Metals Corrosion and Mg based Corrosion Study Guide

Question 1

Define corrosion of metals

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Question 2

Zn –> Zn^2+ + 2e- is an example of oxidation/reduction reaction (Underline/circle correct answer)

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Question 3

State the factors that could affect the corrosion rate of metals

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Question 4

State and describe (with equations) two basic reactions associated with corrosion

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Question 5

Draw and describe a galvanic cell.

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Question 6

Define cell potential as it relates to a galvanic cell

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Question 7

What information does the galvanic series in seawater give us.

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Question 8

What is the EMF test

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Question 9

State and describe three forms of corrosion

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Question 10

Describe intergranular corrosion

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Question 11

Describe selective leaching corrosion and give an example related to its occurrence in an implantable device to illustrate this type of corrosion

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Question 12

Give an example of where and why would galvanic corrosion occur in biomedical devices

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Question 13

Describe two general strategies for corrosion control

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Question 14

Describe three general design rules that are important to the reduction/prevention of corrosion

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Question 15

Give two examples of alteration of environment to prevent/reduce corrosion

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Question 16

What is the main cause of H2 evolution during magnesium degradation?

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Question 17

Why are electrochemical techniques used for corrosion measurement evaluation?

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Question 18

What is the difference between polarized and un-polarized experiments and name two corrosion experiments that is un-polarized and polarized respectively?

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Question 19

Name three advantages of electrochemical technique used for corrosion testing.

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Question 20

Name two mediums that could be used for Mg in-vitro corrosion testing?

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Question 21

Describe mass loss measurement for determining corrosion rates for Mg based materials?

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Question 22

Describe Hydrogen Evolution Measurement for determining corrosion rates for Mg based materials?

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Question 23

What are the three electrodes in the controlled potential experiment? Describe them.

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Question 24

What is the purpose of the Tafel plot?

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Question 25

Sketch a tafel plot and point out he anodic branch, cathodic branch, and label the graph appropriately.

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Question 26

Why are electrochemical corrosion testing methods preferred over mass loss methods?

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Question 27

What are the two types of in-vitro corrosion testing and how are both interrelated?

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Question 28

Why are alectrochemical techniques used for corrosion measurement?

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Question 29

Define open circuit potential as it related to electrochemical corrosion testing.

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