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Daily Quiz (14)

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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?

Monday, April 21, 2014


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.

Tuesday, February 18, 2014


Cold galvanizing employs a coating with a high percentage by weight of what material?

Tuesday, December 3, 2013


True or False: A seal coat over thermal-sprayed zinc will perform better if application is delayed until at least 30 days have elapsed so that natural oxidation can form on the zinc.

Friday, August 23, 2013


True or False? To be effective, a seal coat over a thermal-sprayed zinc coating must be applied after a significant amount of natural oxidation has occurred.

Monday, June 24, 2013


True or false: Zinc phosphate pigments, when used in primers for steel substrates, provide sacrificial protection of the metal.

Friday, April 5, 2013


What is the main feature of zinc that allows it to provide cathodic protection to steel?

Friday, February 8, 2013


How are the zinc particles in a zinc-rich coating kept in suspension during spray application?

Wednesday, February 6, 2013


True or false: Thermal spraying of zinc is sometimes used for corrosion control on steel substrates.

Thursday, January 31, 2013


Why are zinc-rich coatings sometimes applied to structural concrete?

Tuesday, December 4, 2012


True or false: If a zinc-rich coating has a silicate binder, it is classified as an organic zinc-rich.

Friday, October 19, 2012


In what way is a zinc-rich primer “rich?”

Wednesday, June 6, 2012


True or false: In multi-coat systems, it is not always the case that the higher the zinc loading in a zinc rich primer, the better the system performance will be.

Friday, April 20, 2012


True or false: Inorganic zinc pre-construction primers for shipbuilding normally have more zinc content than inorganic zinc primers applied after fabrication.

Thursday, December 15, 2011


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