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Daily Quiz (16)

True or false: According to Lydia Frenzel, the well-known industry expert on waterjetting, there is no distinction between flash rust and rust back.

True or false: White rust develops on all non-ferrous metals.

True or false: Lydia Frenzel says that flash rust and rust back are two terms for the same phenomenon.

The failure mode called “scaling” applies to what material type?

True or false: In SSPC’s rust grade scale, a rust grade of 10 indicates that greater than 50 percent of the steel surface is rusted.

What is another name for “wet storage stain”?

True or false: White rust is an iron oxide that forms naturally on ferrous metals in response to normal weathering.

True or false: Wet storage stain need not be removed from galvanizing before coatings are applied.

White rust appears on which of the following substrates?

True or false: No stains of rust, mill scale, or old coatings are allowed after abrasive blast cleaning to SSPC-SP 5.

How does one surface preparation industry expert, Dr. Lydia Frenzel, differentiate between flash rust and rust back?

What happens to the condition of a steel substrate when waterjet cleaning is used to remove rust or existing coatings?

What is another name for wet storage stain?

What is another name for “white rust?”

Where does white rust form?

What is white rust?


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