Method for measuring content of silicon in non-oriented silicon steel environment-friendly coating liquid

Abstract

The invention discloses a method for measuring the content of silicon in a non-oriented silicon steel environment-friendly coating liquid. The method comprises the following steps: (1) digestion: adding nitric acid into a coating liquid sample and carrying out digestion treatment; (2) filtering: filtering a digestion solution after digestion; (3) carbonization and melt: carbonizing a precipitate on an electric furnace at a low temperature, adding a sodium carbonate-boric acid mixed flux, and melting at a high temperature; (4) dissolution and acidification: heating and dissolving a molten product with pure water at low temperature, and adding hydrochloric acid for acidification to obtain a to-be-detected solution; (5) standard solution preparation: preparing a silicon element standard solution and preparing a series of standard solutions; and (6) ICP instrument detection: measuring the silicon element intensity in the standard solution and the to-be-detected solution, and calculating the silicon element content in the to-be-detected solution. The method provided by the invention fills up the technical blank of domestic methods for determining the silicon content in the silicon steelenvironment-friendly coating liquid, is simple to operate and high in result accuracy, effectively monitors the silicon content in the environment-friendly coating liquid, and has guiding significance for monitoring and detecting the coating quality in silicon steel manufacturing.

Description

technical field [0001] The present application relates to the technical field of chemical analysis, in particular to a method for determining the silicon content in an environmentally friendly coating solution for non-oriented silicon steel. Background technique [0002] The surface of non-oriented silicon steel sheet is often coated with an insulating coating to reduce the eddy loss generated during the operation of electrical appliances and motors. The coated silicon steel sheet has high interlayer resistance and good corrosion resistance. , This layer of insulating coating is called non-oriented silicon steel coating. At present, non-oriented silicon steel surface coatings are mainly divided into three types: organic coatings, inorganic coatings, and semi-inorganic coatings, but these three types of coatings all have certain defects, such as the heat resistance and weldability of organic coatings. Poor, the punching property of the inorganic coating is not good, although...

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Problems solved by technology

At present, there is no national standard for the detection of silicon content in the coating liquid. Most of the existing detection methods are aimed at the detection of silicon in metals, lime, and slag. Spectrophotometry, gravimetric method, inductively coupled plasma emission spectrometry, and X-ray fluorescence spectrometry is used for analysis, but spectrophotometry and gravimetric methods generally have shortcomings such as complicated sample pretreatment operations and long analysis cycles, which bring inconvenience to actual production. X-ray fluorescence spectrometers still have certain defects in liquid analysis, and The coating liquid contains a large amount of organic components, and the atomization effect is poor when directly analyzed by the inductively coupled plasma emission spectrometer, which affects the accuracy of the detection data

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