What are the chemical composition test methods for metal materials ? The internal quality inspection of metal materials mainly includes mechanical properties, physical properties, chemical properties, technological properties, chemical composition and internal organization inspection. Nanjing Kirin Scientific Instrument Group Co., Ltd. and everyone to share the next test method, chemical composition is the main factor to determine the performance and quality of metal materials. Therefore, the standard stipulates the chemical components that must be guaranteed for most metal materials, and some even serve as the main indicators of quality and variety. The chemical composition can be analyzed and identified by chemical and physical methods. The most widely used methods are chemical analysis and spectroscopic analysis. In addition, the spark identification method, which is simple in equipment and fast in identification, is also an identification of steel components. A practical and easy way. Â Â Â Chemical analysis : Determine the composition of metals based on chemical reactions. This method is collectively referred to as chemical analysis . Chemical analysis methods are classified into qualitative analysis and quantitative analysis. Qualitative analysis can identify which elements the material contains, but cannot determine their content; quantitative analysis is used to accurately determine the content of various elements. Quantitative analysis is mainly used in actual production. Methods for quantitative analysis are gravimetric analysis and volumetric analysis. Gravimetric method: The appropriate element of separation is used to separate the elements of the metal from the other elements, and then the weight of the elements is measured. Capacity analysis method: Completely react with the test element in the metal with a standard solution (a solution with a known concentration), and then calculate the content of the measured element according to the volume of the standard solution consumed. Spectral analysis method: Each element can produce its own unique spectrum under the excitation of high temperature and high energy. The method of determining the chemical composition and approximate content of metal according to the characteristic spectrum generated after the element is excited is called the spectral analysis method. Normally, the sample is excited by external energy such as arc, spark, and laser, so that the measured element emits a characteristic spectrum. After spectrophotometry, it is compared with the chemical element spectrum table to make an analysis. Â Â Â Â Spark identification method: mainly used for iron and steel, under the grinding wheel grinding due to friction, high temperature effects, various elements, particles generated when the number of sparks oxidation, shape, bifurcation, color, etc., to identify the chemical composition of the material (components) And the approximate content of a method . Nanjing Kirin Scientific Instrument Group Co., Ltd. Testing Center 2017.06.01 Xing Hua Printing Factory , https://www.xinghuaprint.com
