Zhulan ZLHS-60-WSH Composite Salt Spray Test Chamber

Overview

The Zhulan ZLHS-60-WSH Composite Salt Spray Test Chamber is an engineered environmental simulation system designed for accelerated corrosion testing under controlled saline, humid, and thermal conditions. It operates on the principle of standardized salt fog generation via pressurized tower-type nozzles, enabling reproducible deposition of sodium chloride (NaCl) aerosol in accordance with internationally recognized test protocols—including neutral salt spray (NSS), acetic acid salt spray (AASS), and copper-accelerated acetic acid salt spray (CASS). As a core component of tri-environmental (humidity, salt mist, and mildew) reliability assessment, this chamber supports qualification testing for metallic coatings, electroplated finishes, automotive components, marine hardware, electronic enclosures, and aerospace fasteners. Its construction adheres to the physical and chemical stability requirements defined in GB/T 2423.17–2008, which is technically equivalent to IEC 60068-2-11, ASTM B117, DIN 50021, and MIL-STD-810G Method 509.4.

Key Features

• Corrosion-resistant chamber body and lid fabricated from imported high-purity polypropylene (PP)板材 — offering exceptional resistance to HCl, NaCl, and acidic mists at elevated temperatures up to 60°C
• Tower-type spray system with non-crystallizing nozzles and integrated salt solution filtration — ensures uniform fog distribution and eliminates nozzle clogging during extended operation
• Water-sealed lid-to-chamber interface — prevents salt fog leakage and maintains consistent chamber integrity throughout test cycles
• Intelligent PID temperature controller with ±0.1°C setpoint accuracy and ±0.5°C temperature fluctuation — supported by platinum RTD (PT100) sensing and independent nickel-chromium heating elements
• Dual-mode spray control: selectable continuous or programmable intermittent spraying with timer resolution down to 1 second (range: 1 s to 9999 h)
• Comprehensive safety architecture including overtemperature cutoff, dry-run protection, circuit breakers, and dual mechanical/electronic heater safeguards
• Front-access service panel with lockable side door — facilitates routine inspection, calibration, and maintenance without compromising structural sealing

Sample Compatibility & Compliance

The ZLHS-60-WSH accommodates standard test specimens up to 600 mm (W) × 400 mm (H) × 450 mm (D), with configurable V-shaped and cylindrical sample racks included as standard. It supports both flat-panel and three-dimensional parts, provided they do not obstruct airflow or impede fog collection. The chamber meets regulatory expectations for GLP-compliant corrosion testing when operated within documented SOPs; data traceability can be enhanced via optional analog/digital output interfaces compatible with external logging systems. While not inherently 21 CFR Part 11 compliant, its microprocessor-based controller allows integration into validated laboratory networks where audit trails and user access controls are externally managed. All materials in contact with salt solution—including tubing, nozzles, and reservoirs—are chemically inert PP, PVC, or passivated stainless steel, eliminating cross-contamination risks.

Software & Data Management

The chamber utilizes a programmable LCD controller with bilingual (English/Chinese) interface, supporting multi-segment time-temperature-spray profiles. Though the base unit does not include PC connectivity or cloud-based reporting, it provides analog voltage outputs (0–10 V) and relay status signals for integration into centralized facility monitoring platforms. Optional RS485 Modbus RTU communication enables remote parameter readout and basic alarm notification. All operational logs—including start/stop timestamps, setpoint deviations, and fault codes—are retained in non-volatile memory for post-test review. For regulated environments requiring electronic records, third-party SCADA or LIMS adapters may be deployed to capture real-time chamber telemetry alongside test specimen metadata.

Applications

• Qualification of zinc, nickel, chromium, and tin plating on ferrous and non-ferrous substrates per ISO 4520 and ASTM B633
• Corrosion resistance validation of automotive trim, brake calipers, and under-hood electronics per SAE J2334 and GMW14872
• Accelerated aging of printed circuit board conformal coatings and solder mask integrity per IPC-TM-650 2.6.17
• Performance benchmarking of marine-grade stainless steels (e.g., AISI 316) and aluminum alloys (e.g., 6061-T6) in coastal exposure simulations
• Supplier auditing and incoming QC screening for electrochemical passivation quality on medical device housings
• Supporting R&D of corrosion-inhibiting additives in industrial lubricants and protective coatings

FAQ

What standards does the ZLHS-60-WSH comply with?
It conforms to GB/T 2423.17–2008, and is functionally aligned with ASTM B117, IEC 60068-2-11, DIN 50021, and MIL-STD-810G Method 509.4.
Can the chamber perform humidity-only or combined humidity–salt spray tests?
The base model is configured for salt spray only; however, it can be factory-modified to integrate humidity control (85–95% RH) for cyclic corrosion testing (CCT) upon request.
Is salt solution preheating available?
Yes—integrated salt solution preheating ensures thermal equilibrium between the brine and chamber air, preventing localized condensation and maintaining stable test temperature.
What maintenance intervals are recommended?
Daily visual inspection of nozzles and filters; weekly cleaning of the salt reservoir and collection funnels; quarterly verification of temperature sensor calibration and seal integrity.
Does the unit support automated data export?
Not natively—but analog outputs and optional RS485 enable integration with external DAQ systems for time-stamped parameter logging and compliance reporting.