Homework A

Question 1

proton

Answer 1

positive

Question 2

positive

Answer 2

neutral

Question 3

electron

Answer 3

negative

Question 4

3 requirements for the formation of corrosion in a material

Answer 4

presence of electrolyte

electrical potential difference

conductive path

Question 5

If an atom has more electrons than protons, it is called a ________ion.

Answer 5

negative

Question 6

In an electrochemical reaction, it is the _______which will be eaten away.

Answer 6

anode

Question 7

Aluminum alloy are protected from oxidation by the formation of an
________ film on its surface.

Answer 7

Aluminum Oxide

Question 8

Filiform corrosion usually forms under what paint system?

Answer 8

polyurethane enamel

Question 9

Corrosion is a(n) ________action in which a metal is changed into a
chemical salt.

Answer 9

electrochemical

Question 10

Metallic ion concentration cell corrosion forms in open areas.

Answer 10

Open

Question 11

The basic unit of a chemical element is the atom. It is made up of a nucleus
containing :

Answer 11

protons
neutrons

Question 12

___________is particularly vulnerable to corrosive attack from salt
solutions.

Answer 12

magnesium

Question 13

While both materials will corrode metal, aluminum alloys are more
vulnerable to________.

Answer 13

alkalis