What are the types of corrosion?

What are the types of corrosion?

Intergranular corrosion is generally considered to be caused by the segregation of impurities at the grain boundaries or by enrichment or depletion of one of the alloying elements in the grain boundary areas. … The alloy is heated to a temperature of about 1,060 °C to 1,120 °C and then water quenched.

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