For an electromagnetic flowmeter used to measure process water at pH 4.5, can electrodes made of 316 material be used? Is it really necessary to use tantalum electrodes?
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I’m in a hurry; please, guys, help me out
Electrodes made of 316 are fine; for BU, tantalum electrodes should be used
pH 4.5 is, for a medium, merely an indicator of acidity or alkalinity; it does not reflect other components present in the medium. Choosing the electrodes for an electromagnetic flowmeter requires determining based on the specific composition of the medium, not just the pH value. For nearly saturated saline solutions, a pH of 4.5 is also possible, but stainless steel electrodes are not suitable; titanium electrodes are preferred. For some media containing components that have a strong complexing effect on iron ions, stainless steel electrodes are not suitable; instead, platinum-iridium alloy electrodes are more appropriate.