and use need to be recorded at the local public security bureau, the procurement

Method used

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  • On-site metallographic film-coated test paper and preparation method and use method thereof
  • On-site metallographic film-coated test paper and preparation method and use method thereof
  • On-site metallographic film-coated test paper and preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Sample selection of a nickel-based alloy

[0028] Formulation of coated test paper:

[0029] Ethylcellulose 40g

[0030] Methyl violet 0.5g

[0031] Absolute ethanol 500mL

[0032] Put absolute ethanol in the container at room temperature, add ethyl cellulose and methyl violet in sequence while stirring, and stir with a magnetic stirrer for 2 to 3 hours, after the ethyl cellulose and methyl violet are completely dissolved Let it stand for more than one day, so that the bubbles in the solution float up and the impurities sink, then pour the upper layer of clean solution into a dry and clean bottle, and skim off the lower layer of impurity solution for use.

[0033] Pour the prepared clean solution on a clean, flat and non-scratched surface. After paving, adjust the surface of the plate, cover the plate, and let it dry. After the ethanol evaporates, remove the test paper on the plate.

[0034] Sample processing procedure: coarse grinding→fine grinding→coarse polishing...

Embodiment 2

[0036] The sample is selected from a nickel-based alloy butt weld

[0037] Formulation of coated test paper:

[0038] Ethyl cellulose 50g

[0039] Methyl violet 0.1g

[0040] Absolute ethanol 500mL

[0041] Put absolute ethanol in the container at room temperature, add ethyl cellulose and methyl violet in sequence while stirring, and stir with a magnetic stirrer for 2 to 3 hours, after the ethyl cellulose and methyl violet are completely dissolved Let it stand for more than one day, so that the bubbles in the solution float up and the impurities sink, then pour the upper layer of clean solution into a dry and clean bottle, and skim off the lower layer of impurity solution for use.

[0042] Pour the prepared clean solution on a clean, flat and non-scratched surface. After paving, adjust the surface of the plate, cover the plate, and let it dry. After the ethanol evaporates, remove the test paper on the plate.

[0043] Sample processing procedure: coarse grinding→fine grindi...

Embodiment 3

[0045] The sample selection material is a nickel-based alloy.

[0046] Formulation of coated test paper:

[0047] Ethyl cellulose 80g

[0048] Methyl violet 0.1g

[0049] Absolute ethanol 500mL

[0050] Put absolute ethanol in the container at room temperature, add ethyl cellulose and methyl violet in sequence while stirring, and stir with a magnetic stirrer for 2 to 3 hours, after the ethyl cellulose and methyl violet are completely dissolved Let it stand for more than one day, so that the bubbles in the solution float up and the impurities sink, then pour the upper layer of clean solution into a dry and clean bottle, and skim off the lower layer of impurity solution for use.

[0051] Pour the prepared clean solution on a clean, flat and non-scratched surface. After paving, adjust the surface of the plate, cover the plate, and let it dry. After the ethanol evaporates, remove the test paper on the plate.

[0052] Sample processing procedure: coarse grinding→fine grinding→c...

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PUM

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Abstract

The invention discloses on-site metallographic coated test paper and a preparation method and a use method thereof, and belongs to the field of metal on-site detection. Acetone is not needed in the manufacturing and using process of the test paper, a solution for preparing the test paper is composed of ethyl cellulose, methyl violet and absolute ethyl alcohol, and only absolute ethyl alcohol is needed in the laminating metallographic process. Compared with the conventional metallographic coated test paper AC paper, the metallographic coated test paper prepared by the invention has the advantages of short preparation time, low cost and higher safety.

Description

technical field [0001] The invention belongs to the technical field of on-site metallographic replication of materials, and in particular relates to an on-site metallographic film-coated test paper and a preparation and use method thereof. Background technique [0002] Metallographic inspection is a widely used material inspection method, which is widely used in the production, processing, and service of materials. Some large-scale workpieces, such as high-temperature steam pipes, valves, and turbine rotors of generator sets, are expensive and do not meet the sampling conditions. In order to monitor the aging state of workpieces, regular metallographic inspections are required, so on-site metallographic inspections that do not damage the workpieces can only be used. At present, on-site metallographic inspection can adopt on-site observation and photographing method or film metallographic method. Due to poor on-site metallographic preparation conditions, it is difficult to e...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N21/01
CPCG01N21/8483G01N21/01
Inventor 周荣灿侯淑芳唐丽英宁娜李季李江王博涵林琳
Owner HUANENG POWER INTERNATIONAL
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