3.1.5 - Metal Finishing

Question 1

Explain the powder coating process.

Answer 1

1. The product to be coated is initially negatively charged.
2. The thermoset polymer resin which is positively charged is sprayed through an airgun.
3. The use of charge results in a strong attraction between the powder and the product.
4. The product is then baked in the oven to give it an even coating.

Question 2

What is one advantage of powder coating?

Answer 2

It is much more hardwearing compared to painting.

Question 3

What products is powder coating commonly used on?

Answer 3

Washing machines, fridges and metal gates, fencing and railings.