Coatings And Finishes

Question 1

What can metal finishing do?

Answer 1

1. Reduce surface roughness for seals/joins
2. Descalimg, recurring and cleaning
3. Enhance electrical conductivity
4. Can enhance resistance to electrical and chemical tarnish

Question 2

What are the strengths of zinc plating?

Answer 2

Improves reaistance to corrosion and improved durability. Also improves appearance

Question 3

What is a cheap coating to prevent corrosion?

Answer 3

Water and oil based paints

Question 4

What is powder coating?

Answer 4

UV or heat during a polymer powder. Used to create a Matt or glossy finish

Question 5

What is enemaling?

Answer 5

A thin layer of finely ground glass on metal which is heated to fuse it to the metal

Question 6

What is the purpose of a surface finishing?

Answer 6

1. Preservation and protection - protection against corrosion, fading, oxidizing or decaying.
2. Improve aesthetics - colour, shape, texture, reflectivity, roughness, logos/branding

Question 7

What are the purposes of coatings for natural timbers?

Answer 7

1. Decorative reasons

2. Prevent weathering, UV degradation and moisture (damp)

Question 8

What could effect the suitability of surface treatments for natural timbers?

Answer 8

1. Knots could look attractive with a clear coating but could be uneven with a wood stain
2. Oak is prone to splitting therefore it will need regular coats and maintenance

Question 9

What are some problems when finishing manufactured boards?

Answer 9

They need to be sealed before finishing as they are absorbent.

A veneer will usually be used to finish instead of a coating

Only suitable for indoor use