What type of corrosion is exfoliation?

What type of corrosion is exfoliation?

intergranular corrosion
Exfoliation corrosion is a form of intergranular corrosion which involves selective attack of a metal at or adjacent to grain boundaries. In this process, corrosion products formed force metal to move away from the body of the material, giving rise to a layered appearance.

What is meant by exfoliation?

1 : to split into or give off scales, laminae, or body cells. 2 : to come off in thin layers or scales. 3 : to grow by or as if by producing or unfolding leaves.

What is oxidation corrosion?

22.5. Oxidation is defined as a corrosion reaction in which the corroded metal forms an oxide. Usually, this reaction is with a gas containing oxygen, such as air.

What is corrosion explain their types?

Corrosion is a natural process that converts a refined metal into a more chemically stable form such as oxide, hydroxide, carbonate or sulfide. This type of damage typically produces oxide(s) or salt(s) of the original metal and results in a distinctive orange colouration.

What is rust formula?

Rust is apparently a hydrated form of iron(III)oxide. The formula is approximately Fe2O3•32H2O, although the exact amount of water is variable.

What is corrosion formula?

Iron in presence of moist air is oxidized to give rust. This process is known as corrosion. Hydrated Iron (III) oxide is known as rust. The chemical formula is Fe2O3. xH2O.

What is exfoliation corrosion?

Exfoliation corrosion is a form of intergranular corrosion which involves selective attack of a metal at or adjacent to grain boundaries. In this process, corrosion products formed force metal to move away from the body of the material, giving rise to a layered appearance.

What is exfoliation?

Exfoliation is a special type of intergranular corrosion that occurs on the elongated grain boundaries. The corrosion product that forms has a greater volume than the volume of the parent metal.

What is intergranular attack and exfoliation corrosion?

Intergranular attack (IG) and exfoliation corrosion (EC) have a detrimental impact on the structural integrity of aircraft structures of all types. Understanding the mechanisms and methods for dealing with these processes and with corrosion in general has been and is critical to the safety of critical components of aircraft.

What does Nace stand for?

S. Szklarska, Pitting Corrosion of Metals, National Association of Corrosion Engineers (NACE), Houston, Tex, USA, 1986. J. E. Hatch, Ed., Aluminum Properties and Physical Metallurgy, American Society for Metals (ASM), Metals Park, Ohio, USA, 1984.