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

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...

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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

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