Selection of measuring electrodes for electromagnetic flowmeters at different pH values
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Which expert knows which type of electrode is suitable for an electromagnetic flowmeter when treating wastewater with resin at a pH of 2?
Polytetrafluoroethylene can be used for the lining, while 316L, titanium, and tantalum can all be used for the electrodes
The electrodes made of 316L might not work! Titanium and tantalum; I’m not sure if titanium is suitable. I found online that media with a pH value of 1 are corrosive to titanium, but I couldn’t find any information on how media with a pH value of 2 affect titanium And we also need to consider using titanium electrodes instead of tantalum electrodes, as the price of tantalum is higher than that of titanium! Could the senior explain it in more detail?
A pH value of 2 indicates that the liquid is highly acidic. Titanium electrodes (affordable), titanium electrodes (with properties similar to glass), platinum electrodes (not resistant to alkali corrosion)
So it’s not clear whether a titanium electrode is suitable when the pH value is 2
Titanium electrodes are not resistant to reducing acids, such as sulfuric acid and hydrochloric acid. So using titanium electrodes is cost-effective, while using tantalum electrodes is too expensive.
Thank you, sir:handshake
Check the temperature; if it’s too high, titanium may not be suitable. Basically, choosing tantalum ensures reliability, but there’s no need to use tantalum electrodes for everything. .