Corrosion 2

Question 1

a device that can generate electrical
energy from the chemical reactions occurring in it, or use the
electrical energy supplied to it to facilitate chemical reactions in
it. These devices are capable of converting chemical energy into
electrical energy, or vice versa

Answer 1

electrochemical cell

Question 2

defined as the deterioration of materials by chemical processes. Of
these, the most important by far is electrochemical corrosion of metals.

Answer 2

Corrosion

Question 3

can be regarded as a short-circuited electrochemical ce

Answer 3

corrosion system

Question 4

also called “dissimilar metal corrosion” or wrongly
“electrolysis”) refers to corrosion damage induced when
two dissimilar materials are coupled in a corrosive
electrolyte.

Answer 4

galvanic corrosion

Question 5

late 18th century- The
bimetallic driving force was
discovered through as series
of experiments with the
exposed muscles and nerves
of a frog that contracted
when connected to a
bimetallic conductor.

Answer 5

Luigi Galvani

Question 6

1800- the principle was later
put into a practical
application by first electrical
cell, or battery: a series of
metal disks of two kinds,
separated by cardboard
disks soaked with acid or salt
solutions.

Answer 6

Alessandro Volta

Question 7

early 19th century- The
principle was also
engineered into the useful
protection of metallic
structures

Answer 7

Sir Humphry Davy

Question 8

the metal that corrodes preferentially. It loses
electrons and experiences oxidation. LESS NOBLE

Answer 8

Anode

Question 9

metal that is protected from corrosion. It
receives electrons and undergoes reduction. MORE NOBLE

Answer 9

Cathode

Question 10

A conductive solution, like saltwater or even tap
water, that allows the flow of ions between the anode and
cathode.

Answer 10

Electrolyte

Question 11

A metallic pathway connecting the
anode and cathode, allowing the flow of electrons to
complete the circuit

Answer 11

Electrical connection:

Question 12

Choosing compatible metals with minimal
differences in nobility when possible can
significantly reduce the risk.

Answer 12

Material selection

Question 13

Physically isolating the dissimilar metals using
non-conductive materials like plastic or rubber
can prevent electrical contact and halt the
corrosion process.

Answer 13

Electrical isolation

Question 14

Applying protective coatings to the anode can
create a barrier and impede its interaction with the
electrolyte.

Answer 14

Coating

Question 15

ntroducing a more active metal, called a
sacrificial anode, can be strategically placed to
corrode preferentially and protect the desired
metal. This principle is used in cathodic protection
systems for pipelines and other structures

Answer 15

Sacrificial anodes

Question 16

tendency for an electrode to
lose or gain electrons when dipped
in the solution of its ions

Answer 16

Electrode Potential

Question 17

Current is produced in an electrochemical cell
while corrosion is occurring.

Answer 17

Corrosion Current

Question 18

involves the
transfer of electrons from the anode to the
cathode

Answer 18

Electrochemical corrosion

Question 19

Speed at which any given metal deteriorates in a
specific environment.

Answer 19

Corrosion Rate

Question 20

Electrochemical corrosion rate is

Answer 20

instantaneous