Dissolution method of nickel-based alloy sample with high Mo content

A nickel-based alloy, high-content technology, applied in the field of dissolution of nickel-based alloy samples with high content of Mo, can solve the problems of high toxicity, glass corrosion, affecting the measurement results, etc., to achieve simple and easy operation, avoid corrosion, dissolve fast effect

Inactive Publication Date: 2012-10-24
YICHANG JIANGXIA MARINE MACHINERY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] For the dissolution method of nickel-based alloy samples with high Mo content, GB8638 provides that HF ​​acid is used as a cosolvent to complete the dissolution. HF acid is highly toxic and has a corrosive effect on glass. The glass container used for measurement The volume parameter is affected to varying degrees by the corrosion of HF, which affects the accuracy of the test results; the measurement of Si cannot be realized with HF dissolution; the GB8638 sample dissolution method sometimes has residues, and there may be incompletely dissolved samples in the residues. sample, affecting the measurement results

Method used

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  • Dissolution method of nickel-based alloy sample with high Mo content

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Experimental program
Comparison scheme
Effect test

Embodiment

[0015] Embodiment: Material: ENiCrMo-3 (welding rod), its element content is as follows:

[0016]

[0017] Step 1. Sample preparation:

[0018] 1. Use ENiCrMo-3 electrode to surfacing on the steel plate to form 40×40×(8-12)

[0019] 2. Surface grinding of surfacing layer

[0020] 3. Prepare 3-5g of sample chips by planing, drilling or milling.

[0021] Step 2. Sample dissolution process:

[0022] (1) Add aqua regia into the container containing the weighed nickel-based alloy sample obtained in step 1, heat to boil and keep it there, and reddish-brown gas is generated in the container;

[0023] (2) When the reddish-brown gas disappears, keep the solution boiling and add HNO to the solution 3 , continue heating to generate red gas;

[0024] (3) When the reddish-brown gas disappears, add HCL to the solution and continue heating, the sample is completely dissolved, if some samples are not completely dissolved, repeat steps (2) and (3).

[0025] Step 3. Determination of el...

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Abstract

A dissolution method of a nickel-based alloy sample with a high Mo content comprises the following steps: adding aqua regia into a container filled with a weighed nickel-based alloy sample with a high Mo content, heating till the solution becomes boiling, keeping the solution boiling to allow reddish brown gas to be generated in the container; when the reddish brown gas disappears, continuing keeping the solution boiling, adding HNO3 into the solution, continuing heating to generate the reddish brown gas; when the reddish brown gas disappears, adding HCL into the solution, keeping heating till the sample dissolves completely. The invention can realize the complete dissolution of the sample without the assistant dissolution of HF acid or other cosolvents, and thus no toxicity of HF acid exists; the invention avoids the problem that HF acid has corrosion effect on glass, and volume parameters of a glass container for measurement are influenced at different degrees due to the corrosion of HF, which thus can influence the accuracy of detection results.

Description

technical field [0001] The invention belongs to the field of metal material detection, and in particular relates to a method for dissolving a nickel-based alloy sample with a high content of Mo. Background technique [0002] For the dissolution method of nickel-based alloy samples with high Mo content, GB8638 provides that HF ​​acid is used as a cosolvent to complete the dissolution. HF acid is highly toxic and has a corrosive effect on glass. The glass container used for measurement The volume parameter is affected to varying degrees by the corrosion of HF, which affects the accuracy of the test results; the measurement of Si cannot be realized with HF dissolution; the GB8638 sample dissolution method sometimes has residues, and there may be incompletely dissolved samples in the residues. , affecting the measurement results. Contents of the invention [0003] The object of the present invention is to provide a nickel base alloy sample dissolution method with a high conte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/44
Inventor 余道斌
Owner YICHANG JIANGXIA MARINE MACHINERY
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