Daily Quiz (13)


In what state was a $2.5 million fine levied upon a gas utility for failing to provide timely repairs to deficient cathodic protection systems?


True or false: A metallized substrate provides cathodic protection and develops an oxide film that adds barrier protection of the underlying steel.


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


What coating component controls corrosion by modifying anode and/or cathode reactions on steel substrates, driving the steel potential into its passive region?


True or false: Inhibitive pigments provide cathodic protection to steel.


True or false: Zinc dust is the only sacrificial pigment commonly used in anti-corrosive coatings.


True or false: Cathodic protection of steel pipe is sometimes achieved with anodizing.


True or False: Impressed current and sacrificial anodes are two types of cathodic protection systems.


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


What coating failure is likely to occur when excessive voltage is used for cathodic protection of a coated steel structure?


Which of these organizations provides standards and technical information about the use of cathodic protection for corrosion control?


True or false: Coatings are normally used in conjunction with cathodic protection of steel to reduces the amount of current required to protect the steel.


 
 
   

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