Chemical substances may cause corrosion or damage to the vacuum gauge

1、 Acidic substances

1. Hydrochloric acid: It has strong corrosiveness and can react with many metals and non metals. If the vacuum gauge comes into contact with hydrochloric acid vapor or hydrochloric acid solution, it may cause corrosion of metal parts and damage the structure and performance of the vacuum gauge.

2. Sulfuric acid: Concentrated sulfuric acid has strong oxidizing and corrosive properties, and can react with most metals to generate sulfates and release heat. Dilute sulfuric acid also has a certain degree of corrosiveness, which may cause damage to the metal components and sealing materials of the vacuum gauge.

3. Nitric acid: a strong oxidizing acid that has a strong corrosive effect on metals. Nitric acid vapor or solution may corrode the metal components of the vacuum gauge, affecting its accuracy and reliability.

2、 Alkali substances

1. Sodium hydroxide (caustic soda): a strong alkali that can react with many metals such as aluminum, zinc, etc. to form hydroxides and release heat. If the vacuum gauge comes into contact with sodium hydroxide, it may cause corrosion of metal parts and damage to the vacuum gauge.

2. Potassium hydroxide: Similar in properties to sodium hydroxide, it has strong corrosiveness. Can react with materials such as metal and glass, causing damage to the vacuum gauge.

3、 Organic solvents

1. Acetone: Although acetone is relatively stable at room temperature, it may undergo chemical reactions under certain conditions, such as high temperature, high pressure, or contact with certain substances. Acetone may dissolve some sealing materials and plastic parts of vacuum gauges, causing leaks and damage.

2. Ethanol: Ethanol may react with certain metals under certain conditions, especially in the presence of water. In addition, ethanol vapor may affect the measurement accuracy of the vacuum gauge.

3. Benzene: Benzene is a toxic organic solvent that has a dissolving effect on many plastic and rubber materials. If the vacuum gauge comes into contact with benzene, it may cause damage to the sealing material and affect the performance of the vacuum gauge.

4、 Halogens and their compounds

1. Chlorine gas: It has strong oxidizing and corrosive properties and can react with many metals and non metals. Chlorine gas may corrode the metal components of the vacuum gauge, damage the sealing structure, and affect the normal operation of the vacuum gauge.

2. Fluorine gas: It is an extremely reactive gas with corrosive properties. Fluorine gas can react with most substances, including metals, glass, and plastics. If the vacuum gauge comes into contact with fluorine gas, it may suffer serious damage.

3. Hydrogen chloride: In humid environments, hydrogen chloride forms hydrochloric acid, which has a corrosive effect on metals. Hydrogen chloride vapor may enter the interior of the vacuum gauge, causing corrosion and damage.