3.5 Finishes continued

Question 1

What does a preservative do to a metal

Answer 1

provide medium/long term protection

Question 2

What is good about preservatives

Answer 2

easy to apply with little specialist tooling

Question 3

What is anodising used on

Answer 3

aluminium

Question 4

What are the features of anodising

Answer 4

improving hardness
outer casings like torchest and casings for phones

Question 5

What is the application method like for anodising

Answer 5

electric current passed through electrolyte and anodised product

Question 6

What are the disadvantages for anodising

Answer 6

requires sulphuric acid electrolyte and bath of solution

Question 7

What is electro-plating

Answer 7

providing layer to metal using donor material in electrolyte

Question 8

What are the advantages of electro platinh

Answer 8

low cost metals
hardwearing surface
colour

Question 9

What are the disadvantage of electro plating

Answer 9

requires container with electrolyte
large electric current

Question 10

What is powder coating

Answer 10

protects metal from corrosion improved aesthetics

Question 11

What is powder coating used on

Answer 11

washing machine bodies
dishwasher bodies

Question 12

How is powder coating done

Answer 12

coated product is negatively charged and powder is positively charged so attracted to one another

Question 13

What is the advantage of powder coating

Answer 13

More hardwearing than paint
Provides colour
simple process