Aneroid Sphygmo

Gauge shell of standard aneroid sphygmomanometer is normally made of zinc alloy. Sometimes aluminum alloy is adopted.
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Why does the gauge case of the mechanical sphygmomanometer  mostly use zinc alloy?

 

Zinc alloy is an alloy composed of other elements based on zinc. The alloy elements often added are aluminum, copper, magnesium, cadmium, lead and titanium. Zinc alloy has low melting point, good fluidity, easy melting and welding, brazing and plastic processing, corrosion resistance in the atmosphere, waste materials easy to recycle and remelt.It is prepared by melting process and die casting or press processing.

 

According to the manufacturing technology, it can be divided into cast zinc alloy and deformed zinc alloy. Zinc alloys can be divided into deformation and casting zinc alloys according to processing technology. Cast zinc alloys have good fluidity and corrosion resistance, and are suitable for die-casting instruments, automotive parts and shells.

 

The shell of the sphygmomanometer is made of cast zinc alloy. It is corrosion resistant, stable and easy to process.

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