discuss the following types of corrosion; 1) pitting corrosion 2) waterline corrosion
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Pitting Corrosion is the localized corrosion of a metal surface confined to a point or small area, that takes the form of cavities. Pitting corrosion 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. The following photo shows pitting corrosion of a SAF2304 duplex stainless steel after exposure to 3.5% NaCl solution.
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