Amorphous Graphite for Foundry Coatings

Amorphous graphite remains one of the most reliable raw materials for modern foundry coating producers—especially those serving gray iron, ductile iron, and heavy-section casting markets.

Because of its microcrystalline structure, high thermal stability, and fine particle morphology, amorphous graphite delivers strong performance where large volumes of affordable, stable coating solids are required.

1. Why Coating Manufacturers Prefer Amorphous Graphite

1.1 High Thermal Resistance for Iron Castings

In molding temperatures above 1,200°C, amorphous graphite forms a stable, continuous carbon layer.
This helps prevent:

• Metal penetration

• Sand burn-on

• Surface roughness

• Veining defects

1.2 Consistent Suspension & Film Formation

Compared with unprocessed carbon powders, high-purity amorphous graphite provides:

• Stable suspension in water-based and alcohol-based coatings

• Uniform brushing/dipping / flow-coating layers

• Good leveling and blackness

This makes it suitable as a base black additive in universal coatings.

2. Key Technical Parameters for Foundry Coating Formulation

To help coating manufacturers design repeatable products, the following properties matter most:

Qingdao Xinghe Graphite supplies stable FC grades and adjustable mesh sizes tailored to coating plant requirements.

3. Application in Different Coating Processes

3.1 Brushing Coatings

• Requires good leveling

• Amorphous graphite ensures smooth, uniform black films

3.2 Dipping Coatings

• Requires stable viscosity & anti-settling

• Controlled particle-size distribution improves suspension stability

3.3 Flow Coatings 

• Requires fine mesh and fast drainage

• Graphite improves finger flow and reduces streaking

4. Typical Use in Foundry Products

Amorphous graphite is widely used in coatings for:

• Engine blocks/cylinder heads

• Pipe fittings

• Brake drums

• Machine tool castings

• Large gray/ductile iron parts

Its performance is especially valued in large-section castings where burn-on and penetration are more common.

5. Why Coating Producers Choose Qingdao Xinghe Graphite

•  Stable and repeatable quality (mesh 80–300)

• Reliable FC and ash stability

• Bulk supply for high-volume coating lines

• Support for formulation testing & lab samples

• Strong export capability + quick shipping

We understand coating manufacturers require consistency, so our grading and QC processes are designed for batch-to-batch uniformity, ensuring predictable performance in commercial formulations.