Higher environmental protection requirements

Time：

2021-11-12

The main problem existing in domestic rust prevention products is that the anti-corrosion effect of rust inhibitors during the storage period of steel products is not ideal. After the "Sixth Five-Year Plan" and "Seventh Five-Year Plan" breakthroughs, China is now capable of producing high-quality rust inhibitors and has initially formed its own series of rust prevention materials on this basis. Most factories and industries have formulated effective anti-rust process regulations and anti-rust management systems that are in line with the actual conditions of the industry and their own factories. Some of them are even relatively advanced. And a number of cleaning, rust prevention and packaging production lines have been self-made or introduced. There are already a number of manufacturers of anti-rust process equipment and those capable of producing testing instruments that meet the standard requirements. Rust inhibitors have the advantages of good application effect, convenient use, low cost, easy construction, simple operation and easy removal, and have been widely used at home and abroad.

Advantages of rust inhibitors

The function of dispersant

Advantages of rust inhibitors

The function of dispersant

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Addition curve method

Gradually drop a relatively concentrated pigment fraction solution into a thick water slurry made of a certain amount of pigment/pigment mixture under stirring, and measure the viscosity each time it is added. The lowest point of the quantity/viscosity curve used as a pigment dispersant represents the optimal dosage of the dispersant.

2025

06-05

Daniel Flow point determination method

Gradually add the water solvent of the dispersant to a certain amount of pigment/pigment mixture with a dropper, and carefully grind it evenly with a small scraper until the ground pigment paste can flow down from the scraper. Calculate the ratio of the pigment fraction to the pigment.

2025

06-05

The principle of double electric layers

The dispersants used in water-based coatings must be water-soluble and they are selectively adsorbed onto the interface between the powder and water. The commonly used type is anionic. They ionize in water to form anions and have certain surface activity, which are adsorbed by the surface of the powder. After the powder particles adsorb the dispersant on their surface, a double electric layer is formed. The anions are closely adsorbed by the particle surface and are called surface ions. Ions with opposite charges in a medium are called counterions. They are electrostatically adsorbed by surface ions. Some of the counterions are relatively tightly bound to the particles and surface ions, and they are called bound counterions. They become a moving whole in the medium, carrying a negative charge, while another part of the counterions surround them. They are called free counterions and form a diffusion layer. In this way, a double electric layer is formed between the surface ions and the counterions.

2025

06-05

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