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What is pitting in engineering?

Pitting is when there are small holes starting to appear in steel often caused by corrosion/rust


Different types of corrosion?

Pitting Corrosion is the localized corrosion of a metal surface confined to a point or small area, that takes the form of cavities. Pitting is one of the most damaging forms of corrosion. Pitting factor is the ratio of the depth of the deepest pit resulting from corrosion divided by the average penetration as calculated from weight loss. This following photo show pitting corrosion of SAF2304 duplex stainless steel exposed to 3.5% NaC1 solution.Pitting corrosion forms on passive metals and alloys like stainless steel when the ultra-thin passive film (oxide film) is chemically or mechanically damaged and does not immediately re-passivated. The resulting pits can become wide and shallow or narrow and deep which can rapidly perforate the wall thickness of a metal


Can you call the corrosion of all metals as rusting?

No. Rust (iron oxide) only occurs in metals containing iron. A couple examples of different types of corrosion are galvanic corrosion and chloride pitting corrosion.


What has the author Gino Palumbo written?

Gino Palumbo has written: 'Pitting corrosion of incoloy 800'


List 6 types of corrosion that effect aircraft?

Galvanic, pitting, concentration cell, intergranular, stress cracking, Uniform etch, crevis corrosion


What is the pitting potential give examples of factors which influence the value of the pitting potential?

Pitting potential is the potential where the pitting start and this is noticed when the current is suddenly increased that also mean below this value, now pitting corrosion will initiate Many parameters can effluence the pitting potential such as Temperature, halides ions, surface finishing of the alloy and also state of the electrolyte , is it flowing or stagnant.


In which kind of environment pitting corrosion happen?

Pitting corrosion generally happens in an oxygen deficient environment where the metal is surrounded by an ionic solution with chloride, bromide, or fluoride ions. A scratch in the metal under these conditions does not allow the metal [such as stainless steel] to reform the thin oxide layer which would normally protect the surface.


What are some examples of corrosion?

Iron and steel rusting is an example of corrosion. Copper pitting or the green patina one sees on copper roofs are also examples of corrosion. Stress Cracking is also considered an example of corrosion.


What has the author S Mat written?

S. Mat has written: 'Pitting and stress corrosion cracking of stainless steels in sour environments'


How does phosphoric acid affect the corrosion resistance of stainless steel?

Phosphoric acid can decrease the corrosion resistance of stainless steel by promoting the formation of localized corrosion, such as pitting and crevice corrosion. This is due to the acid's ability to break down the protective passive film on the stainless steel surface, making it more susceptible to corrosion.


What is the most common type of corrosion found on aluminum and magnesium alloys?

The most common type of corrosion found on aluminum and magnesium alloys is galvanic corrosion, which occurs when these metals come into contact with a more noble metal in the presence of an electrolyte. This causes accelerated corrosion of the aluminum or magnesium.


What has the author Tarja Laitinen written?

Tarja Laitinen has written: 'Thiosulfate pitting corrosion of stainless steels in paper machine environment' -- subject(s): Corrosion, Papermaking machinery, Stainless Steel, Steel, Stainless, Thiosulphates

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