Cathodic Protection Flashcards
Oxidation reactions and reduction reactions are both what sort of reactions themselves?
Redox Reactions
Oxidation is a type of chemical reaction that causes an atom to gain one or more electrons, and Reduction is a type where you lose one or more electrons in an atom. T or F?
False
Oxidation loses one or more
Reduction gains one or more
Four parts of a corrosion cell:
Metallic Connection
Anode
Cathode
Electrolyte
(M.A.C.E)
Define corrosion:
The process of metal deteriorating because of a chemical reaction that occurs in its environment.
Where does corrosion occur in a corrosion cell?
Anode
In a Cathodic Protection System, the cathode is the _____ ________ to be protected.
Metal Structure
Rust is the corrosion of iron. The resulting compound is called:
Iron Oxide
Two common types of C.P.S are:
Sacrifical anode (galvanic)
Impressed Current Systems
What are the three common materials used for Sacrificial Anode Systems?
Aluminum
Zinc
Magnesium
Rectifier stacks are of two general types:
Silicon diodes
Selenium plates
If the liquid level in a storage vessel is constantly changing, how would a rectifier be controlled in a Cathodic Protection System Recitifier Circuit?
Automatically
Can potential-controlled units be used instead of a current-controlled unit in extreme dry-to-wet applications?
Yes.
However, they would require a permanent reference cell.
How is a ammeter and voltmeter connected in a rectifier circuit of a Cathodic Protection Rectifier?
Ammeter - Series
Voltmeter - Parallel
Two methods of rectifier control are:
Manually
Automatic
When it comes to installation, what are the two seperate sections of a Cathodic Protection System?
AC Input section and DC Output section
