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Why can helium be used as a leak detection gas?
First, because helium's outermost electron shell contains only two electrons, and helium only has one electron shell, this means it has achieved a stable structure. Therefore, helium's chemical properties are relatively stable, making it resistant to reactions and explosions. In some valuable equipment such as airplanes and spaceships, helium is preferred as a leak detection gas. However, helium is scarce in nature and relatively expensive, so to save costs, some companies choose a hydrogen-nitrogen mixture as a leak detection gas, or use nitrogen directly.
Release time:
2025-03-11
Firstly, because helium's outermost electron shell contains 2 electrons, and helium only has one electron shell with 2 electrons, this means it has achieved a stable structure. Therefore, helium's chemical properties are relatively stable. It is not prone to reactions or explosions. In some expensive equipment, such as airplanes and spacecraft, helium is often preferred as a leak detection gas. However, helium is scarce in nature and relatively expensive. Therefore, to save costs, some companies choose to use a mixture of hydrogen and nitrogen as a leak detection gas, or directly use nitrogen.
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