Q-LAB Q-FOG CRH 600 Salt Spray Test Chamber
| Brand | Q-LAB |
|---|---|
| Origin | USA |
| Model | CRH 600 |
| Salt Spray Deposition Rate | 0.5–3.0 mL/(h·80 cm²) |
| Temperature Range | Ambient to 70 °C |
| Chamber Capacity | 640 L |
| Humidity Control | Yes (via Air Preconditioner + Fogging Humidification) |
| Compliance | GMW 14872, SAE J2334, ISO 9227, VW 20108, Ford CETP, Renault D17 2020, Volvo STD 5110, GB/T 10125 |
Overview
The Q-LAB Q-FOG CRH 600 is a fully programmable, high-fidelity environmental test chamber engineered for advanced corrosion testing under controlled salt spray, cyclic humidity, and temperature conditions. Unlike conventional salt fog chambers limited to static or intermittent salt exposure, the CRH 600 integrates a patented air preconditioning system that enables precise, dynamic control of relative humidity (RH) — from 10% to 95% RH — across a temperature range of ambient to 70 °C. This capability supports full compliance with modern automotive and industrial corrosion standards requiring multi-phase cycling, including wet/dry transitions, condensation periods, and controlled salt deposition. The chamber operates on the principle of compressed-air atomization (via twin-nozzle spray towers), combined with optional direct-spray shower functionality for high-velocity, non-aerosolized solution delivery — critical for replicating real-world splash and runoff corrosion mechanisms.
Key Features
- Integrated air preconditioning module enabling stable, repeatable RH control without external humidifiers or steam generators
- Dual-mode corrosion delivery: programmable salt fog (aerosolized mist, 0.5–3.0 mL/(h·80 cm²)) and calibrated shower spray (adjustable flow rate, on/off timing, larger droplet size)
- 640 L working volume with optimized airflow distribution and corrosion-resistant internal construction (PP-H, PVDF-coated steel)
- Intelligent nozzle management system with automatic self-cleaning cycles to prevent clogging during extended Prohesion™ or CCT-type cycles
- Independent temperature and humidity control loops with PID-regulated heaters, cooling coils, and deionized water-fed fogging nozzles
- Comprehensive safety interlocks: low-water cutoff, overtemperature protection, cabinet door open detection, and corrosion-resistant electrical enclosures
Sample Compatibility & Compliance
The CRH 600 accommodates standard test panels (up to 102 mm × 304 mm) mounted at 15° tilt using optional SSP-1100 test panel racks (F-9011-K), as well as irregular 3D components suspended from 20 mm diameter stainless steel rods (F-9017-K). Its chamber geometry and airflow design meet ISO 9227’s requirements for uniform salt deposition across the test surface area. The system is validated for conformance to ASTM B117 (standard salt spray), ASTM G85 Annex A5 (Prohesion™), and complex multi-stage protocols such as GMW 14872 (cyclic corrosion testing with humidity ramping), SAE J2334 (automotive component evaluation), and VW 20108 (multi-cycle climate corrosion). All operational parameters — temperature, RH, spray duration, and dwell time — are traceable and auditable per GLP/GMP requirements, with optional 21 CFR Part 11-compliant software upgrades available.
Software & Data Management
Control and monitoring are performed via Q-LAB’s proprietary CRH Touch Interface — a 7-inch capacitive touchscreen running embedded Linux with real-time logging of all process variables at user-defined intervals (minimum 1-second resolution). Data is stored locally on an industrial-grade SD card and exportable in CSV or XML format. Optional Q-FOG Connect software enables remote supervision, alarm notification (email/SMS), and integration into enterprise LIMS or MES platforms via Modbus TCP or OPC UA. Audit trails record operator logins, parameter changes, cycle starts/stops, and calibration events — satisfying FDA 21 CFR Part 11 requirements when configured with electronic signatures and role-based access control.
Applications
- Automotive OEM and Tier-1 supplier validation of coatings, fasteners, brake components, and under-hood assemblies
- Electroplated and galvanized metal qualification per ISO 4042, ASTM B633, and EN 12329
- Corrosion resistance benchmarking of aerospace alloys (e.g., AA2024-T3, Ti-6Al-4V) under ASTM D1654 and MIL-STD-810H Method 509.6
- Accelerated aging of marine hardware, offshore instrumentation housings, and coastal infrastructure materials
- Quality assurance of consumer electronics enclosures, medical device housings, and battery pack casings exposed to saline environments
FAQ
What deionized water specifications are required for RH control?
Minimum resistivity of 1 MΩ·cm (≤1 µS/cm conductivity); feed pressure 2–4 bar; continuous supply recommended for extended high-RH cycles.
Can the CRH 600 perform ASTM B117 testing without humidity control?
Yes — the chamber defaults to standard salt fog mode with independent temperature and spray regulation, fully compliant with ASTM B117 when configured per Clause 7.2.
Is the shower function compatible with all test solutions?
The shower system is validated for NaCl, CuCl₂-accelerated, and synthetic seawater formulations; use of acidic or high-pH solutions requires verification of nozzle material compatibility (PVDF standard).
How is temperature uniformity verified inside the chamber?
Per ISO 9227 Annex B, Q-LAB provides a factory-installed 9-point thermocouple mapping report; users may conduct periodic verification using calibrated Class I thermocouples per IEC 60584-1.
Does the CRH 600 support automated test sequence import/export?
Yes — Q-FOG Connect supports .qcs (Q-LAB Cycle Script) file import/export, enabling cross-chamber method transfer and version-controlled protocol management.
