What are the metal composition analysis and testing standards?
Date：2024-07-31 09:08:41 Classification
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Metal composition testing usually includes a variety of testing items and methods to ensure that metal materials meet specific quality and performance standards. The following are some key testing items and standards:
1. Mechanical performance testing: including tensile test, high and low temperature tensile test, compression test, shear test, torsion test, bending test, impact test and hardness test, etc.
2. Chemical composition analysis: Analyze the chemical composition content in metals, such as carbon, silicon, manganese, phosphorus, sulfur and various alloying elements.
3. Metallographic testing: evaluate the microstructure of the material, including non-metallic inclusions, low-magnification structure, grain size, fracture inspection, etc.
4. Coating test: measure the thickness and composition of the coating, using coulomb method, metallographic method, eddy current method, radiofluorescence method, etc.
5. Corrosion test: Evaluate the corrosion resistance of materials, including neutral salt spray test, acid salt spray test, hydrogen sulfide corrosion test, etc.
6. Non-destructive testing: Use ultrasonic testing, radiographic testing, magnetic particle testing, penetrant testing and other methods to evaluate internal defects in materials.
When detecting metal components, commonly used methods include:
1. Atomic absorption spectrometry (AAS): suitable for the determination of trace metal elements, with high sensitivity and accuracy.
2. Inductively coupled plasma optical emission spectrometry (ICP-AES): suitable for simultaneous determination of multiple metal elements, with high sensitivity and accuracy.
3. Titration method: a detection method based on chemical reactions, suitable for the determination of constant metal elements.
4. X-ray fluorescence spectrometry: Determine the element type and content of the sample based on the X-ray energy emitted by the sample.
5. Carbon and sulfur analysis: Testing for carbon and sulfur elements in metal materials is accurate, fast and highly sensitive.
In addition, there are other detection methods such as atomic fluorescence (AFS), ultraviolet-visible spectrophotometry (UV), anodic stripping voltammetry, etc., which play an important role in different application fields and detection needs. The choice of these detection methods depends on the type of element to be analyzed, its concentration level, and the specific application requirements.
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