HAIDA International HD-E808-90AT Multi-Cycle Corrosion Test Chamber (Salt Spray / Dry / Humid Alternating Environment Chamber)

Overview

The HAIDA International HD-E808-90AT Multi-Cycle Corrosion Test Chamber is an advanced environmental simulation system engineered for accelerated corrosion testing under dynamically alternating conditions—specifically salt spray, dry, and humid environments. Unlike single-mode salt fog chambers (e.g., ASTM B117-compliant NSS units), this chamber implements multi-stage cyclic exposure protocols aligned with ISO 14993, ISO 16151, GB/T 24195, and GJB 150.11A. Its core operational principle relies on precise thermodynamic and aerosol control: compressed air—filtered, pressure-regulated, and saturated in a stainless-steel heated tank—is delivered to precision borosilicate glass nozzles, generating uniform micron-scale NaCl mist via Bernoulli-effect atomization. Simultaneously, independent heating, refrigeration (R404a-based), steam humidification, and forced-air circulation subsystems enable stable, repeatable transitions between defined climate segments—critical for evaluating real-world degradation mechanisms in automotive coatings, aerospace fasteners, marine electronics housings, and EV battery enclosures.

Key Features

• Triple-mode programmable cycling: Salt spray (NSS/AASS/CASS), dry (≤30 %RH), and humid (≥95 %RH or 40 °C/93 %RH) phases—all independently controllable in sequence and duration.
• High-fidelity climate control: PID-regulated temperature resolution of 0.1 °C (±2.0 °C uniformity) and humidity resolution of 0.1 %RH (±3.0 %RH fluctuation; ≤±5.0 %RH deviation below 75 %RH).
• Corrosion-grade construction: Inner/outer chambers fabricated from 8 mm imported PVC board; saturated air tank and critical fluid paths made of SUS304/SUS316 stainless steel; acid-resistant drainage and piping.
• Intelligent touch-panel controller: 5.7″ TFT color LCD with bilingual (English/Chinese) interface, 120-program memory capacity, 1200-segment sequencing, and real-time graphical curve display (temperature vs. time, humidity vs. time).
• Integrated safety architecture: Dual-level overtemperature cutoff, low-water detection, phase-loss protection, ground-fault interrupter, and emergency power-off switch compliant with IEC 61000-4 EMC standards.
• Automated data integrity: Battery-backed RAM (10-year retention), RS-232 PC connectivity, timestamped logging at user-defined intervals (30–180 sec), and audit-ready file export (CSV/Excel).

Sample Compatibility & Compliance

The HD-E808-90AT accommodates test specimens up to 900 × 600 × 600 mm (W×D×H), mounted on dual-tier corrosion-resistant sample racks—V-shaped fiberglass lower supports and adjustable O-ring rods enabling 200°±5° orientation per ISO 9227 Annex A. It excludes hazardous materials (flammables, explosives, radioactives, biologicals, or highly volatile organics) per IEC 61000-4-2 ESD and GJB 150.1A safety directives. The chamber meets full regulatory alignment with: ASTM B117 (neutral salt spray), ASTM B368 (copper-accelerated acetic acid salt spray), ISO 9227, ISO 14993 (cyclic salt/dry/wet), ISO 16151 (acidic cyclic), GB/T 10125, GB/T 24195, GB/T 20854, DO-160 Sections E/F/G, and MIL-STD-810H Method 509.5. All hardware and software functions support GLP/GMP traceability requirements—including electronic signature-capable administrator access control, parameter lockout during test execution, and immutable audit trails per FDA 21 CFR Part 11 Annex 11 guidelines.

Software & Data Management

The embedded control software provides full lifecycle test management—from setup to post-processing. Users define multi-step cycles (e.g., 2 h salt spray @ 35 °C → 4 h dry @ 60 °C/≤30 %RH → 16 h humid @ 40 °C/93 %RH) with loop counts up to 999. Real-time monitoring includes live sensor values, active phase status, and predictive fault diagnostics (e.g., “Saturated Tank Low Water” with corrective action prompt). Data capture includes calibrated PT100 and capacitive RH sensor outputs, logged with millisecond timestamps. Post-test analysis tools support cross-file comparison, X/Y-axis replotting, statistical summary (min/max/avg/stdev), and export to third-party platforms (MATLAB, JMP, Minitab). Administrator privileges enforce role-based permissions: operator-level users may execute preloaded programs but cannot modify calibration offsets or security settings—ensuring compliance with ISO/IEC 17025 Clause 7.7 and CNAS-CL01:2018 requirements.

Applications

This chamber serves R&D laboratories, QC departments, and certification bodies validating material durability across regulated industries. Typical use cases include: (1) Automotive—evaluating galvanized steel chassis components under simulated coastal road-salt exposure; (2) Aerospace—testing aluminum alloy fasteners per DO-160G Section 16 for avionics enclosures; (3) Energy—assessing lithium-ion battery pack housings (GB/T 31467.3) against chloride-induced pitting and crevice corrosion; (4) Electronics—verifying conformal coating integrity on PCBAs subjected to mixed-flow gas + humidity stress; (5) Medical devices—confirming stainless-steel surgical instrument passivation stability under cyclic saline immersion per ISO 13485 Annex C. Its ability to replicate synergistic degradation—where salt deposition accelerates electrochemical attack during subsequent wet/dry transitions—makes it indispensable for failure mode analysis beyond static NSS testing.

FAQ

What standards does the HD-E808-90AT fully support?
It complies with ASTM B117, ASTM B368, ISO 9227, ISO 14993, ISO 16151, GB/T 10125, GB/T 24195, DO-160E/F/G, GJB 150.11A, and MIL-STD-810H Method 509.5.
Can the chamber operate standalone without PC connection?
Yes—the integrated touchscreen controller enables complete test definition, execution, and data review offline. RS-232 is optional for archival or remote supervision.
What maintenance intervals are recommended for optimal performance?
Daily: Clean nozzles and inspect spray collectors; Weekly: Verify saturation tank water level and pH of salt solution; Quarterly: Calibrate PT100 sensors and RH probes per GB/T 5170.8; Annually: Replace desiccant in air dryer and inspect refrigerant charge.
Is the system compatible with 21 CFR Part 11 requirements?
Yes—administrator authentication, electronic signatures, audit trail generation, and parameter lockout during active tests fulfill core Part 11 criteria for electronic records and signatures.
What compressed air specifications are required?
Oil-free, dried air at 0.4–0.8 MPa supply pressure; flow rate ≥4 m³/h; dew point ≤−40 °C; particulate filtration ≤0.01 µm.