Phosphate flowmeter | The unit of measurement for lithium iron phosphate on the polar core is inaccurate

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1. How to choose the appropriate electromagnetic flowmeter lining?

The following is what Baidu left behind before, you can refer to it. The selection of lining materials for electromagnetic flow meters should be based on the corrosiveness, wear resistance, and thermal conductivity of the measured medium. Hard/soft rubber can withstand the corrosion of general weak acids and alkalis, and can withstand the temperature of 65 ℃. Soft rubber oil has wear resistance, and polytetrafluoroethylene can almost withstand the corrosion of strong acids and alkalis other than phosphoric acid. The medium temperature can reach 130 ℃, but it cannot be worn. Polyurethane rubber has good wear resistance, but it is not resistant to acid and alkali corrosion, and has poor temperature resistance. The medium temperature is less than 65 ℃ The reference table is as follows: The main functional range of lining materials is hard rubber. 1. Hydrochloric acid, acetic acid, oxalic acid, ammonia water, phosphoric acid at room temperature, as well as 50% sulfuric acid, sodium hydroxide, and potassium hydroxide.

2、 Avoid strong oxidants

1. Below 65 ℃

2. General salt, alkali, salt solution soft rubber

1. Has good elasticity and wear resistance.

2、 Resistant to corrosion in general low concentration acid, alkali, and salt media.

3、 Not resistant to corrosion by oxidizing media.

1、 Below 65 ℃

2. Testing general water, sewage, mud, and slurry PTFE modified PTFE

1. The most chemically stable material in plastics, capable of withstanding boiling hydrochloric acid, sulfuric acid, and nitric acid. It can also withstand concentrated alkali and organic solvents.

2、 Poor wear resistance an

2. Selection of electrode materials for electromagnetic flow meters

The selection of electrode materials for electromagnetic flow meters needs to be determined comprehensively based on the corrosiveness, temperature, and wear characteristics of the measuring medium. The following is a summary of the characteristics and applicable scenarios of commonly used electrode materials

1. Corrosion resistance of 316L stainless steel: suitable for water, sewage, and media containing slightly corrosive components (such as inorganic acids and organic acids). Applicable scenarios: Measurement of clean water or low corrosive liquids. In situations where cost is sensitive and the corrosiveness of the medium is weak. Restrictions: Not resistant to highly corrosive media (such as concentrated hydrochloric acid, high-temperature sulfuric acid)

2. Hastelloy C (HC) Corrosion resistance: oxidation resistance Acid: nitric acid, mixed acid, chromic acid and sulfuric acid mixture. Oxidation resistant salts and solutions containing oxidants (such as hypochlorite and seawater). Applicable scenario: Measurement of oxidizing acid solutions in the chemical industry. Seawater or oxidizing environments containing chloride ions. Limitation: Not applicable to non oxidizing acids (such as hydrochloric acid)

3. Corrosion resistance of Hastelloy B (HB): Resistant to all concentrations of hydrochloric acid below boiling point. Resistant to non oxidizing acids such as sulfuric acid, phosphoric acid, hydrofluoric acid, and organic acids. Alkali resistant and non oxidizing salt solution. Applicable scenarios

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