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Daily Quiz (34)

True or False: Scientists have developed a low-cost iron aluminide coating that show four times increased corrosion resistance than that of mild steel.

Metalizing, or thermal spray was first introduced in the early 1900s by this Swiss inventor:

The U.S. Department of Energy awarded computational materials design specialist QuesTek Innovations LLC (Evanston, Illinois) $1.1 million in Small Business Innovation Research Phase II funding for research in:

True or false: SSPC: The Society for Protective Coatings offers a jointly issued standard on thermal spraying with the American Association of State Highway Transportation Officials and the National Steel Bridge Alliance.

True or false: Thermal spraying is a group of processes where the thermal spray feedstock (aluminum, zinc or a combination of alloys developed in the form of a wire or powder) is heated, atomized and propelled by a conveying gas stream and deposited to form a thermal spray metallic coating (TSC) on the cleaned steel.

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: White scabbing is the term used to describe the accelerated oxidation of galvanized steel caused by exposure to relatively high concentrations of moisture and oxygen trapped between pieces or sheets of steel that are closely stacked.

True or false: Magnetic induction is the principle of operation of gages used to measure the thickness of thermal spray aluminum when the base material is carbon steel only.

True or false: The service life of a duplex system consisting of galvanizing and paint has been reported in some studies to be a factor of 2.3 to 4 times the sum of the individual service lives for galvanizing and painting, depending on the exposure environment.

True or false: Duplex galvanizing is the name of the alloy coating comprised of tin and zinc, which is sometimes used to coat stainless steel.

True or false: Coatings with zinc phosphate pigments provide galvanic protection to steel.

True or false: Either galvanic or impressed current is used to create cathodic protection of steel.

What three organizations have a joint specification for the application of thermal spray coatings?

True or false: Flame spraying, metallizing and plasma spraying are all forms of thermal spraying.

True or false: Duplex galvanizing is an alloy coating comprised of tin and zinc sometimes used to coat stainless steel.

True or false: A seal coat should not be applied over a thermal-sprayed zinc coating until oxidation occurs on the surface.

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

SSPC recently created a specification for application of thermal spray coatings together with AASHTO and what other organization?

True or false: According to a recent JPCL article, freshly applied thermal spray aluminum is close in appearance to steel newly blasted to white metal.

True or false: Thermal spray aluminum has a silicate binder.

True or false: Organic zinc-rich coatings are solvent-borne; inorganic zinc-rich coatings are water-borne.

True or false: In hot-dip galvanizing, the coating forms four distinct layers.

True or false: Bimetallic corrosion, such as that which results when two dissimilar metals are connected electrically in a water tank interior, occurs most rapidly when the two metals are close together rather than far apart in the galvanic series.

True or false: Like hot-dip galvanizing, thermal-spray zinc coatings produce an iron-zinc alloy at or near the surface of the steel substrate being coated, according to a recent JPCL article.

True or false: The application of a coating to stainless steel that is electrically connected to carbon steel in immersion service can reduce but cannot completely eliminate the effects of galvanic corrosion, according to a recent JPCL article.

How is film build normally achieved during the thermal spray process?

What is a term used to describe the accelerated oxidation of galvanized steel caused by exposure to relatively high concentrations of moisture and oxygen trapped between pieces or sheets of steel that are closely stacked?

True or false: According to a recent JPCL article, a thermal-spray metal protective film is more similar to hot-dip galvanizing than to a liquid-applied coating.

True or false: Arc-spray application of thermal-sprayed metal coatings is conducted only in the shop.

True or false: Organic zinc-rich coatings are not recommended for the repair of galvanizing.

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.

True or false: A seal coat should be applied over a thermal-sprayed zinc coating before oxidation occurs on the surface.

True or False: Both zinc and aluminum are used as thermal spray materials for corrosion protection of steel.

Who publishes the Specification for the Application of Thermal Spray Coatings (Metallizing) of Aluminum, Zinc, and their Alloys and Composites for the Corrosion Protection of Steel?
 
 
   

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