Powder Coating Interview Questions

Powder coating is one of the special processes in the manufacturing industry. So before deploying 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 the powder coating process.

As this one is a special process. Therefore the requirement of the powder coating process is very stringent for customers.

Also, there are some CSR (Customer specific requirements) from many OEMs (Original equipment manufacturers).

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 of your roles and responsibilities.

Let’s dive into the interview questions. that the interviewer should ask in an interview.

powder cating interview question

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 is surface treatment or powder coating done?

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

Question: What is powder coating?

Answer: We know that it is a 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 are used in the powder coating process?

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

Question: What are the chemicals used in bath preparation?


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

A common question in many interviews such as application and defects.

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

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

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

  • Domestic appliances
  • Household 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 the powder coating process?

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

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

  • Paint peels off
  • Pinhole
  • Blisters
  • Uncovered
  • Bubbles
  • Touch up
  • Scratches
  • Craters
  • Dust
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