Steel
Fretting damage in steel can be identified by the presence of a pitted surface and fine 'red' iron oxide dust reminiscent of cocoa powder. Strictly this debris is not 'rust' as its production requires no water. The particles are much harder than the steel surfaces in contact, so abrasive wear is inevitable; however, particulates are not required to initiate fret.
Read more about this topic: Fretting
Famous quotes containing the word steel:
“For every man that Bolingbroke hath pressed
To lift shrewd steel against our golden crown,
God for his Richard hath in heavenly pay
A glorious angel. Then if angels fight,
Weak men must fall; for heaven still guards the right.”
—William Shakespeare (1564–1616)
“You don’t resign from these jobs, you escape from them.”
—Dawn Steel (b. 1946)
“It is not as easy to emigrate with steel mills as it is with the manuscript of a novel.”
—Golo Mann (b. 1909)