LabCompanion SH Series Salt Spray Test Chamber

Overview

The LabCompanion SH Series Salt Spray Test Chamber is a precision-engineered environmental test system designed to evaluate the corrosion resistance of coated, plated, anodized, and passivated metallic and non-metallic surfaces under standardized accelerated salt fog conditions. Operating on the principle of continuous or cyclic nebulization of a precisely formulated sodium chloride (NaCl) solution—atomized via Bernoulli-effect air-assisted nozzles—the chamber generates a highly reproducible, uniformly distributed saline aerosol within a thermally stabilized PVC-lined test chamber. The system adheres strictly to internationally recognized test protocols including ASTM B117 (Neutral Salt Spray), ISO 9227 (NSS, AASS, CASS), JIS Z2371, and CNS 12214, enabling laboratories to generate auditable, inter-laboratory comparable corrosion data for quality assurance, supplier qualification, and regulatory submissions.

Key Features

• Robust chamber construction using 8 mm thick, UV-stabilized PVC board reinforced with circumferential structural bands—ensuring dimensional stability, chemical inertness, and zero warpage over extended operational life.
• Dual-stage temperature control architecture: independent PID + PWM + SSR regulation for both test chamber (±0.3 °C accuracy) and saturated air tank—critical for maintaining consistent fog generation kinetics and minimizing thermal drift during long-duration tests.
• Optimized雾化 (atomization) system based on Bernoulli’s principle: compressed air draws salt solution through calibrated glass nozzles, producing fine, stable droplets (median diameter <10 µm) with deposition uniformity maintained within ±0.3–0.9 mL / 80 cm²·h across the full test area.
• Integrated safety architecture: dual redundant protection for the test chamber—including EGO thermal cut-off and PT100 sensor feedback—plus low-water-level shutdown, saturated tank over-temperature lockout, and circuit-breaker-protected power distribution.
• Front-access modular drainage system: segregated, gravity-fed discharge paths for solution reservoirs, overflow trays, and condensate collection—minimizing cross-contamination and simplifying maintenance in GLP-compliant workflows.
• Acrylic viewing lid with rapid defogging function: electrostatic-resistant transparent cover enables real-time visual inspection while eliminating post-test condensation via integrated low-power heating elements.
• Flexible water supply interface: supports both automatic solenoid-controlled refill and manual bypass filling—ensuring uninterrupted operation even during municipal water supply interruptions.

Sample Compatibility & Compliance

The SH Series accommodates flat, angular, and three-dimensional test specimens up to 2000 mm × 2700 mm × 1550 mm (SH-200 model), with standardized specimen racks and adjustable angle holders (15° and 30° inclination per ASTM B117). All chamber materials—including PVC interior, SUS#304 saturated air tank, and borosilicate glass nozzles—are chemically resistant to 5 wt% NaCl, acetic acid (CASS), and copper-accelerated chloride solutions. The system supports full traceability in regulated environments: digital temperature logs, spray duration timestamps, and user-accessible calibration records align with FDA 21 CFR Part 11 requirements when paired with optional audit-trail software modules. Validation documentation—including IQ/OQ protocols, uncertainty budgets per ISO/IEC 17025, and as-built drawings—is provided with each unit.

Software & Data Management

While the base controller features intuitive keypad-based digital input and dual-channel LED display (chamber and saturated tank), optional LabCompanion TestSuite™ software enables PC-based remote monitoring, automated report generation (PDF/CSV), and electronic signature capture. Data streams—including real-time temperature profiles, cumulative spray time, and alarm event logs—are timestamped and stored with SHA-256 hashing to satisfy GLP/GMP data integrity mandates. The system supports export of raw datasets compatible with statistical process control (SPC) platforms and integrates seamlessly with LIMS via Modbus RTU or Ethernet/IP protocols.

Applications

• Qualification of automotive exterior trim coatings (e.g., zinc-nickel plating, electrophoretic paint) per ISO 14995 and SAE J2334.
• Validation of aerospace fastener passivation layers (MIL-STD-889, AMS 2700) under CASS conditions.
• Comparative assessment of marine-grade stainless steels (316L, duplex alloys) and polymer-coated aluminum substrates per ASTM G85 Annex A5.
• QC release testing for medical device housings (ISO 10993-15) and implant packaging barrier materials.
• Supplier audit support for electronics enclosures, PCB conformal coatings, and battery terminal plating per IPC-J-STD-002 and IEC 60068-2-11.

FAQ

What international standards does the SH Series fully comply with?
The chamber is engineered and validated to meet the physical and procedural requirements of ASTM B117, ISO 9227 (NSS/AASS/CASS), JIS Z2371, and CNS 12214—including specified temperature uniformity, fog deposition rate, and solution pH control.
Can the SH Series operate continuously for 1,000+ hours without intervention?
Yes—when configured with the optional large-capacity reservoir kit and connected to a stable compressed air supply (4–6 bar, oil-free, ≤5 µm filtration), the system maintains unattended operation for >2,000 hours with scheduled weekly solution replenishment and monthly nozzle inspection.
Is calibration certification included with shipment?
Each unit ships with a factory-issued calibration certificate covering chamber temperature sensors (NIST-traceable PT100), saturated tank thermistors, and timer accuracy—valid for 12 months from date of commissioning.
How is fog uniformity verified during installation qualification?
LabCompanion provides a certified fog collection kit (ASTM D1654-compliant funnels and graduated cylinders) and IQ protocol specifying minimum of 16 collection points across the working volume, with acceptance criteria of ±15% deviation from mean deposition rate.
Does the system support multi-step cyclic corrosion testing (CCT)?
The base controller supports timed sequences of spray/humidity/dry phases; full CCT capability (e.g., VDA 621-415, GMW 14872) requires the optional programmable logic controller (PLC) upgrade module with humidity control add-on.