How long can the electrode of the concentrated alkali flowmeter | electromagnetic flowmeter be used?

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1. How to correctly choose the material of electromagnetic flowmeter @ "Servo and Motion Control" magazine?

As a commonly used flow measurement instrument, the selection of material for electromagnetic flowmeter is also an important factor. Due to the fact that only the electrode and the interior of the measuring tube are in contact with the medium in the electromagnetic flowmeter, the correct electrode and lining material need to be selected according to the characteristics of different media.

1. Regarding the selection of electrode materials, there are generally several types of electrode materials: 1 Stainless steel (0Cr18Ni12Mo2Ti). Suitable for nitric acid, sulfuric acid with less than 5% at room temperature, boiling phosphoric acid, formic acid, alkaline solutions, and sulfite, seawater, and acetic acid under certain pressure. 2. Hastelloy B and Hastelloy C. Can be used for seawater and saltwater. 3. Titanium. Suitable for seawater, various chlorides and hypochlorous hydrochloric acid, oxidizing acids (including fuming nitric acid), organic acids, bases, etc. 4. Tantalum. Other chemical media, including boiling point hydrochloric acid, nitric acid, and sulfuric acid below 175 ℃, can be used except for hydrofluoric acid, fuming sulfuric acid, and alkali. 5. Platinum. Can be used for various acids, bases, and salts, but does not include aqua regia.

Secondly, another important material selection for electromagnetic flow meters is how to accurately select the lining material.

. It must be noted that the lining material should be selected based on the corrosiveness, wear resistance, and temperature of the tested medium. 1. Rubber. It has excellent elasticity, high tensile strength, good wear Concentrated alkali flowmeter

resistance, and resistance to general weak acids and alkalis. It can be used to measure water, sewage, mud, and slurry. 2. Polyamide. Coal slurry, mud and slurry with excellent wear resistance, poor acid and alkali resistance, and the ability to measure neutral and strong wear. 3. Polytetrafluoroethylene. Resistant to boiling and excessive amounts of hydrochloric acid, sulfuric acid, nitric acid, aqua regia, concentrated alkali, and various organic solvents, with good wear resistance but poor adhesion. The above is about the selection of materials for electromagnetic flow meters. Different media have different characteristics, and it is not necessary to choose the most expensive one. Choosing the appropriate one is the most economical and durable.

Can tantalum electrodes be used for alkali concentrations above 2.40%, as electromagnetic flow meters also require chlorine containing liquids Tantalum electrodes are not effective, as they lack corrosion resistance for sodium hydroxide. Its too expensive to use platinum nanoparticles! HB material can be applied to sodium hydroxide solutions with a concentration of less than 50%. If you want to be safer and have no accidents, let the manufacturer extract your solution and conduct hanging experiments!

3. How long can the electrodes of an electromagnetic flowmeter be used? The normal service life of electromagnetic flowmeter electrodes can reach 5-10 years, which is closely related to factors such as medium, environment, and maintenance. 1. The influence of medium characteristics on electrode life Corrosivity: Corrosive media such as strong acids and bases can accelerate the loss of electrode materials. Even if corrosion-resistant materials such as Hastelloy or t

How long can the electrode of the concentrated alkali flowmeter | electromagnetic flowmeter be used?

1. How to correctly choose the material of electromagnetic flowmeter @ "Servo and Motion Control" magazine?

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