p1- metal finishing

Question 1

cellulose and acrylic paint

Answer 1

.used on low-cost materials

.applied by brush or spray

. provides colour + textured finish

. corrosion resistant

Question 2

electroplating

Answer 2

.includes: silver, gold, zinc, copper etc

. placed in container wit electrolyte solution

.protective layer, ,ore hardwearing finish

Question 3

polymer dip coating

Answer 3

.metal is heated

. then dipped into a tank of polymer powder

. which has air blowing through it to provide a even coating

eg: kitchen dish drainers, coat hooks

Question 4

metal dip coating

Answer 4

. dipping product in a tank of moten plating metal

. metal must be clean and degreased

. corrosion resistance

eg: tin plating - non corrosive coating to food cans
.zinc plating- beams,gates

Question 5

powder coating

Answer 5

. Thermoset polymer resin is sprayed after
coated

. negative+ positive charge makes it strong

.protection from corrosion and aesthetic

. used on washing machines

Question 6

metal varnishing

Answer 6

.metal is polished to shine

. varnish is applied by brush

. protects metal and allows colour

Question 7

sealants

Answer 7

.applied with cloth or machine pad

. cure for 15 mins

.buffed with cloth to shine

. protect polished surface from decay and tarnishing

Question 8

Anodising

Answer 8

.electric current passes through sulphuric acid

. finished with a clear lacquer or varnish on surface

.provides colour

Question 8

preservatives

Answer 8

.wiping with cloth, spray

. provides a smooth surface

. used on moulds + dies for preventing fingerprints on surfaces