A Tale of Two Coatings: Exploring Surface Technologies for Nanocrystalline Cores

 Discover the difference between Electrostatic Powder Spraying and Powder Rolling coatings for nanocrystalline cores. Learn how Dongguan JH Amorphous Co., Ltd. enhances performance, reliability, and winding protection through advanced coating technologies.

In the world of magnetic materials, details matter — especially when it comes to protecting and enhancing high-performance nanocrystalline cores.
At Dongguan JH Amorphous Co., Ltd., we continuously refine our processes to help customers achieve the perfect balance of performance, durability, and cost efficiency.

Recently, our engineering team compared two coating methods widely used in our nanocrystalline core production. Both provide robust protection, but each brings unique advantages depending on your application.

Coating A: Electrostatic Powder Spraying Coating

This traditional technique uses electrostatically charged powder sprayed onto the core surface, followed by high-temperature curing.

Key Features:

• Surface: Slightly uneven with minor texture — functional but not perfectly smooth.

• Edges: Sharper draft angles.

• Cost: More economical, ideal for cost-sensitive projects.

• Wire Compatibility: Suitable for standard wire diameters.

Best suited for: Projects that prioritize cost efficiency and standard magnetic performance.

Coating B: Powder Rolling Coating

A more advanced process, powder rolling ensures a uniform, tightly bonded coating layer with superior surface quality.

Key Features:

• Surface: Exceptionally smooth, providing both visual appeal and functional precision.

• Edges: Rounded R-angles that are gentle on copper wire during winding.

• Cost: Slightly higher, reflecting the enhanced precision.

• Wire Compatibility: Can handle thicker copper wire, allowing more design flexibility.

Best suited for: Applications demanding premium finish, higher wire tolerance, and improved durability.

Why Coating Quality Matters

The coating layer might look simple, but it plays a crucial role in:

• Improving electrical insulation

• Reducing mechanical wear

• Preventing EMI interference

• Extending core lifespan

A well-applied coating ensures smoother winding, fewer production defects, and more reliable magnetic performance in power electronics, EV chargers, and renewable energy converters.

The JH Amorphous Commitment

At JH Amorphous, we believe that perfection lives in the details.
From raw material design to precision coating, every step reflects our dedication to efficiency, consistency, and customer success.

Our R&D team works closely with global partners to deliver customized amorphous and nanocrystalline core solutions, optimized for next-generation energy and industrial applications.

About Dongguan JH Amorphous Co., Ltd.

Dongguan JH Amorphous Co., Ltd. is a professional manufacturer specializing in amorphous and nanocrystalline magnetic cores and parts.
We serve industries including power electronics, renewable energy, automotive electrification, and industrial automation, offering both standard and custom magnet solutions.

Contact Information:
📧 julia@amorphousoem.com
🌐 www.amorphousoem.com

Author:
Julia Yim
International Marketing Manager
Dongguan JH Amorphous Co., Ltd.