“Those
dreams that on the silent night intrude, and with false flitting
shapes our minds delude ... are mere productions of the
brain. And fools consult
interpreters in vain.” Jonathan Swift
Corrosion Forms
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Recommendations for sound corrosion control into components and systems
require that a special care is given to the forms or types of corrosion that
can occur. However, one has to realize that one type of corrosion can lead into
a series of worsening reactions where other types of corrosion attack can become
the dominating factors. A simple galvanic situation aggravated by the presence
of an electrolyte can cause devastating effects as was observed in the
supporting saddles
of the Statue of Liberty during its restoration. The different forms of corrosion
represent corrosion phenomena categorized according to their appearance:
Group 1 -readily identifiable by ordinary
visual examination
Group 2 - may require supplementary means of examination
Group 3 - verification is usually required by microscopy
(optical, electron microscopy etc.)