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Processing fluid for preparing corrosion product film / layer cross section metallographic sample and processing method thereof

A technology of corrosion products and metallographic samples, applied in the preparation of test samples, weather resistance/light resistance/corrosion resistance, coating, etc., can solve problems such as complex operation, low deposition efficiency, human body and environmental hazards, and achieve The operation process is simple, the deposition efficiency is improved, and the effect of a wide range of applications

Inactive Publication Date: 2009-03-04
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the same as the conventional cold mounting method, due to the insufficient strength of the resin material, the cracking of the corrosion product film / layer during the grinding process cannot be avoided.
The use of modified epoxy resin can improve the strength of the inlay material, shorten the curing time and improve the curing effect, but this kind of epoxy resin needs to be imported, and the price is extremely expensive
[0009] (3) The method of pre-depositing Cu, Ni and other metal protective coatings on the surface of the corrosion product film / layer by electroplating is only suitable for corrosion product film / layer samples with good conductivity, and most corrosion product films / layers are semi-electric or insulators, cannot be directly plated
[0010] (4) Vacuum plating can be used to directly deposit a protective layer on the surface of the sample, but the vacuum plating equipment is huge and the operation is complicated, especially the deposition efficiency is very low
[0011] (5) The components of commonly used low-melting point alloys (such as Pb-Sn-Sb, Pb-Sn-Bi, etc.) are toxic and harmful heavy metal elements, which are harmful to the human body and the environment. The wettability of the / layer is sometimes poor, which is easy to cause the sample to loosen
[0012] It can be seen that in order to effectively protect the integrity of the corrosion product film / layer in the process of mounting and mounting the corrosion sample, avoid the rupture of the corrosion product and the separation from the substrate, and at the same time improve the electrical conductivity of the corrosion product film / layer surface. Performance, there is no more ideal and convenient method

Method used

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  • Processing fluid for preparing corrosion product film / layer cross section metallographic sample and processing method thereof
  • Processing fluid for preparing corrosion product film / layer cross section metallographic sample and processing method thereof
  • Processing fluid for preparing corrosion product film / layer cross section metallographic sample and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1 Cross-sectional morphology of two Ti3Al-based alloys after 300 cycles of oxidation at 850°C in air

[0050] 1. Treatment solution: The chemical composition of the pretreatment solution is shown in Table 1, and the chemical composition of the electroless plating solution is shown in Table 2.

[0051] Table 1 Chemical composition of pretreatment liquid

[0052]

[0053] Table 2 Chemical composition of electroless plating solution

[0054]

[0055] Wherein, the corrosion inhibitor is boric acid, and the film-forming accelerator is sodium fluoride.

[0056] 2. Treatment method:

[0057] 1) The main process conditions and operation process of each stage of pretreatment are as follows:

[0058] a) Sensitization treatment: According to the formula shown in Table 1, pour the treatment solution into the beaker, and completely immerse the sample in the treatment solution. The sample should be shaken constantly during the whole process, but the samples should not overlap...

Embodiment 2

[0069] Example 2 Cross-sectional morphology of Ni20Cr alloy after cyclic oxidation at 1050℃ in air for 350 cycles

[0070] 1. Treatment solution: The chemical composition of the pretreatment solution is shown in Table 3, and the chemical composition of the electroless plating solution is shown in Table 4.

[0071] Table 3 Chemical composition of pretreatment liquid

[0072]

[0073] Table 4 Chemical composition of electroless plating solution

[0074]

[0075] Wherein, the corrosion inhibitor is boric acid, and the film forming promoter is sodium fluoride (NaF).

[0076] 2. Treatment method:

[0077] 1) The main process conditions and operation process of each stage of pretreatment are as follows:

[0078] a) Sensitization treatment: According to the formula shown in Table 3, pour the treatment solution into the beaker, and completely immerse the sample in the treatment solution. The sample should be shaken constantly during the whole process, but the samples should not overla...

Embodiment 3

[0088] Example 3 Surface coating 3mg / cm 2 Na 2 SO 4 Cross-sectional morphology of salt film Ti-24Al-14Nb-3V-0.5Mo-0.3Si(at.pct) alloy after corrosion at 850℃ for 10h

[0089] 1. Treatment solution: the chemical composition of the pretreatment solution is shown in Table 5, and the chemical composition of the electroless plating solution is shown in Table 6.

[0090] Table 5 Chemical composition of pretreatment liquid

[0091]

[0092] Table 6 Chemical composition of electroless plating solution

[0093]

[0094] Wherein, the corrosion inhibitor is boric acid, and the film forming promoter is sodium fluoride (NaF).

[0095] 2. Treatment method:

[0096] 1) The main process conditions and operation process of each stage of pretreatment are as follows:

[0097] a) Sensitization treatment: According to the formula shown in Table 5, pour the treatment solution into a beaker, and completely immerse the sample in the treatment solution. The sample should be shaken constantly during th...

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Abstract

The invention provides a treatment solution for preparing corrosion product film / layer section metallographic sample. The treatment solution comprises chemical solution, sensitization solution, activation solution and reduction solution. The invention provides a treatment method for preparing corrosion product film / layer section metallographic sample with treatment solution. The method is chemical plating and also comprises pre-processing. The treatment solution and the treatment method have wide application scope, high deposition efficiency, strong generality and strong operability, which can effectively protect the integrity of the corrosion product film / layer with loose texture. The damage problem of the brittle corrosion product film / layer in the section metallographic sample preparation process can be excellently solved. The observation and analysis requirements for the corrosion product film / layer can be adequately satisfied.

Description

Technical field [0001] The present invention belongs to the technical field of metallographic sample preparation and analysis. Specifically, the present invention relates to a treatment liquid and a treatment method thereof for preparing corrosion product film / layer cross-section metallographic samples, the treatment liquid and the treatment method thereof It can protect the integrity of the corrosion product film of the cross-section metallographic sample. Background technique [0002] Hot corrosion is a type of corrosion that occurs when a metal or alloy is exposed to molten or semi-melted salt deposited on the surface under high temperature conditions. Because the corrosion rate is generally much higher than that of oxidation, and the corrosion product is a process of re-dissolution and precipitation of the oxide film, the corrosion product is relatively loose, and the corrosion product film / layer is easily broken, with all the corrosion products. It is relatively difficult to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N17/00C23C18/00C23C30/00
Inventor 钱余海齐慧滨王炜
Owner BAOSHAN IRON & STEEL CO LTD
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