A. The corrosion of a metal immersed in acid requires the presence of oxygen. B.
ID: 1858627 • Letter: A
Question
A.
The corrosion of a metal immersed in acid requires the presence of oxygen.
B.
Cathodic protection involves attaching a more cathodic material to a metal that you want to protect from corrosion.
C.
If two pieces of clean, unpainted 1040 steel sheet are immersed near to each other (but not touching) in seawater, they will corrode at the same rate.
D.
In metals, corrosion always involves the transfer of electrons.
E.
If two different metals are in contrast with each other while immersed in an aqueous environment, the metal with the smaller standard electrode potential will corrode.
Explanation / Answer
A)
The presence of oxygen is also essential for corrosion to take place in ordinary
The presence of oxygen is also essential for corrosion to take place in ordinary water. Oxygen alone will cause considerable corrosion in acid, neutral, or slightly alkaline water. In natural waters, the rate of corrosion is almost directly proportional to oxygen concentration, if other factors do not change. Oxygen also accelerates the corrosion of iron in non-oxidizing acid solutions of moderate strength.
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