Sodium Silicate(Water Class) CAS 1344-09-8

Factory Supply Sodium Silicate(Water Class) CAS 1344-09-8 with Best Price

  • Appearance: Coloress to yellow liquid
  • Purity: 99. 0%min
  • Stock: In stock
  • Sample: Available
  • Zhishang Chemical: Sodium Silicate Supplier & Manufacturer

Basic Info

What is Water Glass?

Water glass is an aqueous solution of silicate, which is as crystal clear as glass but as fluid as water. It is a soluble alkali metal silicate material composed of a combination of alkali metal oxides and silica.

Water glass plays an important role in industry, agriculture, technology and other fields. As a binder, water glass has occupied a place in the industrial field since its inception. It can be used to block the sewage leaked from the Fukushima nuclear power plant, or to repair cracks in brick walls; it also has anti-corrosion and acid resistance properties. , is an important material for acid-resistant floors and acid-resistant pools in industrial buildings; painting concrete pavements with water glass can also increase the frost resistance and water resistance of the pavement.

Common water glasses include sodium silicate water glass and potassium silicate water glass.


Sodium Silicate Uses

Sodium silicate is widely used in almost all sectors of the national economy. In the chemical industry system, it is used to manufacture various silicate products such as silica gel, white carbon black, zeolite molecular sieve, sodium metasilicate pentahydrate, silica sol, layered silicon and instant powdered sodium silicate, potassium sodium silicate, etc. Basic raw material for silicon compounds. In economically developed countries, a series of deep-processed products using sodium silicate as raw material have developed to more than 50 types, some of which have been used in high-tech, precision and cutting-edge technology fields.

  • In light industry, it is an indispensable raw material for detergents such as washing powder and soap, as well as a water softener and sedimentation aid.
  • Sodium silicate used in the textile industry to aid dyeing, bleaching and sizing.
  • Widely used in casting, grinding wheel manufacturing and metal preservatives in the machinery industry.
  • Sodium silicate used in the construction industry to manufacture quick-drying cement, acid-resistant cement waterproof oil, soil solidifier, refractory materials, etc.
  • In agriculture, silica fertilizer can be produced.

In addition, it is used as a silicon-aluminum catalyst for petroleum catalytic cracking, a filler for soap, an adhesive for corrugated paper, a high temperature resistant material such as a laboratory crucible, a metal preservative, a water softener, a detergent additive, a refractory material and ceramic raw material, and a bleaching agent for textiles. Dyeing and slurry, mining mineral processing, waterproofing, leakage plugging, wood fire protection, food preservation and adhesive manufacturing, etc.

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Application of Sodium Silicate

Sodium silicate is the most widely developed product among inorganic silicon compounds. It has been used for more than 100 years, and its application scope has penetrated into almost every sector of the national economy.

Sodium silicate is the most valuable filler in the soap industry. Incorporating sodium silicate into laundry soap can buffer the alkalinity of laundry soap, reduce the loss of laundry soap in water, enhance washing ability and prevent soap rancidity; Sodium silicate plays the role of washing aid, anti-corrosion and foam stabilization in synthetic detergents; it can be used as filler in papermaking; it is used to make silica gel and silica gel; it is used as a binder in the foundry industry to bond sand and clay. Make various casting molds and cores that people need; water glass will form alkali metal silicate and silica gel films on the metal surface to protect the metal from corrosion by external acids, alkalis, etc.; Used as a binder to bond glass, ceramics, asbestos, wood, plywood, etc.; used in the manufacture of refractory materials, white carbon black, acid-resistant cement; used in the textile industry as slurry, impregnating agent, and in the dyeing and embossing of textiles. Used as a fixing agent and mordant, and for weighting silk fabrics; water glass is added to leather production, and its dispersed colloidal silica is used to produce soft leather; in the food industry, it can be used to preserve eggs to prevent microorganisms from entering. The gaps in eggshells cause deterioration; in the sugar industry, water glass can remove pigments and resins from sugar liquid; in addition, sodium silicate has important uses in medical bandages, battery manufacturing, welding rod manufacturing, steelmaking and other industries.

  1. Application of sodium silicate in cold iron rust prevention: Dilute sodium silicate with a modulus of 2.0 to 2.8 (for 2.4) with water, stir thoroughly and let it stand, retaining the supernatant liquid as an anti-rust liquid. Soak the rusted and decontaminated cold iron in the above solution. After taking it out, let the excess solution flow down automatically and let it dry naturally. The treated cold iron can be stored indoors for 1 to 2 months without rusting, and can be used freely during this period.
  2. Alkaline cleaning solution based on sodium silicate: The alkaline cleaning solution using sodium silicate as the main corrosion inhibitor has a better desalination and cleaning effect on iron artifacts. Silicates react with oxides on the iron surface to generate some Fe2O3, Fe2SiO4 and Fe7SiO10. These newly generated substances have strong corrosion resistance.
  3. The corrosion inhibition effect of sodium silicate on aluminum alloys: Sodium silicate mainly inhibits pitting corrosion of aluminum alloys by promoting passivation of aluminum alloys or forming a conversion film on its surface, thereby reducing the generation of crack sources and improving the corrosion resistance of aluminum alloys. It plays a corrosion inhibition role in sodium chloride solution due to its ability to resist pitting corrosion and corrosion fatigue life. It is an anodic corrosion inhibitor. At the same time, the concentration of sodium silicate has a great influence on the corrosion inhibition effect of aluminum alloy. When 0.20mg/g sodium silicate is added, the aluminum alloy has better corrosion inhibition effect in 3.5% NaCl solution.
  4. Sodium silicate film corrosion inhibitor: When the agent is dissolved in water, the components in the sodium silicate film corrosion inhibitor that have a strong affinity for the metal surface will form a fine, tough ferrosilicon stable film on the metal surface, making it The metal is isolated from the corrosive environment, thereby effectively preventing metal corrosion. In addition, the formed colloidal negative ions absorb positively charged ions in the water to form a fixed layer, and diffuse outward to form a diffusion layer. The dynamic potential generated at the two interfaces increases the supersaturation of the insoluble substances surrounded in the diffusion layer. It is difficult to form crystal nuclei, thereby inhibiting the possibility of scaling. The effectiveness of sodium silicate film corrosion inhibitor is related to factors such as agent concentration, water temperature, water quality, water flow rate, and material.

Despite this, sodium silicate has certain drawbacks when used alone as a corrosion inhibitor. It forms a film slowly, and the film formed has pores and is easy to form silicon scale. Therefore, its use in combination with other substances has become a development trend.

  1. Njff-Ⅱ corrosion inhibitor: Njff-Ⅱ corrosion inhibitor is composed of sodium silicate, molybdate and organic amine. It is a mixed inhibitory corrosion inhibitor that mainly controls the anodic reaction. When the addition amount is 0.2%, the corrosion inhibition rate of 80°C dynamic corrosion of G105 steel test piece in the salt water drilling fluid filtrate reaches 88.19%. Njff-Ⅱ corrosion inhibitor has been widely used in Jiangsu oil fields. According to on-site feedback information, after using this corrosion inhibitor, the replacement cycle of drill pipes and drilling tools is significantly extended.
  2. A copper corrosion inhibitor: mainly sodium silicate, and used in combination with polyepoxysuccinic acid (PESA), benzotriazole (BTA), and Zn2+ when the composition ratio is 60 When ∶40:1:8, it shows a better synergistic effect, and the corrosion inhibition effect on copper is good at this time. This composite water treatment agent is a corrosion inhibitor that mainly inhibits anode corrosion. It is of great significance to study it from the perspective of environmental protection and sustainable development.
  3. High-efficiency corrosion inhibitor used in natural seawater: The corrosion medium is taken from the natural seawater in Lu Xun Park, Qingdao, with a salinity of 32%. During the experiment, the seawater is regularly updated. Place sodium silicate, zinc sulfate, calcium gluconate, alkyl polyglycoside and sodium tungstate in a container in a certain proportion, and stir evenly to obtain a corrosion inhibitor that is low-toxic and highly effective for carbon steel in natural seawater. Compound corrosion inhibitor. Experimental data shows that the critical concentration of the corrosion inhibitor without pre-coating is 280mg/L. At this time, the corrosion inhibition rate for carbon steel is 93.8%, and the surface of the sample is as bright as before, with no local corrosion; the corrosion inhibitor after pre-coating The critical concentration drops to 210 mg/L, and the corrosion inhibition rate of carbon steel is 93.1%.
  4. Carbon steel-copper composite system corrosion inhibitor: Mainly sodium silicate, and the compound corrosion inhibitor with polyaspartic acid, benzotriazole, and sodium molybdate is a composite type that mainly inhibits anode corrosion. Corrosion inhibitor, has good corrosion inhibition effect on carbon steel-copper composite system. When the total concentration of corrosion inhibitor is 50.5 mg/L and the ratio is 60:20:1:20, the corrosion inhibition effect is achieved.
  5. Compound corrosion inhibitor in high Cl-concentration environment: After sodium silicate and sodium molybdate are combined, the toxicity of the corrosion inhibitor is reduced. The precipitation film formed by sodium silicate makes up for the defects of the passivation film formed by sodium molybdate, thereby forming a complete and dense protective film layer on the surface of the material to prevent the occurrence and progression of corrosion. In an environment with high Cl- concentration, this corrosion inhibitor can still effectively prevent the migration of Cl- through the film layer to the metal surface and inhibit metal corrosion.
  6. Aluminum-silicon combined corrosion inhibitor Aluminum-silicon combined corrosion inhibitor: consists of pre-film liquid and sealing liquid. After pre-coating the carbon steel in water with an aluminum-based composite corrosion inhibitor, it is transferred to water containing sodium silicate for sealing treatment. A considerable amount of silicon dioxide is deposited on the original aluminum hydroxide film, automatically repairing the film defects. The corrosion resistance of the aluminum corrosion inhibition film is further improved. The aluminum-silicon combined corrosion inhibitor not only has a good corrosion inhibition effect in fresh water, but also has a good corrosion inhibition effect in seawater and higher-temperature salt water.
  7. Composite corrosion inhibitor for aluminum alloy in hydrochloric acid medium: The corrosion inhibitor compounded by ammonium molybdate, sodium silicate and tungsten tungsten in a certain proportion is non-phosphorus and non-chromium for cold-rolled aluminum plates in 1mol/LHCl. Highly efficient compound corrosion inhibitor. When the total concentration is 10.6mg/L, and the composite ratio of ammonium molybdate, tunglottropine and sodium silicate is 2.375:468.750:1.000, the corrosion inhibition rate reaches 99.91%. In addition, there are many studies on the use of sodium silicate compounded with other substances to form corrosion inhibitors with different functions.

What is the stabilization principle of sodium silicate? What factors should be paid attention to during use?

Stability principle of sodium silicate:

  1. Pure sodium silicate has no stabilizing effect in the bleaching solution of deionized water because it is an alkaline substance that can increase the pH of hydrogen peroxide and cause the activation of hydrogen peroxide. Therefore, hard water can be used when bleaching hydrogen peroxide. If soft water is used, it must Add 0.1~0.2g/L magnesium sulfate.
  2. Sodium silicate can only play a stabilizing role in hard water bleaching solution. The value of sodium silicate lies in its ability to remove rare metal salts. It forms magnesium silicate micelles in hard water and can adsorb HOO- and Cu ( OH)4]2- complex ion, which causes heavy metal ions to lose their catalytic activity and inhibits the decomposition of hydrogen peroxide.
  3. In order to obtain the most effective stabilizing effect, magnesium sulfate can be added, and the resulting magnesium silicate is the most effective compound.

Disadvantages of sodium silicate as hydrogen peroxide stabilizer:

  1. Sodium silicate is a silicate, which easily precipitates into the fibers, causing the fabric to feel rough and hard.
  2. Silicon scale will be deposited in the machinery and pipelines. After a certain period of time, it will peel off from the attachment point and combine with the dye, forming silicon spots on the fibers.
  3. Silicon scale is insoluble in water and difficult to remove.
  4. In fact, when sodium silicate is in soft water, high pH, and high temperature, it is not only unsuitable as a stabilizer, but is even an accelerator for the initial generation of oxygen from the decomposition of hydrogen peroxide. This is often ignored by factories during use.
  5. Sodium silicate can also precipitate the polyvinyl alcohol slurry remaining on the fabric or in the liquid brought from the previous processing step. This precipitate is hard and rubbery and is difficult to dissolve again.


  1. A concise dictionary of fine chemicals
  2. Furness, Rex (1922-09-30). “Sodium silicate as an adhesive”Journal of the Society of Chemical Industry
  3. Gerard Lagaly, Werner Tufar, A. Minihan, A. Lovell “Silicates” in Ullmann’s Encyclopedia of Industrial Chemistry, Wiley-VCH, 2005.

Sodium Silicate Supplier and Manufacturer

As a sodium silicate supplier and manufacturer with a strict standard product quality system certificate, Zhishang Chemical has long been providing the best sodium silicate raw materials to customers all over the world.

Over the years, relying on professional team experience and customer-centric team concept to meet customer needs in a timely manner, our company enjoys a high reputation in the world. At present, our company has served more than 6,000 customers and has established long-term cooperative relations with customers from many countries.

If you have a demand for sodium silicate and related products, please contact our service staff Zhishang Chemical – White directly, and we will provide you with high-quality products at the best price.

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