Why Skipping Demagnetization After MPI Can Be a Costly Mistake

Demagnetization removes or reduces this unwanted magnetic field by randomizing magnetic domains inside the material using a controlled alternating magnetic field (AC). This process:

• ✔️ Ensures clean surfaces for coating, painting, or bonding

• ✔️ Restores neutral magnetic state in precision components

• ✔️ Prevents functional failures in assemblies or instruments

• ✔️ Meets international NDT standards (e.g., ASTM E1444, ISO 9934)

🔧 How to Demagnetize After MPI

The demagnetization method depends on part size, shape, and field strength:

👉 For example, our CDW-12000AT automatic tunnel demagnetizer is widely used after MPI to process up to 50kg components with consistent performance.

📌 Best Practices for Post-MPI Demagnetization

• Use residual field meters (Gauss meters) to verify demag results

• Follow gradual field decay method (move part away from AC field)

• Integrate demagnetizer inline with MPI machines for automation

• Monitor and log residual magnetism levels in your QA checklist

🏭 Real-World Industries That Require Demagnetization After MPI

• Automotive: shafts, crankshafts, bearing rings

• Aerospace: turbine blades, landing gear

• Heavy machinery: gears, forgings

• Marine & rail: structural welds, axles

• Medical devices: surgical tools, implants

🚀 Need a Reliable Demagnetization System?

We specialize in automated demagnetizers designed for integration with MPI and NDT lines. Whether you need a bench unit or a high-power tunnel demagnetizer, we can help optimize your post-inspection workflow.

👉 Explore our demagnetizer systems here:
🔗 https://yourdomain.com/products/demagnetizer

👉 Need help selecting the right model?
📩 Contact us for a free consultation