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Daily Quiz (22)


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: 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.


True or false: Bending and forming of aluminum can be accomplished without harming its anodized finish.


What mechanism of corrosion protection does zinc phosphate provide to coatings?


In a laboratory test of metalized coatings reported recently in JPCL, which metal or alloy provided the best combination of corrosion protection and service life in immersion and intermittent immersion conditions simulating Bureau of Reclamation exposures?


High cross-link density contributes the most to what type of corrosion protection?


ISO 12944 on corrosion protection of steel with protective coatings lists how many environmental exposure classes?


What pigment is made by both a French process and an American process?


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


A recent 5-year inspection of a lining system on a potable water tank bottom that had suffered significant soil-side corrosion in Melbourne, Australia, showed excellent performance from what lining type?


What generic type of topcoat is often claimed to enable a two-coat system rather than a conventional 3-coat system (zinc, epoxy, polyurethane) for corrosion protection of steel?


Pascal Verbiest, in his recent JPCL article, “Developments in Zinc Primers for Corrosion Protection,” describes four mechanisms of corrosion resistance provided by zinc primers.


What are the most commonly used materials for thermal spraying when it is used for corrosion protection?


Platey pigments contribute to what mechanism of corrosion protection?


The IMO’s Performance Standard for Protective Coatings for corrosion protection of cargo tanks in crude oil carriers requires that coatings applied to new tanks must have a useful life of how many years in good condition?


True or false: Thermal spray coatings of aluminum, zinc, and their alloys for corrosion protection of steel are very surface-tolerant.


What type of coating combats corrosion mainly by preventing moisture and oxygen from reaching the steel surface?


What is the most widely used method to prevent corrosion of carbon steel?


What is the most commonly used material for thermal spraying when it is used for corrosion protection?


True or false: Any kind of metal can be used in coatings for sacrificial 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?


Cross-link density, use of platey pigments, and thick films contribute to what mechanism of corrosion protection in a coating?


 
 
   

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