Powder Coating Interview Questions

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The Powder coating is one of the special process in manufacturing industry. So before deploy of any engineer, he must have to face the interview. Therefore here we are going to the Powder Coating Interview Questions summary from our post on powder coating process.

As this one is the special process. Therefore the requirement of the powder coating process is very stringent to customer.

Also there are some CSR (Customer specific requirements) from many OEM’s (Original equipment manufacturer).

So, you can learn all details of powder coating process from my post by click here.

Process knowledge is the key while going to the interview for particular process requirements and functions.

Therefore my request is, please learn all the basics of your current job profile and try to get keen knowledge from your roles and responsibilities.

Lets dive into the interview questions.

which interviewer should ask in an interview.

Powder Coating Interview Questions

Question: What are surface treatment processes?

Answer: 1. Plating, 2. CED Coating, 3. Powder Coating, 4. Buffing/Mirror finishing. 5. Shot blasting, 6. Painting, 7. Surface Hardening

Question: Why surface treatment or powder coating done?

Answer: The general answer should be – The purpose is to cover and alter the surface. Therefore coating done To improve aesthetics, To improve corrosion resistance, To control friction & wear, To change physical properties, To improve the hardness.

Question: What is powder coating?

Answer: We know that it is surface treatment process, therefore Powder coating is an advanced method of applying a decorative & protective finish to a wide range of materials & products that are used by both industries & consumers.

Question: What types of powder use in powder coating process?

Answer: Basically the powder is mixture of finely ground particles of pigment & resin. Therefore Pigment, extender, resins and additives used in powder coating mixture.

Question: What are the chemicals use in bath preparation?


  • Degreasing chemicals
  • Acid cleaning
  • Activation
  • Zinc phosphating
  • Passivation
  • Powder

Common question in many interviews such as application and defects.

Question: Can you please tell me, what are the application of powder coating?

Answer: You should know the application of respective process while going to the interview.

Basically powder coating applies in n number of industries and product ranges such as

  • Domestic appliances
  • House hold appliances
  • Industrial application
  • Automotive application
  • Marine environments

Applications on different substrates

  • All ferrous sheet metal & casting substrates
  • Different grades of steel & cast iron derivatives
  • Non ferrous sheet metal as well as casting
  • Aluminum, copper, brass,…etc & casting

Question: What are the defects generated in powder coating process?

Answer: Basically in every interview you will ask for this question. And while going to interview you should know the defects generated in respective process.

Therefore the possible defect generated in the powder coating process is,

  • Paint peel off
  • Pin hole
  • Blisters
  • Uncovered
  • Bubbles
  • Touch up
  • Scratches
  • Craters
  • Dust