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Daily Quiz (13)


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?


 
 
   

Novatek Corporation
Dustless Coatings Removal

Strip it, clean it, and profile it,
all dust free! High production
rates and Blast like finishes.
Comply with new lead
standards.


N.T. Ruddock Co.

Our Abrasives Hold Up Under Pressure

N. T. Ruddock focuses on abrasive selection, equipment evaluation, equipment maintenance & reduction of abrasive consumption. Other services include Screen Analysis & Background Radiation Testing.


SAFE Systems, Inc.
Portable Blast &
Recovery Equipment

Trailer or skid mounted blast and recovery equipment. Systems designed for maximum versatility, environmental compliance
and overall cost savings.
Call 1-800-634-7278


SABRE Autonomous Solutions
Safety, Productivity, Quality. Robotic Blasting

Learn how this simple to use, field deployed, automatic robot is eliminating hazards in major confined, cluttered and complex surface preparation projects.


Detail Masters
Overspray Removal

We offer professional, turnkey service and unparalleled quality!
Our process can save hundreds— even thousands of dollars. It's fast, environmentally safe and 100% guaranteed.


DRYCO
Control the Tank with DRYCO

Temporary climate control equipment. Dehumidifiers,
Heaters, A/C, Power, More…
Call: 866-379-2600


CHLOR*RID International Inc.
Free Webinar

Learn about soluble salts, along with a discussion on allowable levels.
More information at
www.chlor-rid.com,

800-422-3217


AWWA (American Water Works Association)
Register for AWWA’s ACE16 Today!


PPG Protective and Marine Coatings Group
Bringing innovation to the surface.™

PPG Protective & Marine Coatings is widely recognized as a world leader in protective and marine coatings, developing innovative, cutting-edge products and services.


Blastox/The TDJ Group, Inc.
Blastox - One Step
Lead Abatement

Don't waste money on added labor steps with other methods. Don't mix, meter or apply at the job-site. Avoid strict hazardous waste rules.
Let your painters paint

 
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