Nitrogen gas is widely used in various industrial processes due to its unique physical properties. It is known for its low moisture content, low oxygen levels, and inert nature, making it an ideal choice for creating controlled atmospheres in industrial applications.
What are the Physical Properties of Nitrogen Gas? 5 Key Facts You Need to Know
1. Low Moisture Content
Nitrogen gas derived from liquid sources typically has a moisture content of less than 1.5 ppm. This corresponds to a dew point of -73°C. This low moisture content is crucial for preventing condensation and maintaining the integrity of the materials being treated in industrial processes.
2. Low Oxygen Levels
The oxygen content in nitrogen gas is usually kept below 3 ppm. This is important for creating an inert atmosphere that prevents oxidation and other chemical reactions that could alter the properties of the materials being treated.
3. Inert Nature
Although not truly inert, nitrogen is often classified as such due to its low reactivity with other chemical compounds. This makes it suitable for use in heat treatment processes where the material must maintain specific characteristics without undergoing chemical changes.
4. Use in Mixtures
Nitrogen is frequently used in mixtures with hydrogen. Common blends include 90% nitrogen and 10% hydrogen. These mixtures are used to create specific atmospheres for processes like hardening, decarburizing, and carburizing, where the balance of gases is critical to the outcome of the treatment.
5. High Purity Applications
In certain industries, such as semiconductor manufacturing, high-quality nitrogen with a purity of ≥99.9995% and a dew point below -65 °C is required. This high level of purity ensures that no impurities interfere with the sensitive processes involved.
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