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The relationship between corrosive media and flowmeters - focus on microfluidic control technology

Does a highly corrosive medium damage mass flow meters? Many companies that use mass flow meters ask this question. Highly corrosive media can damage mass flow meters. The high corrosiveness of the medium is a serious threat to the flowmeter. Only a few types of flowmeters such as anti-corrosive flowmeters are less affected by corrosion. You can take a look at the specific analysis below.
a. Highly corrosive medium Corroses the key components that directly contact the flowmeter with the medium, causing damage and loss of function. For example, a highly corrosive medium causes damage to the diaphragm of the differential pressure transmitter, and the silicone oil leaks completely and fails completely. The electromagnetic flowmeter electrode causes leakage of the medium due to high corrosion, resulting in burning of the outer ring of the excitation line.
b. The key components of the flowmeter are subject to corrosion by highly corrosive media for a long time, which changes the geometrical size, resulting in a decrease in the accuracy of the meter. For example, after the rotor in the rotameter is corroded by the fluid, the outer shape is reduced, resulting in a low value of the flowmeter. In another example, the vortex generator in the vortex flowmeter is corroded by the fluid and the width dimension is reduced, and the surface of the upstream surface becomes rough, thereby causing a change in the flow coefficient. Even the clip-on ultrasonic flowmeter, which is less affected by highly corrosive media, often causes the emission and reception signals to become weak due to the pits of the inner wall of the metal pipe being corroded by the medium, and the sensitivity is lost in severe cases.
c. Shorten the life of the flowmeter. For example, a tapered tube or the like in a metal tube rotameter has been worn out after a few years of use.
d. Highly corrosive medium leakage, if not detected in time, timely treatment, it is easy to cause safety and personal accidents.

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