Readers ask: What Are The Types Of Corrosion Inhibitors?

Types of Corrosion Inhibitor

  • Cathodic Inhibitor.
  • Anodic Inhibitor.
  • Volatile Corrosion Inhibitor.
  • Mixed Inhibitors.

What is the most common corrosion inhibitor?

The most common inhibitors of this category are the silicates and the phosphates. Such inhibitors will have the more advantage that they control both the cathodic and anodic corrosion reactions.

What are corrosion inhibitors give two examples?

Some examples are chromates, nitrates, molybdates, and tungstate. These inhibitors slows down the cathodic reaction to limit the diffusion of reducing species to the metal surface. Cathodic poison and oxygen scavengers are examples of this type of inhibitor.

What are corrosion inhibitors?

Aluminum oxide, copper carbonate, titanium oxide, and chromium oxide, then, can act as protective coatings, preventing metal corrosion. Inhibitors vary by base metal (for example, zinc is a corrosion inhibitor for copper and aluminum).

What is mixed type of corrosion inhibitor?

Mixed inhibitors are compounds that form a film or precipitate to reduce both the cathodic and anodic reactions. Sodium silicate and phosphates used in domestic water softener salts to prevent rust water are examples.

What are the 3 types of corrosion?


  • Uniform Corrosion. Uniform corrosion is considered an even attack across the surface of a material and is the most common type of corrosion.
  • Pitting Corrosion.
  • Crevice Corrosion.
  • Intergranular Corrosion.
  • Stress Corrosion Cracking (SCC)
  • Galvanic Corrosion.
  • Conclusion.

What are green inhibitors?

Green corrosion inhibitors are biodegradable and do not contain heavy metals or other toxic compounds. Some research groups have reported the successful use of naturally occurring substances to inhibit the corrosion of metals in acidic and alkaline environment.

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What are organic inhibitors?

Organic inhibitors usually designated as ‘ film-forming’, protect the metal by forming a hydrophobic film on the metal surface. The effectiveness of these inhibitors depends on the chemical composition, their molecular structure, and their affinities for the metal surface.

Which of these is the corrosion inhibitor?

The most common inhibitors of this category are the silicates and the phosphates. Sodium silicate, for example, is used in many domestic water softeners to prevent the occurrence of rust water. In aerated hot water systems, sodium silicate protects steel, copper, and brass.

What is water inhibitor?

Corrosion inhibitors are chemical products which, when added to water or to any other process fluid, slow down the rate of corrosion. The effectiveness of most corrosion inhibitors is significantly affected by the water’s chemical properties and by physical conditions such as temperature and flow velocity.

What is acid corrosion inhibitor?

Corrosion inhibitors are cationic and oil wetter’s. This is the mechanism by which they adsorb on a metal surface and form an oil-wet film to protect the iron from exposure to acid. Plating out and oil wetting also occur in the formation, especially on clay minerals.

Is ethylene glycol a corrosion inhibitor?

Corrosion problems with ethylene glycol/water mixtures can be minimized or eliminated by using ethylene glycol that contains inhibitors. Most commercial ethylene glycols sold contain these corrosion inhibitors.

What do you mean by inhibitors?

: one that inhibits: such as. a: an agent that slows or interferes with a chemical action. b: a substance that reduces or suppresses the activity of another substance (such as an enzyme)

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What are inorganic inhibitors?

The anodic type of inorganic inhibitors includes chromates, nitrites, molybdates and phosphates, and the cathodic type includes zinc and polyphosphate inhibitors. For instance, chromates and nitrates are called passivating inhibitors because of their tendency to passivate the metal surface.

What are cathodic and anodic inhibitors?

Cathodic inhibitors are used for slowing down the cathodic reaction. Another example of a cathodic inhibitor includes nickel’s catalyzed redox reaction. 2. Anodic Inhibitor. These are another category of corrosion inhibitors that helps in the formation of a thin preventive oxide layer on the metal’s surface.

What is molybdate inhibitor?

Sodium molybdate, Na2MoO4, is a non-toxic, environment-friendly corrosion inhibitor for the protection of soft-water cooling systems. The agent is classified as anodic inhibitor, but its use requires the presence of oxygen or other oxidizing agents in solution.