Chapter 17 corrosion and degradation of materials

Question 1

corrosion

Answer 1

corrosion the process of corroding metal, stone, or other materials.

Question 2

Electrochemical corrosion

Answer 2

Electrochemical corrosion occurs when two dissimilar metals are present in an electrolytic medium.

Question 3

standard hydrogen electrode

Two outcomes

Corrosion Electrodeposition

Answer 3

Question 4

standard emf series

Answer 4

Question 5

effect of solution concentration and temperature

Answer 5

Question 6

galvanic series

Ranking of the reactivity of metals/alloys in seawater

Answer 6

Question 7

forms of corrosion

Stress corrosion

Uniform Attack

Erosion-corrosion

Selective Leaching

Intergranular

Pitting

galvanic

crevice

Answer 7

Question 8

corrosion prevention part 1

Materials Selection -

Lower the -

Apply physical -

Answer 8

Question 9

corrosion prevention part 2

Add inhibitors (substances added to a solution that decrease its reactivity)

Cathodic (or sacrificial) protection

Answer 9

Question 10

summary

Metallic corrosion involves electrochemical reactions ________

Metals and alloys are ranked according to their __________

Temperature and solution composition affect ___________

Forms of corrosion are classified according to ___________

Corrosion may be prevented or controlled by _____________

Answer 10