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Daily Quiz (15)

True or false: Wet storage stain forms on uncoated stainless steel in tropical climates.

What can cause oil-alkyd coatings to saponify on new galvanizing?

According to a recent JPCL article, the zinc carbonate that forms on weathered galvanizing can remain on the surface and is favorable to subsequent coating adhesion.

According to a recent JPCL article, the most common timing for applying paint onto a newly galvanized surface is between two days and six months after galvanizing.

What name is sometimes given to a coating system comprised of galvanizing together with an organic coating?

What is another name for wet storage stain on galvanized metal?

True or false: SSPC-SP 16 is often specified as part of the surface preparation of new galvanized steel before overcoating.

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

What is the name given to the zinc ammonium chloride solution that cleans and deposits a protective layer on steel before it is immersed in molten zinc to achieve galvanizing?

True or false: With zinc-rich coatings on steel, the zinc becomes the anode in a galvanic cell and sacrifices itself to protect the cathode, the underlying steel.

What is another name for wet storage stain on galvanized metal?

If SSPC-SP 16, “Brush-Off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless Steels, and Non-Ferrous Metals,” is used to prepare architectural aluminum for recoating, what blast pressure should be used?

True or false: Galvanizing is sometimes coated with organic coatings to extend its service life.

True or false: zinc and magnesium can be used as sacrificial metals for the galvanic protection of steel.

What is a duplex coating system?


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