What is the role of sodium silicate in electroplating, and what is the role of adding sodium silicat

Sodium silicate is widely used in the machinery industry for casting, grinding wheel manufacturing and metal preservatives, etc.;

Sodium silicate coats the surface of the material to improve its resistance to weathering.

After the water glass solution is applied or impregnated with the material, it can penetrate into the crevices and pores, and the cured silicone gel can block the capillary channels, improve the density and strength of the material, and thus improve the weathering resistance of the material. However, water glass should not be used to paint or impregnate gypsum products. Because sodium silicate reacts with gypsum to form sodium sulfate (Na2SO4), it crystallizes and expands in the pores of the product, resulting in cracking and damage of gypsum products.

Prepare a quick-setting waterproofing agent.

Water glass can be formulated with a variety of alum to make a quick-setting waterproofing agent, which is used for local emergency repairs such as leakage plugging and caulking. The coagulation speed of this alum-waterproofing agent is very fast, generally a few minutes, of which the four-alum-waterproofing agent does not exceed 1min, so it must be ready to use when used on the construction site.

Anti-corrosion engineering applications.

Modified water glass acid-resistant mud is an important material for acid corrosion resistance, and its main characteristics are acid resistance, temperature resistance, dense impermeability, low cost, and easy to use. It can be mixed into acid-resistant cement, acid-resistant mortar and acid-resistant concrete, which is suitable for anti-corrosion projects of various structures in chemical, metallurgical, electric power, coal, textile and other departments, and is an ideal material for acid storage pools, acid-resistant floors and acid-resistant surface masonry of spinning acid building structures.

Main properties: 1. High adhesion and strength.

The main components of water glass after hardening are silicone gel ( ) and solid, which has a large specific surface area, so it has a high adhesion. However, the quality of the silicate itself, the performance of the batch and the construction and maintenance have a significant impact on the strength.

2. Good acid resistance.

It is resistant to almost all inorganic and organic acids except hydrofluoric acid (HF), hot phosphoric acid and higher fatty acids.

3. Good heat resistance.

The silica mesh skeleton formed after hardening has little decrease in strength at high temperatures, and the heat resistance can reach 1000 when the heat-resistant refractory aggregate is used to prepare water glass mortar and concrete. Therefore, the heat resistance of water glass concrete can also be understood to mainly depend on the heat resistance of the aggregate.

4. Poor alkali resistance and water resistance.

Because it is easy to dissolve in alkali after mixing, water glass cannot be used in an alkaline environment. Similarly, because , NaF and Na2CO3 are soluble in water and not resistant to water, but the hardened water glass can be pickled with a medium concentration of acid to improve the water resistance.

Sodium silicate, commonly known as water glass, has strong adhesion and is to increase adhesion.

Sodium silicate for electroplating?

I've never been exposed to this kind of question.

(1) Buffering. Sodium silicate can maintain the pH value of the solution, that is, it has a buffering effect. It is possible to maintain the alkalinity of the washing liquid, so that the consumption of detergent is reduced.

2) Effect on suspension force, emulsification force and foam stability. After sodium silicate is dissolved in water, the silicic acid produced by hydrolysis forms a colloidal particle group in water, thereby increasing the colloidal properties of the washing liquid and improving the detergency. It also has the effect of increasing the emulsifying power of the washing solution and stabilizing the foam.

3) Effect on the properties of slurry and laundry detergent. In the process of slurry preparation, sodium silicate can adjust the fluidity of the slurry, and can also stabilize sodium tripolyphosphate so that it does not decompose into orthophosphate. In spray drying, sodium silicate can increase the strength, uniformity and free flow of laundry detergent particles, improve the solubility of the finished product, prevent the detergent from clumping and allow the detergent to be preserved at higher moisture.

4) It has a certain protective effect on the fabric.

5) Anti-corrosion effect. Sodium silicate can effectively prevent the corrosive effect of sulfonate and phosphate on metals, especially for aluminum and copper.

6) The effect of matching with sodium carbonate. It is used in combination with sodium carbonate to soften temporary hard water and remove magnesium salts from water.

The dosage of sodium silicate depends on the type of product, and in the household cotton fabric laundry detergent, neutral water glass can be used below 10.

Electroplating rust removal polish, pH buffer.

Dioxide cavity file silicon, sodium oxide, modulus, dense limb repetition.

It must be produced with pure sodium silicate.

Environmentally-friendly electroplating pretreatment solution - two-in-one degreasing and rust removal purification liquid, which can be added repeatedly and recycled, with low cost, no equipment, one-time degreasing and rust removal.

Casting is to inject a dipstick alloy into the mold to cool and solidify the desired shape of the part. So for casting, there need to be two basic elements: 1

Qualified cavity - has a certain strength, can withstand the high temperature of liquid alloy; And it can ensure that the liquid alloy can fill the cavity. 2.The composition is qualified, the temperature is appropriate, and the liquid is returned to Senjin.

The casting process is generally: sand mixing - compacting - trimming - closing the box - pouring (before smelting molten iron - inoculation treatment) - sand removal - cleaning the pouring riser - shot blasting - grinding hair leakage trapped mu thorn - quality inspection - anti-rust treatment - storage. The water glass you mentioned is used in the process of sand mixing.

Generally, more raw materials used in casting are sand, and the sand cannot form a certain shape of the cavity, it needs to have a binder, so that the sand has the effect of cohesion. Water glass is an inorganic chemical binder used in casting production. Water glass is a common name for various polysilicate aqueous solutions, including sodium water glass, potassium water glass, lithium water glass, etc., and sodium water glass is commonly used in casting.

After sodium silicate is dissolved in water, it becomes a viscous liquid, which is what we often call sodium water glass. The sand in casting can usually be reused after the sand is shaken, and the water glass is a one-time consumable, and the casting cost is relatively large.

Generally, it is sodium lauryl sulfate, of course, there are others. You can also contact those additive companies.

The core masterbatch of electroplating degreaser.

1. Powder formula: core masterbatch of electroplating degreaser + sodium silicate = electroplating degreasing powder.

2. Water agent formula: electroplating degreaser core masterbatch + flavor + preservative + water = electroplating degreaser.

The core masterbatch of electroplating degreaser is the latest masterbatch specially developed by Chengdu Hengfeng Hongye Detergent Factory for electroplating degreasing, which has the following characteristics:

1. Special advantages:

1. Strongly dissolve and clean inorganic oil; Lubricating oil, mechanical oil, mineral oil, clutch oil, gear oil, brake oil, engine oil, ink, release oil, compressor oil, refrigeration oil, vacuum pump oil, internal combustion engine oil, bearing oil, guide oil, hydraulic oil, hydraulic transmission oil, metalworking oil, electrical insulating oil, power tool oil, heat conduction oil, anti-rust oil, special occasion oil, turbine oil, quenching oil, fuel oil, drawing oil and other inorganic oils.

2. Strong dissolution and cleaning of organic oils: vegetable oil, animal oil, edible oil and other organic oils.

Second, the production of electroplating degreaser practical ratio (reference, according to the cost adjustment ratio).

1. Powder formula: core masterbatch of electroplating degreaser + sodium silicate = electroplating degreasing powder.

2) Sodium silicate 90-98%.

2. Water agent formula: electroplating degreaser core masterbatch + water + preservative + flavor + pigment = electroplating degreaser.

2) Water 90---98%.

3) Appropriate amount of preservatives.

4) Appropriate amount of flavor.

5) Appropriate amount of pigment.

Third, the production process:

1. Powder formula production process: the core masterbatch of electroplating degreaser + sodium silicate is mixed and stirred evenly in proportion to electroplating degreasing powder.

2. The production process of water agent formula: the core masterbatch of electroplating degreaser + water + preservative + flavor + pigment is mixed and stirred evenly in proportion to be electroplating degreaser.