DR-H304-200 1200 L Programmable Salt Spray Chamber
A wide 2000 mm test workspace for continuous or periodic salt-fog exposure of large panels, coated assemblies, fasteners and production batches. The DR-H304-200 supports NSS/AASS and CASS operating conditions when configured and operated according to the applicable test method.
2000 × 1000 × 600 mm workspace
Approx. 1200 L
Continuous / periodic spray
Designed for Large Specimens and Batch Corrosion Tests
The “200-Type” identifies the 2000 mm internal width—not a 200 L benchtop unit. Its broad test space accommodates long coating panels, multiple racks of components and larger fabricated parts while preserving clearance for fog circulation and collection.
Large Working Area
A 2000 × 1000 × 600 mm chamber provides room for production batches and long specimens that do not fit conventional 90- or 160-type cabinets.
Programmable Spray Timing
Run continuous fog or timed spray/stop periods according to the selected laboratory procedure and product specification.
NSS, AASS and CASS Conditions
Published temperature and pH settings support neutral, acetic-acid and copper-accelerated acetic-acid salt-spray methods when the required solution and configuration are used.
Cyclic terminology: periodic spray/stop control is not automatically the same as a full cyclic corrosion test (CCT). A sequence such as salt fog, controlled humidity, dry-off and ambient dwell requires dedicated humidity, air-drying and transition hardware. Confirm those modules before claiming compliance with an automotive CCT specification.
DR-H304-200 Technical Specifications
| Model | DR-H304-200 |
|---|---|
| Internal size (W × D × H) | 2000 × 1000 × 600 mm |
| External size (W × D × H) | 2700 × 1250 × 1500 mm |
| Nominal test volume | Approximately 1200 L |
| Chamber material | 8 mm rigid PVC plate |
| Sample support | 10 mm glass-fiber rods with corrosion-resistant V supports; intended specimen inclination 15°–30° where required by the procedure |
| Chamber temperature range | Ambient to +55°C |
| Temperature fluctuation | ≤ ±0.5°C (published value; confirm test and sensor conditions) |
| Temperature uniformity | ≤ ±2°C (published value; confirm test and sensor conditions) |
| Temperature indication accuracy | ±1°C |
| Spray modes | Continuous and periodic spray |
| NSS / AASS chamber setting | 35 ±1°C |
| CASS chamber setting | 50 ±1°C |
| Saturated-air barrel setting | 47 ±1°C for NSS/AASS; 63 ±1°C for CASS |
| Brine temperature | 35 ±1°C (published product value; apply the selected method) |
| Fog collection rate | 1.0–2.0 mL per 80 cm² per hour |
| Published pH ranges | NSS/AASS: 6.5–7.2; CASS: 3.0–3.2. Confirm the exact method because AASS is normally acidic and should not be grouped with NSS. |
| Solution-tank capacity | 40 L |
| Safety protection | Overcurrent, overpressure, overtemperature and overload/fuse protection |
| Included accessories | Test salt, collection/measurement vessel and one spray-nozzle set, according to the published page |
| Compressed-air source | Air supply or compressor provided by the buyer; required cleanliness, pressure, flow and connection must be confirmed |
Engineering clarification: the original source grouped AASS with the neutral pH range. That is chemically inconsistent. The final quotation and operating manual must list separate solution preparation, pH, temperature and verification requirements for NSS, AASS and CASS.
Salt Spray Test Modes and Equipment Boundaries
NSS — Neutral Salt Spray
A continuous neutral salt-fog method widely used to detect coating discontinuities and verify process quality. ASTM B117 describes the apparatus and operating environment; the product specification determines exposure time and acceptance.
AASS — Acetic Acid Salt Spray
An acidified salt-spray method covered by ISO 9227 for particular coatings. It requires the correct acidic solution—not the NSS pH range.
CASS — Copper-Accelerated Acetic Acid
A more aggressive acidic method used for selected decorative and protective coatings. ASTM B368 and ISO 9227 provide applicable method requirements.
Full CCT — Cyclic Corrosion Testing
Alternates controlled phases such as salt fog, humidity, drying and dwell. Specify the exact OEM or laboratory cycle so DERUI can confirm whether extra humidity and drying modules are required.
Standards: What the Chamber Can Support
Common references include ASTM B117 for salt-fog apparatus operation, ISO 9227 for NSS/AASS/CASS methods and ASTM B368 for CASS testing. The applicable edition and the customer or product specification must be stated on the order.
- ASTM B117: establishes apparatus and environmental operating practice; it does not assign a universal exposure time or pass/fail limit.
- ISO 9227:2022 with Amendment 1:2024: specifies apparatus, reagents and procedures for NSS, AASS and CASS and explains the cabinet-corrosivity evaluation.
- ASTM B368: covers copper-accelerated acetic-acid salt-spray testing.
- OEM cyclic standards: may require controlled humidity, drying, solution changes and transitions that a basic salt-fog cabinet cannot reproduce.
Result interpretation: salt spray hours should not be presented as a direct prediction of outdoor service life. Use the product specification's exposure period, evaluation method and acceptance criteria.
Test Preparation and Verification Workflow
Define the Method
Confirm the standard edition, solution chemistry, pH, exposure mode, duration, specimen orientation and acceptance criteria.
Condition the Cabinet
Prepare the prescribed water and salt solution, stabilize temperatures and verify fog collection before loading qualification specimens.
Control the Exposure
Record temperature, collection rate, pH, interruptions and replenishment events without unnecessary lid opening.
Specimen Loading
- Use corrosion-resistant supports
- Maintain the specified orientation
- Prevent specimens from shielding one another
- Prevent condensate from dripping between samples
- Leave space for uniform fog circulation
Routine Checks
- Fog collection and distribution
- Chamber and saturator temperatures
- Solution concentration and pH
- Nozzle condition and air quality
- Tank, seals, drains and alarms
Typical Applications
Automotive Components
Coated brackets, fasteners, housings, trim, chassis parts and other components tested to supplier or OEM specifications.
Coatings and Plating
Powder coating, paint, zinc and nickel systems, anodized surfaces and conversion coatings.
Industrial Assemblies
Hardware, enclosures, electrical components, construction products and marine fittings that require batch exposure.
Information Needed Before Quotation
Test Requirements
- Exact standard and edition
- NSS, AASS, CASS or full CCT cycle
- Solution chemistry and phase sequence
- Test duration and reporting needs
- Required calibration or cabinet-corrosivity checks
Specimen and Facility
- Largest sample dimensions and mass
- Quantity per batch and fixture design
- Available compressed air quality and capacity
- Water quality, drain and exhaust conditions
- Voltage, doorway and installation space
Frequently Asked Questions
What does “200-Type” mean?
For this product it corresponds to a 2000 mm internal chamber width. The published internal dimensions are 2000 × 1000 × 600 mm, producing an approximate 1200 L working volume.
Is the DR-H304-200 a true cyclic corrosion test chamber?
The published specification confirms continuous and periodic spraying. A true CCT sequence with controlled humidity and drying requires additional systems. Provide the exact cycle so DERUI can confirm the configuration.
Can the same chamber run NSS and CASS?
The published temperature settings support both modes, but solution chemistry, pH, saturator temperature, materials compatibility and cleaning procedures differ. Confirm the final configuration and operating procedure.
Does ASTM B117 specify the test duration?
No. ASTM B117 defines the salt-fog apparatus and operating practice. The relevant coating, product or customer specification establishes duration and acceptance criteria.
Can salt spray hours predict outdoor service life?
Not directly. Salt spray testing is valuable for detecting defects and checking process consistency, but results should not be converted into a universal number of field-service years.
How should the chamber size be selected?
Use the largest specimen, batch quantity, fixture angle and required clearances. Samples must not block fog circulation or allow condensate to drip onto one another.
What utility does the buyer need to prepare?
Plan for the specified electrical supply, clean compressed air, suitable water, drainage, exhaust and service clearance. Final requirements must come from the approved configuration drawing.
What should be verified before a formal test?
Verify chamber and saturator temperatures, fog collection rate and distribution, solution concentration and pH, timing, specimen position and all required measuring records.
Match the Chamber to the Corrosion Cycle
Send DERUI the exact standard, phase sequence, specimen dimensions, batch quantity and facility utilities. We will confirm whether the DR-H304-200 periodic-spray configuration is sufficient or whether a full humidity-and-dry CCT system is required.
