How to choose the material of electromagnetic flowmeter correctly as a common flow meter, the material choice is also an important factor.In the electromagnetic flowmeter, only the electrode and the measuring tube are in contact with the medium, so according to the characteristics of different media, it is necessary to choose the right electrode and lining material.

General electrode materials can be divided into the following types:

Stainless steel (0Cr18Ni12Mo2Ti).Suitable for nitric acid, sulfuric acid less than 5% at room temperature, boiling phosphoric acid, formic acid, alkali solution, sulfurous acid, sea water, acetic acid under certain pressure.

2. Hahn alloy B and Hahn alloy C.Can be used for sea water, salt water.

3. Titanium.Suitable for seawater, all kinds of chlorides and chloric acid, oxidizing acid (including fuming nitric acid), organic acid, alkali, etc.

4. Tantalum.In addition to hydrofluoric acid, fuming sulfuric acid, alkali other chemical media, including boiling point hydrochloric acid, nitric acid and < 175℃ sulfuric acid can be used.

5. Platinum.Can be used for all kinds of acid, alkali, salt, but does not include aqua regia.

Another important material choice of the electromagnetic flowmeter is: how to accurately select the lining material.It is important to note that the lining material should be selected according to the erodibility, abrasion and temperature of the tested medium.

1. Rubber.Excellent elasticity, high tensile force, good wear resistance, general weak acid and alkali corrosion resistance, water, sewage, mud and pulp can be measured.

2. Polyurethane.Has the extremely wear-resisting function, the acid-resisting, the alkali function is poor, can measure the neutral strong wear coal slurry, the mud and the mineral slurry.

3. Teflon.The hydrochloric acid that bears boiling, sulfuric acid, nitric acid, aqua aqua, concentrated alkali and all sorts of organic solvent, wear-resisting function is good, adhesion function is poorer.

The above is about the choice of electromagnetic flowmeter material, different media have different characteristics, do not have to choose * expensive, choose the right is economic and durable.