Aircraft maintenance enterprises require a large quantity of metal parts for the installation of aircraft body panels, onboard equipment, and accessories during aircraft maintenance. The metal raw materials used are generally carbon steel and alloy steel. However, excessive oxygen, nitrogen, and hydrogen content in steel parts and raw materials can have a serious impact on the performance of the parts, such as the hydrogen embrittlement problem that often occurs in steel parts, which affects their service life. Therefore, accurate measurement of the oxygen, nitrogen, and hydrogen content in metal materials such as carbon steel and alloy steel is crucial.

Understand the electronic control composition and gas circuit system operating principles of the instrument, and quickly determine whether the instrument parameters and indicators are normal through daily diagnosis. Perform routine daily maintenance and periodic servicing in accordance with operating procedures to reduce the instrument failure rate.

The carbon sulfur analyzer utilizes a high-frequency induction furnace coupled with an infrared detection system, enabling rapid and accurate determination of the total content of carbon and sulfur elements in various materials such as steel, cast iron, ferroalloys, ores, pure metals, ceramics, rare earth metals, slag, and catalysts. This article introduces some methods of how to avoid common faults through routine maintenance.

Sulfur in cement may exist in two forms: one is sulfate, which is the primary form, introduced by the added gypsum as a retarder to adjust the setting time of cement. The second is sulfide. The addition of active admixtures also brings in some sulfate and a small amount of sulfide.

barium chloride titration, ion chromatography, ion-selective electrode method, inductively coupled plasma optical emission spectrometry (ICP-OES), infrared carbon-sulfur analysis, combustion-iodometric method, barium sulfate gravimetric method, and so on. The gravimetric method involves a long experimental process and large errors in the determination of low-content sulfur.

Vanadium-nitrogen alloy is a new type of alloy material used in the production of microalloyed steels, which can effectively reduce production costs by replacing ferrovanadium. The addition of vanadium nitride to steel can improve its comprehensive mechanical properties such as strength, toughness, ductility and thermal fatigue resistance, while endowing the steel with good weldability. Therefore, the accurate determination of nitrogen content is of great significance for the application of vanadium-nitrogen alloy in production sites.

Since all factors affecting the detection process—including the testing environment, detection method, operator, and other conditions for carbon and sulfur—remain identical during the analysis, this paper only describes the control method for sulfur.

Adding appropriate sulfides to steel can enhance its cutting, processing, and magnetic properties. However, excessive sulfur can deteriorate the mechanical properties of steel. Therefore, sulfur is a key element to be tested in steel, and accurately determining its content is crucial for ensuring the quality of steel.

As a highly specialized analytical technique, oxygen-nitrogen-hydrogen analysis is generally conducted by aircraft maintenance enterprises with the help of professional oxygen-nitrogen-hydrogen analyzers, which can quickly and accurately measure the contents of oxygen, nitrogen and hydrogen in carbon steel and alloy steel metal materials.

the sulfur content in copper concentrate was determined by high frequency infra⁃ red carbon sulfur determinator, and the optimum instrument condition parameters were determined. At the same time , the sample weight and flux addition of copper concentrate samples were studied.