Chamber Structure

Ø  The chamber body, both interior and exterior, is entirely welded from high-temperature-resistant and flame-retardant PP (polypropylene) material. It is corrosion-resistant, easy to clean, and ensures no leakage；

Ø  The chamber cover is also made of PP material. For models 010 and above (large chambers), pneumatic cylinders are used for opening and closing the cover. Model 750 uses stainless-steel gas struts to assist lid opening；

Ø  A tower-type or baffle-type spray system is used, equipped with non-crystallizing glass nozzles. The system adopts a siphon-based spray principle, ensuring uniform salt spray distribution with adjustable sedimentation rate；

Ø  A rear air-circulation duct or an external auxiliary cabinet is used inside the chamber. The heating tubes, refrigeration evaporators, fan impellers, and fan shafts inside the airflow duct or auxiliary cabinet are all made of pure titanium；

Ø  Silicone rubber seals are used between the chamber body and the chamber cover (non-water-seal design), ensuring no salt spray leakage；

Ø  The control circuit board and other components are installed in easily accessible locations. A lockable side access door is provided for inspection and maintenance. Electrical and water piping systems adopt a water–electricity separation design；

Ø  The refrigeration system uses a Copeland scroll compressor, typically water-cooled. Other refrigeration components—such as solenoid valves, oil separators, receivers, check valves, and filters—are sourced from international brands including Castel, Danfoss, Emerson, and Ranco. Refrigerant is DuPont-brand imported refrigerant.

Control System

Ø  7-inch touchscreen with PLC programmable control; test programs can be freely edited；

Ø  Continuous or cyclic spraying modes available. Cyclic (combined) salt spray tests can perform salt spray, damp heat, immersion, drying, and alternating conditions；

Ø  Electrical components use ABB, Omron, Carlo Gavazzi, or Noyak (UL-certified) components, fully compliant with U.S. electrical requirements；

Ø  Multiple protection features including over-temperature protection, low-water-level alarm, and timing alarms ensure safe operation.

Test Methods

Ø Neutral Salt Spray (NSS) test，ASS – Acetic Acid Salt Spray (including sulfuric acid conditions per GJB150.28A)，CASS – Copper-accelerated Acetic Acid Salt Spray，dwell, humidification, drying, natural air-drying, constant temperature and humidity, saltwater spray, freshwater spray, etc., in cyclic operation.。

Compliance with Standards
The equipment is designed and manufactured in accordance with the following standards:
Chinese Military Salt Spray Test Standard GJB 150.11A-2009; Chinese Military Acetic Acid Salt Spray Standard GJB 150.28A-2009; GB/T 1771-2007 Paints and Varnishes — Determination of Resistance to Neutral Salt Spray (NSS); GB 2423.17 Environmental Testing for Electric and Electronic Products — Salt Mist Test; GB 2423.18-2021 Environmental Testing — Alternating Salt Spray Test (Sodium Chloride Solution); DIN 50014-1985 Climatic Conditions and Their Technical Application — Standard Climates; DIN 50017-1982 Climatic Conditions and Their Technical Application — Condensation Water Climate Test Cabinet; DIN 50021-1988 Salt Spray Tests Using Various Sodium Chloride Solutions; PV 1210-2004 Corrosion Testing of Vehicle Bodies and Components; ASTM G85 Standard Practice for Modified Salt Spray (Fog) Testing; GB/T 10125-1997 Corrosion Tests in Artificial Atmospheres — Salt Spray Tests; GB/T 12967.3-2008 Test Methods for Anodic Oxidation Coatings on Aluminum and Aluminum Alloys — Part 3: Copper-Accelerated Acetic Acid Salt Spray (CASS) Test; QB/T 3826-1999 Neutral Salt Spray (NSS) Test Method for Metallic Coatings and Chemical Treatments on Light Industry Products; QB/T 3827-1999 Acetic Acid Salt Spray (ASS) Test Method for Metallic Coatings and Chemical Treatments on Light Industry Products; QB/T 3828-1999 Copper-Accelerated Acetic Acid Salt Spray (CASS) Test Method for Metallic Coatings and Chemical Treatments on Light Industry Products; GB/T 5170.8-2008 Verification Methods for Environmental Test Equipment — Salt Spray Test Chambers; GB 10587 Technical Requirements for Salt Spray Test Chambers.。

Acceptance Conditions

ASTM B117 – Neutral Salt Spray Continuous Test；ISO 16750-4 – Salt Spray / Temperature & Humidity Cycling；GB 2423.18 – Salt Spray / Humidity / Dwell Alternating Test；VW 80000 – Spray / Dwell Alternating Test with Powered Operation；GMW 3172-9.4.7 – Salt Spray / Humidity Alternating Test；GMW 3172-9.4.8 – Drying / Spray Alternating Test.