List of testing properties and testing methods of water glass
Water glass, also known as sodium silicate solution, is a colorless transparent inorganic substance composed of sodium silicate and water. Water glass absorbs moisture easily in dry air and forms a solid, which can be used in a variety of industrial and everyday applications. It has excellent properties such as water resistance, acid and alkali resistance, and permeability resistance. It is widely used in construction, waterproofing, bonding, mineral impregnation and other fields. At the same time, water glass can also be used in the production of fertilizer, fireproof materials, pulp and ceramics.
Detection performance
The following are the common performance parameters of water glass and a brief description:
| Performance parameter | Brief description |
|---|---|
| Solid content | The amount of sodium silicate in the solution |
| Relative density | The ratio of the density of solution to the density of water |
| pH value | Ph of water glass solution |
| viscosity | The viscosity of the solution has an important effect on the application of coating, impregnation, etc |
| Permeability resistance | The resistance of water glass coated or impregnated substrates to water and gas penetration |
| Water-retaining property | The amount of water absorbed by the substrate after coating or impregnation reflects the water retention performance of the coating or impregnation |
| Sulfate content | The content of sulfate in water glass solution has an important influence on the use effect in specific application scenarios |
| Chloride content | The content of chloride in water glass solution has limited requirements for some specific applications |
List of testing properties and testing methods of water glass
Detection method
The following is a brief description of the test method for the common performance parameters of water glass:
Solid content: The water glass sample is heated to about 105℃, dried to constant weight, and the ratio of the mass of non-volatile substances to the total sample mass is calculated.
Relative density: the water glass solution is added to the density meter, the density of the solution is measured, and the relative density is calculated.
pH value: Use PH meter and other equipment to measure the pH of water glass solution, evaluate its stability and application effect.
Viscosity: The use of viscometers and other equipment to measure the viscosity of water glass solution has an important impact on the application of specific applications, such as coating, impregnation, etc.
Permeability resistance: Use gas permeability meter, water immersion tester and other equipment to assess the water and gas penetration resistance of the water glass coated or impregnated substrate.
Water retention: The use of weighing method and other equipment to measure the water absorption of water glass coating or impregnated substrate, reflecting the water retention performance of the coating or impregnated.
Sulfate content: Use spectrophotometer and other equipment to measure the content of sulfate in water glass solution.
Chloride content: Use devices such as chloride ion selective electrodes to measure the chloride content in water glass solution.
The North and South tide reminds you: different performance parameters may require different test methods and equipment, and there may be some industry standards and specifications, for the performance of water glass testing, should also be selected according to the actual needs of the corresponding detection methods and standards. At the same time, it is necessary to strictly control the test conditions and standardized operations during the experiment to ensure the accuracy and reliability of the test.