In the industrial production process due to the production of small or very strong corrosive media measurement.Corrosion is the destruction of metals by chemical action in their environment.All metals and alloys may be resistant to corrosion in certain environments, but are sensitive to corrosion in others.

Whether or not the anticorrosive electromagnetic flowmeter can measure the corrosive medium must be done well the anticorrosive measures of the flowmeter.

(1) the brief is to process and the dielectric properties, on the basis of deep understanding, choose the measurement scheme, also achieve the purpose of measuring or to control the production process, to avoid the corrosion resistance of parts, and choose in lighter parts of the subject, and even the kinds of changes are adjustable parameters, the flow rate constant value control system with a liquid level regulation or other suitable variables instead of adjustment, so as to avoid the problem of flow measuring corrosion resistance.

(2) for corrosive conductive liquid, electromagnetic flowmeter is used to measure the lining material of the pipe with electromagnetic flowmeter, and its corrosion resistance * is polytetrafluoroethylene;There are also several types of electrode materials that can meet the needs of most corrosive media;Measuring tube diameter from a few millimeters to 3m, a variety of specifications, can meet the needs of a variety of measurement range;If the fluid temperature is also within the allowable range, that would be an ideal choice.But if the fluid does not conduct electricity, the anti-corrosion electromagnetic flowmeter is powerless.

(3) the corrosion of metal caused by regularly changing the corrosive medium of instrument is varied.Some corrosion rate is very fast, that is, comprehensive corrosion;Some corrosion is mild, slow, that is, local corrosion.When using the instrument, replace the instrument according to the corrosion condition and time.

Attachment: anticorrosion electrode electromagnetic flowmeter and lining in the choice of reference:

the choice of electrode material general electrode material in the following:

1. Stainless steel (0 cr18ni12mo2ti).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. Hastelloy B, hastelloy C.Can be used in sea water, salt water.

3. Titanium - suitable for seawater, various chlorides and chlorinated hydrochloric 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 of hydrochloric acid, nitric acid and < 175℃ sulfuric acid can be used.

5. Platinum - can be used in various acids, bases and salts, but not royal water.

The choice of lining material another important material choice of electromagnetic flowmeter is:

how to accurately choose the lining material.It must be noted that the lining material should be selected according to the erosion, abrasion and temperature of the measured medium.

1. Rubber - with excellent elasticity, high breaking force, good wear resistance, resistance to general weak acid and alkali erosion, can measure water, sewage, mud and pulp.

2. Polyurethane - coal, mud and pulp with excellent wear resistance, poor acid and alkali resistance, capable of measuring neutral wear.

3. Polytetrafluoroethylene - resistant to boiling hydrochloric acid, sulfuric acid, nitric acid, royal water, concentrated alkali and a variety of organic solvents, good wear resistance, poor bonding function.