Barkhausen noise analysis in practice: Coatings

Barkhausen noise analysis can be done even through non-ferromagnetic coatings. This requires that the coating is thin (<1 mm) and uniform across the sample surface. Coatings always decrease the BN signal from the base material.

A coating makes a gap between the sensor and the analyzed part. That might have a significant effect to the Barkhausen noise amplitude. When measuring through coatings more magnetization power is typically needed.

Barkhausen noise measurementt trough ciatings

The most common application is to measure through Cr-coating. The detection of service-related thermal damages through chromium plate is a straightforward and reliable application for Barkhausen noise. The main application for detecting the surface defects through Cr-coating is landing gears of aircraft. During overhauling of the planes, using Barkhausen noise to detect surface defects through Cr-coating saves at least a week of time per part by preventing the unnecessary chrome stripping of parts such as axles, cylinders, and bores.

We provide Barkhausen noise inspection systems for a wide range of steel components in following automation levels:


Inline/Robot Systems

RoboScan is an automated grinding burn and heat treatment defect detection system that can be integrated into production line.

GearScan 500 and user

Automated systems

Automated systems for quality inspection are tailored for offline use. Easy to use software makes inspections intuitive and systems can adapt to various component types.

CrankScan 200 with user

Semi-automated systems

Semi-automated and manual Barkhausen noise analysis systems are suitable for low volume measurements. The most simple Barkhausen noise measurements can be performed handheld with only a sensor and analyzer.

Barkhausen noise analysis with Rollscan 350 and general purpose sensor.

Manual systems

Manual Barkhausen noise stands are grinding burn and heat treatment defect detection systems for low-volume applications.