HS2440 Week 8 Asyn_Silver and gold Corrosion (copy)

Question 1

Different silver containing compounds

Answer 1

alloying component give hardness and lower cost

Question 2

different components of silver and copper in 4th century bc jewellery finds

Answer 2

Question 3

When would you expect silver oxide to form

Answer 3

Question 4

characteristics of burial corrosion of silver, and layers on the metal surface

Answer 4

Question 5

porbaix diagram of silver in water with chlorides present

Answer 5

Question 6

when silver contains other metals, burial corrosion can occur as I________ corrosion. most common in what kind of material?

Answer 6

mechanically worked and annealed

Question 7

Biodegradation releases what kinds of corrosive compounds

Answer 7

Question 8

features of silver tarnish

Answer 8

darkening and rainbow effects
sterling silver tarnishes much faster than plated silver

Question 9

what is released from touching silver objects that causes corrosion

Answer 9

Question 10

gold, reactivity and properties

Answer 10

only in highly oxidising or alkaline conditions does it form compounds

Question 11

examples of gold alloys

Answer 11

Question 12

gold alloy tarnish experiments

Answer 12

Question 13

gilded material can cause sever g_______ c_______ due to…

Answer 13