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ISO 4623-2 Filiform Corrosion Resistance Test Device

Name: ISO 4623-2 Filiform Corrosion Resistance Test Device
Brand: Xi'an LIB Environmental Simulation Industry

Aluminium Coating Filiform Corrosion Testing Under Controlled Salt Fog Conditions

Unlike conventional salt spray chambers used primarily for general surface corrosion, the ISO 4623-2 Filiform Corrosion Resistance Test Device evaluates underfilm, thread-like filiform corrosion that develops from a scribe or coating defect and propagates beneath paint, varnish, and protective coatings on aluminium substrates.

By combining controlled temperature, high humidity, and uniform salt fog exposure, the chamber provides a reproducible environment for accelerating filiform corrosion development. It helps evaluate corrosion propagation from scribe lines, coating protection performance, and susceptibility to underfilm corrosion. The device is suitable for coated aluminium used in automotive, aerospace, architectural, and industrial applications.

Model: S-150, S-250, S-750, S-010, S-016, S-020 and more custom models

ISO 4623-2, ISO 9227, ASTM B117, ASTM G85 Annex A1, DIN 50021, SAE J2334, IATF 16949

ISO 4623-2 Filiform Corrosion Testing with LIB Test Equipment

Why Choose LIB Industry Filiform Corrosion Resistance Tester?

Purpose-Built for Scribe & Coating Failure Evaluation

Optimized specifically for testing pre-damaged test panels (scribed coatings per ISO 4623-2 / ISO 9227), revealing sub-coating blistering and thread-like filament growth long before visual surface damage appears.

Stable High-Humidity Environment Controls

Filiform corrosion uniquely thrives under high relative humidity (80%–98% RH). Integrated ambient-to-+60℃ temperature management combined with micro-atomization ensures non-condensing, steady moisture conditions.

Continuous & Cyclic Test Versatility

Supports continuous fine-fog spraying as well as automated multi-stage cyclic modes (Salt Spray → High Humidity → Ambient Drying → Dwell), replicating real-world atmospheric alternations.

Anti-Corrosive Seamless FRP Construction

Molded with heavy-duty Fiber Reinforced Plastics (FRP) to ensure high structural integrity, zero chemical interaction with aggressive test media, and 100% leak-proof operations.

Specifications of ISO 4623-2 Filiform Corrosion Resistance Test Device

Model	S-150	S-250	S-750	S-010
Internal dimensions (mm)	590470400	1000640500	1100750500	10001300600
Overall dimensions (mm)	14607601140	18509601350	195010301350	2000×1300×1600
Interior Volume (L)	110	320	410	780
Temp Range & Uniformity	Ambient ～ +60 ℃ (±0.5 ℃ Fluctuation / ±2.0 ℃ Deviation)
Humidity Range	95% ~ 98% RH
Salt Fog Deposition	1～2ml / 80cm2 · h (Critical for Filiform Corrosion Growth)
Spray Type	Continuous / Periodic
Salt Fog Collected	Fog collector and fog measure cylinder
Air Preheating	Saturated air barrel
Spraying System	Atomizer tower and Spray nozzles
Controller	PID controller
Safety Device	Humidifier Dry-combustion Protection; Over-temperature Protection; Over-current Protection; Water Shortage Protection; Earth leakage Protection
Material	Glass fiber reinforced plastics
Standard Configuration	6 round bars and 5 V-shaped grooves

System Highlights of ISO 4623-2 Filiform Corrosion Resistance Test Device

Anti-Leak Chamber Body Constructed from one-piece fiberglass with engineered water-seal grooves, eliminating salt fog escape and preventing thermal loss.
Precision Quartz Atomization System Non-crystallizing quartz nozzles deliver ultra-fine, evenly distributed fog without clogging, maintaining standard deposition rates over prolonged test runs.
Multi-Angle Specimen Rack System Supplied with standard round bars and V-groove supports, allowing sample panels to be positioned at required angles (e.g. 15°–30°) to evaluate coating scribe lines accurately.
Interactive PID Process Controller Allows operators to sequence spray intervals, saturation barrel temperature, dry/wet cycles, and automated fluid level monitoring with comprehensive fault alerts.
Agitated Salt Solution Reservoir Includes continuous solution circulation/mixing to maintain uniform pH, density, and concentration throughout multi-day continuous tests.

FAQ

Is this the same as a standard salt spray chamber?

Not exactly. The equipment uses a salt fog generation system similar to a conventional salt spray chamber, but its application is focused on filiform corrosion evaluation of coated substrates, particularly coated aluminium under ISO 4623-2.

Can the chamber test other coating systems?

Yes. The chamber can be used for coating and corrosion research beyond a single application, provided that the environmental conditions and specimen preparation are appropriate for the selected test method.

Can the sample holder be customized?

Yes. LIB can provide customized fixtures for aluminium profiles, panels, components, and other specimen geometries.

How is filiform corrosion evaluated after testing?

The exposed specimens are examined for corrosion filaments developing from the artificial coating defect. The extent of filiform corrosion can then be evaluated according to the applicable assessment method.

ISO 4628-10:2024 provides a current method for assessing the degree of filiform corrosion, including measurement of filament length.

Does LIB provide after-sales service?

Yes. LIB offers a 3-year warranty, lifetime technical support, and spare parts service, with responsive assistance for troubleshooting, maintenance, and equipment operation.

Learn more about filiform corrosion testing and ISO 4623-2 requirements in our [Filiform Corrosion Testing Guide].

Need a customized testing solution? Contact LIB Industry today.

Send Inquiry

LIB Team will send you specs and quote today.