Corrosion inhibitors are chemicals that slow down the corrosion of metals when added to a medium that comes into contact with the metal. They are used in various applications to protect metals from the damaging effects of corrosion, which can lead to reduced structural integrity, increased maintenance costs, and a shortened service life of equipment and structures.

Corrosion inhibitors work through different mechanisms, such as forming a protective film on the metal surface, adsorbing onto the metal to prevent corrosive agents from making contact, or by altering the chemical environment to make it less conducive to corrosion.

Some common types of corrosion inhibitors include:

1. Anodic Inhibitors: These inhibitors passivate the anodic areas of the metal surface, slowing down the oxidation process.

2. Cathodic Inhibitors: They protect the cathodic areas by reducing the reduction reaction rate.

3. Volatile Corrosion Inhibitors (VCIs): These are typically used in packaging and can vaporize and condense on metal surfaces to provide protection.

4. Organic Inhibitors: Such as amines, amides, and nitriles, which can form a protective layer on the metal surface.

5. Inorganic Inhibitors: Such as chromates, phosphates, and silicates, which can also form protective films.

Specific examples of corrosion inhibitors include:

• BTA (Benzotriazole): Often used in copper systems to prevent corrosion.

• TTA (Tolyltriazole): Effective for copper and copper alloy protection, as mentioned in the provided search results​

• MBT (2-Mercaptobenzothiazole): Another effective inhibitor for copper systems, which can be used in combination with TTA for enhanced protection

Corrosion inhibitors are essential in industries such as oil and gas, where they are used in pipelines and storage tanks, in cooling systems to prevent fouling and corrosion, and in the automotive industry to protect various metal components. The selection of a corrosion inhibitor depends on the specific application, the metal being protected, the environmental conditions, and the desired level of protection.

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