Corrosion Control

Question 1

capacity of water to neutralize acids

-caused by carbonate, bicarbonate, hydroxide, borate, silicate and phosphate

Answer 1

alkalinity

Question 2

positive pole or electrode of an electrolytic system, such as a battery (attracts anions)

Answer 2

anode

Question 3

negative pole or electrode of an electrolytic cell or system (attracts cations)

Answer 3

cathode

Question 4

electrical system for the prevention of rust, corrosion and pitting of metal surfaces which are in contact with water or soil

Answer 4

cathodic protection

Question 5

the gradual decomposition or destruction of a material by chemical action, often due to an electrochemical reaction

Answer 5

corrosion

Question 6

a form of localized corrosion caused by the electrical connection of two dissimilar metals

Answer 6

galvanic corrosion

Question 7

characteristic of water caused mainly by the salts of calcium and magnesium

Answer 7

hardness

Question 8

an index reflecting the equilibrium pH of a water with respect to calcium and alkalinity

Answer 8

langelier index

Question 9

the addition of oxygen, removal of hydrogen, or removal of electrons from a compound or element

Answer 9

oxidation

Question 10

addition of hydrogen, removal of oxygen or the addition of electrons to an element or compound

Answer 10

reduction

Question 11

an easily corroded material, deliberately installed in a pipe or tank

Answer 11

sacrificial anode

Question 12

corrosion activity resulting from stray electrical current originating from some source outside the plumbing system, such as electric rail systems

Answer 12

stray current corrosion