Method for detecting components of NiCr alloy

Abstract

The invention provides a method for detecting components of a NiCr alloy, which comprises the following steps: mixing the NiCr alloy with hydrochloric acid for the first time, heating, mixing with sulfuric acid for the second time to obtain a mixed solution, and detecting in an inductively coupled plasma emission spectrometer, wherein the volume ratio of the hydrochloric acid to the sulfuric acid is (1.8-2.2):1, the concentration of the hydrochloric acid is 38-42 wt%, and the concentration of the sulfuric acid is 95-98wt%; and dissolving the NiCr alloy in the mixed acid of the hydrochloric acid and the sulfuric acid until the mixed solution is in a clear and transparent state, so that the detection standard of ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer) on a machine is reached, and the method is simple to operate and can be used for simultaneously detecting two main elements, namely Ni and Cr.

Description

technical field [0001] The invention relates to the technical field of NiCr alloys, in particular to a method for detecting the composition of NiCr alloys. Background technique [0002] The coating target is a sputtering source that forms various functional films on the substrate by sputtering under appropriate process conditions through magnetron sputtering, multi-arc ion plating or other types of coating systems. The content of Ni and Cr will affect the sputtering effect. rate. [0003] The commonly used testing equipment for NiCr alloy is Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES). ICP-OES has less interference, stable signal, and simple operation. It only needs to be dissolved with acid before testing. ICP-OES is mainly used to detect most metal elements and some non-metal elements. [0004] CN111289499A discloses a method for simultaneously detecting multiple trace elements in iron-containing waste acid, including the following steps: sample pr...

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Problems solved by technology

[0004] CN111289499A discloses a method for simultaneously detecting multiple trace elements in iron-containing waste acid, including the following steps: sample pretreatment: weigh 2-15 g of iron-containing waste acid sample, add 20-50 mL of hydrochloric acid, 2-5 g of oxidant, Stir until the iron-containing waste acid is completely oxidized into ferric chloride, transfer the sample to be tested to a separatory funnel, add 10-30mL extractant, and extract 3-5 times to remove Fe 3+ Extract cleanly, take the water layer, enrich in a water bath, transfer the sample solution to a 50mL volumetric flask, shake it at a constant volume, and make a blank at the same time; select the element spectrum line; draw a standard curve; detect the sample, this method does not involve the NiCr alloy composition detection

[0005] CN108613970A discloses a method for measuring the rhenium element in rare earth nodular cast iron. The method includes dissolving samples in hydrochloric acid nitric acid hydrofluoric acid, complexing saturated boric acid, and residue burning method to measure the content of rhenium in rare earth nodular cast iron. Coupling plasma emission spectrometer to detect rhenium content in rare earth ductile iron, this method does not involve the detection of NiCr alloy composition

[0006] CN104316512A discloses a method for measuring the content of barium in the inoculant, the method comprising the steps of: preparing a standard curve solution of barium, configuring the standard curve solution, measuring the standard curve solution on an inductively coupled plasma emission spectrometer, and using standard The concentration of the barium in the curve solution is the abscissa, and the emission spectrum intensity of the barium in the standard curve solution measured is the ordinate to draw the working curve, and the same measurement conditions of the previous steps are used to measure the liquid to be tested. The concentration of barium in the test solution, and then calculate the content of barium in the sample to be tested, this method does not involve the detection of NiCr alloy composition

[0007] At present, there is no clear dissolution method for NiCr alloy, so it is necessary to develop a method to dissolve NiCr alloy, and then obtain samples that can be tested by ICP-OES

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