die Eigenschaften und den Anwendungsbereich der verschiedenen Arten von Rostschutzmitteln zu verstehen

Rust inhibitor is a chemical agent that can prevent metal materials from rusting due to oxidation. According to their usage and basic principles, rust inhibitors can be divided into three categories: corrosion inhibiting rust inhibitors, coating rust inhibitors, and volatile rust inhibitors.

Corrosion inhibiting rust inhibitors form a relatively stable chemical film on the surface of metals to prevent corrosive media such as oxygen, moisture, and chloride ions from corroding the metal. This type of rust inhibitor can be divided into inorganic corrosion inhibiting rust inhibitors and organic corrosion inhibiting rust inhibitors.

Inorganic corrosion inhibiting rust inhibitors are mainly metal salts, such as sodium chromate, potassium chromate, potassium ferrocyanide, etc. These inorganic salts can form a dense protective film with the metal surface in solution, hindering further oxidation corrosion. However, such rust inhibitors often require heating during use and are generally only suitable for inorganic acidic environments.

Organic corrosion inhibiting rust inhibitors are a type of organic compounds that target different metals. These organic molecules can form a protective film by adsorbing on metal surfaces, effectively preventing corrosion of metals by oxygen, moisture, and chloride ions. Organic corrosion inhibiting rust inhibitors can be classified into pyridine derivatives, plant extracts, organic amine salts, etc. based on their chemical structure and affinity. Various organic corrosion inhibiting rust inhibitors have different application ranges and corrosion inhibition effects under different metal materials and environmental conditions.

Coating type rust inhibitor is a rust inhibitor that covers the metal surface with a layer of rust proof coating. This type of rust inhibitor can be divided into three types: oil-based coating type, solvent based coating type, and water-based coating type.

Oil based coating rust inhibitors mainly form a lubricating film on metal surfaces by coating oil-based lubricants or mineral oils to prevent corrosion of metals in contact with moisture. The advantage of this type of rust inhibitor is that it is easy to use and has a good corrosion inhibition effect. However, due to the viscosity of oil-based coating rust inhibitors at low temperatures, their applicability is somewhat limited.

Solvent based coating rust inhibitors are based on organic solvents and form a thin film on the metal surface to prevent metal corrosion. The characteristics of this type of rust inhibitor are thin coating, fast drying, and good corrosion resistance. However, due to the presence of volatile organic solvents in solvent based coating rust inhibitors, attention should be paid to preventing the volatilization of solvents from polluting the environment during use.

Water based coating rust inhibitors are based on water and form a protective film on metal surfaces by coating water-based colloids to prevent metal corrosion. The advantages of this type of rust inhibitor are environmental friendliness and ease of operation. However, due to the thin protective film thickness of water-based coating rust inhibitors, their corrosion inhibition effect on some special metal materials may not be ideal.

Volatile rust inhibitor is a compound that evaporates solid or liquid into gas, forming a film like substance through the gas phase of the volatile substance to prevent rust on metals. This type of rust inhibitor can be classified into nitro nitrogen compounds, amine compounds, etc. based on the properties of the volatile substances.