Electromagnetic flowmeter material selection guide- micro corrosion of the series
Electromagnetic flowmeter liquid part of the electrode and the choice of lining material depends on the factors influencing the measured medium, in this paper, through measuring on ordinary water material under the condition of how to choose suggestion. But in the process of industrial production, under different working conditions, the electromagnetic flow meter used for industrial drainage, water treatment industry, petrochemical industrial wastewater, such as the electrodes and the lining material is different, because these with the corrosive medium.
This paper focuses on the measured medium again with micro corrosion situation, we in the choice of the electrode and the lining part of the electromagnetic flowmeter material how to choose.
Part of electrode material choice: molybdenum stainless steel (0 cr18ni12mo2ti) used in industrial waste water, sewage treatment, such as with micro corrosion medium, at the same time apply to nitrate, boiling hydrochloric acid, weak corrosive acids such as formic acid, alkali solution. B and hartz hartz alloy C is a stainless steel grade, has good resistance to chemical corrosion resistance, suitable for weak acid, weak alkali, resistant to sulfuric acid, phosphoric acid, hydrofluoric acid, organic acids, such as oxidation or non oxidizing acid and alkali. Due to industrial wastewater, the mets have some chemical reaction solution, has certain weak corrosion, electrode part of long-term exposure to how many will be affected by corrosion, so proposal can choose hartz alloy B or C hartz alloy material.
Part of lining material selection: choose hard rubber, commonly used to weak resistance to corrosion medium, generally weak acid, alkali resistance, solvent resistance. If according to the requirement of the condition can also choose to better ptfe material corrosion, but the latter is more expensive than the former.
All in all, different capable person according to the working condition requirements for electrodes and the lining of electromagnetic flowmeter, don't have to choose the most expensive, choosing the appropriate is the purpose of economic and durable, is right.