Tracking

Powder Coating

At a glance

Applicable Materials

Colors

Black (20% or 90% gloss)White (20% or 90% gloss)

Texture

Gloss or semi-gloss

Can be applied with

Media blasting, tumbling (neither is needed)

Color Options

Powder Coating

Powder Coating

About the Process

Powder coating is a process in which a dry powder paint (either a thermoplastic or thermoset polymer) is applied to a metal surface using electrostatic application. Unlike traditional liquid paint, powder coating does not need a solvent to keep the binder and filler of the paint in liquid suspension. This allows for application of thicker coatings without running or sagging, and the coatings are also tougher as a result.

The powder coating process starts off by electrically grounding the part to be painted, which gives it a net negative charge. After grounding, the paint is sprayed at the part using a corona gun, which applies a positive charge to the powder. The polarization of the two components causes the powder to stick to the metal, where it will remain so long as it is undisturbed.

After the powder has reached a specified thickness on the part, it is cured into a polymeric film using elevated temperatures (~200°C), such as with a convection oven. Thermosetting polymers will crosslink during the curing process to improve performance, but thermoplastic varieties simply flow while heated to form the final coating.

Design considerations

  • This process adds substantial thickness to a part’s surface, so plugging and masking threaded/reamed holes or other critical-to-function surfaces is recommended.
  • Powder coating polymers are usually insulative and offer poor electrical conductivity.

YOU MIGHT ALSO BE INTERESTED IN

Product Development Process: Design Phase of a Multi-Tool Phone Stand From Concept to Prototype

Product Concept Development This article will take you through the process of physical product development, starting with the essential step of developing the product concept.  Problem Statement What product would mechanical engineers want to have by their side at all times? That’s what I asked myself as I embarked on this design project.  As with […]

Learn More

What is Nearshoring and Why are Companies Moving Their Manufacturing Closer to Home?

Your manufacturing partner and their location are critical factors to consider when it comes to part production. Many companies that outsource manufacturing or own factories overseas are nearshoring due to several advantages such as reduced lead times, improved communication and cost savings. Nearshore manufacturing is a trending topic in the U.S. due to these benefits […]

Learn More