Corrosion and Degradation

Question 1

The destructive electrochemical attack of a material

Answer 1

Corrosion

Question 2

Metal atoms characteristically lose or give up electrons in what is called an

Answer 2

Oxidation

Question 3

The site at which oxidation takes place is called the

Answer 3

anode

Question 4

The electrons generated from each metal atom that is oxidized must be
transferred to and become a part of another chemical species in what is termed a

Answer 4

reduction

Question 5

The location at which reduction occurs is called the

Answer 5

cathode

Question 6

Some normally active metals and alloys, under particular environmental conditions, lose their chemical reactivity and become extremely inert.

Answer 6

Passivity

Question 7

Dissimilar metals are physically joined in the presence of an
electrolyte. The more anodic metal
corrodes.

Answer 7

Galvanic Corrosion

Question 8

Oxidation & reduction reactions occur uniformly over surfaces.

Answer 8

Uniform Attack

Question 9

is another form of very localized corrosion attack in which small pits or holes form.

Answer 9

Pitting

Question 10

Combined chemical attack and mechanical wear

Answer 10

Erosion-Corrosion

Question 11

Preferred corrosion of one element/constituent

Answer 11

Selective Leaching

Question 12

Corrosion along grain boundaries,
often where precip. particles form.

Answer 12

Intergranular

Question 13

Narrow and confined spaces.

Answer 13

Crevice

Question 14

Corrosion at crack tips when a tensile stress is present.

Answer 14

Stress corrosion

Question 15

substances added to solution that decrease its reactivity

Answer 15

inhibitors

Question 16

deteriorate by physio-chemical means

Answer 16

Polymers

Question 17

occurs when the polymer is completely soluble

Answer 17

Dissolution

Question 18

the rupture or severance of chemical chain bonds

Answer 18

Bond Rupture or Scission