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What are the Differences between Electro Coating and Powder Coating?

February 13, 2017

Several maturing standards dominate the industrial coatings market. Powder coating technology leads the pack, as always, but there's another electrodeposition procedure at our disposal. Known as electro coating or e-coating, this process also adds an impermeable finish to a workpiece, but that's where the similarities end. E-coating is quite different from powder coating. Let's mark out those differences.

What is Electro Coating?

There's no powder spray on this occasion, no spray guns or powder baths. Instead, a liquid-based reservoir is filled with the coating medium, a chemical soup that contains some volatile compounds. The resins and pigments in the chemical bath react with the part as it's dipped, but only when that part is electrically charged. At this point in the process, the fluid is attracted to the workpiece, where it adheres and thickens to create a uniform finish. Primarily, the difference here is the fluid nature of the coating medium. It's liquidized, not manufactured as a dry powder.

Wet Processing Technology

So we've determined electrocoating's wet application characteristics. Are there any other differences? Well, both processing methods cure their electrically attracted finishes by using a baking hot oven, so they have that feature in common. Interestingly, e-coating tech is inherently governable, so a twist of a control can adjust membrane thickness in real-time. Nevertheless, the cross-linked materials used in the dry finish option outstrip this feature by boosting the coating's durability factor. In essence, yes, the electrocoating process increases its toughened lacquer by manipulating finish thickness, but the powder finish option surpasses that product toughening method by using a thinner shell, one that's made of a resilient polymer base.

Applying The Dependability Factor

The finite controllability factor we just linked to the electrocoating solution can also be viewed as a potential drawback. The preprocessing stage is particularly difficult to manage when e-coating tech is being employed. As for the powder coating methodology, preprocess work is essential but a tad more forgiving, in this instance. Finally, the dry finish option uses its time-proven processing profile to add exciting extras to the finished product. This latter feature includes colourful hues and textures, glossy coatings that aren't available in electrocoating.

Objectively speaking, there are still issues to iron out with the e-coating option. The required chemicals aren't environmentally friendly, not in the same way as a dry powder, so special permits may be required to open an electrocoating shop. Finally, and this is perhaps the greatest difference, powder coating solutions offer more finishing choices while always delivering the toughest shell-like coatings.

GP Industries Pty Ltd

Head Office

1 Regal Court,
Vermont South VIC 3133

Phone: (03) 9802 1355

Fax: (03) 9802 6027

Email: gp_ind@bigpond.com


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20 Burgess Road,
Bayswater North VIC 3153

Phone: (03) 9761 7676

Fax: (03) 9761 7671

Email: gpfactory@bigpond.com

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