Application
The salt spray test chamber is used to evaluate the corrosion resistance of products whose surfaces have undergone treatments such as electroplating, anodizing, painting, or anti-rust oil coating. It is designed for neutral salt spray (NSS) tests and helps assess how well materials and coatings withstand corrosive environments over time.

Standards
Complies with the following test standards:

• CNS 3627, 3885, 7669, 8886
• JIS D-0201, H-8502, K-5400, Z-2371
• ISO 3768
• ASTM B117, B268
• GB/T 2423
• DIN 50021-SS

Features

• Durable, corrosion-resistant chamber construction
  The chamber body is made from 5 mm imported grey PVC plates, reinforced with a three-dimensional internal support structure for high strength, deformation resistance, and long-term stability. It offers excellent resistance to acids, alkalis, high temperatures, and aging, and is suitable for salt spray, copper acetate, and other corrosion tests.
• Efficient, uniform heating system
  The test room uses direct steam heating for fast and even temperature rise, reducing waiting time before testing. The heating elements are titanium tubes with excellent corrosion resistance and long service life.
• Built-in spray collection system
  Equipped with two built-in spray-quantity collection cylinders (one for 60 L models), which are more reliable and less prone to damage than traditional external collection devices.
• Flexible, corrosion-resistant sample racks
  The interior uses flat dividing shelves with φ10 mm toughened glass rods and plastic-steel V-type supports. This design keeps samples at a 30° incline (adjustable as needed) and ensures that the direction of spray fall is consistent with the spray direction, allowing a large number of test pieces to be mounted.
• Robust machine base with easy mobility
  The base is welded from SECC U-bars and angle steel with spray coating for strength and rigidity. Four casters allow the chamber to be moved easily (for 120 L and larger models).
• High-strength pressure barrel
  The pressure barrel is made from 2.0 mm SUS201 stainless steel with seamless welding to ensure strength and durability under test pressure.
• Transparent, high-quality chamber cover
  The chamber cover is made from 5 mm imported transparent acrylic sheet with fine workmanship, offering an attractive appearance and allowing clear observation of the test process.
• Over-temperature safety protection
  Dual over-temperature protection includes warning indication and automatic power cut-off of the heater when temperature exceeds the set limit, ensuring safe operation.
• Automatic exhaust and clear observation
  An automatic spray exhaust device helps maintain internal conditions and allows unobstructed viewing of samples during testing.
• Convenient water supply tank
  The make-up water tank is hidden, with an integrated water-level viewing window. It is easy to access and clean and is designed to resist cracking.

Specifications

Model	GT-F50AA-1	GT-F50AA-2	GT-F50AA-3	GT-F50AA-4	GT-F50AA-5
Inside chamber dimension (w x d x h cm)	60 x 45 x 40	90 x 60 x 50	120 x 100 x 50	160 x 100 x 50	200 x 120 x 60
Outside chamber dimension (W x D x H cm)	107 x 60 x 118	141 x 88 x 128	190 x 130 x 140	230 x 140 x 140	270 x 150 x 150
Test chamber volume	108 L	270 L	600 L	800 L	1440 L
Brine tank	15 L	25 L	40 L	40 L	40 L
Control method	LED meter
Plastic plate thickness	5 mm
Temperature of Test Chamber	Brine test method 35℃±1℃
Temperature of Pressure Barrel	Brine test method 47℃±1℃
Brine temperature	35℃~ 50℃
Brine concentration	5% sodium chloride solution concentration)
Compressed air pressure	1.00±0.01 kgf/cm2
Spray volume	1.0~2.0 ml / 80 cm2/h (gather at least 16 hours, take its average)
Relative Temperature of Test Chamber	Above 85%
PH-value	Neutral: 6.5~7.2
Spray method	Continuous spray or intermittent spray
Power supply	AC220V1Φ10A	AC220V1Φ15A	AC220V1Φ30A
Temperature range	Laboratory temp.	35℃- 50℃ (can be arbitrarily set)
	Pressure barrel temp.	47℃- 63℃ (can be arbitrarily set)
Temperature rising speed	Laboratory	Room temperature → 35℃ about 35 minutes
	Pressure barrel	Room temperature → 47℃ about 15 minutes
	Temp. accuracy	±1℃

Product Details
Control System

• Uses an imported DHC temperature controller with digital display, PID control and SSR output.
• Equipped with a high-stability platinum temperature probe with an accuracy of ±0.1 °C.
• During salt spray testing, chamber temperature is controlled within ±1 °C.
• The saturation pressure barrel follows Henry’s law to keep chamber humidity above 95%, in line with national standards. It provides heating and humidification to maintain the required test room temperature.
• The barrel is made of SUS 304 stainless steel for excellent heat retention and durability, and includes sight fittings and a drain valve to easily check the water level and clean the barrel.

Timing System

• Uses an imported digital timer with precise time control.
• Test time can be set independently in hours, minutes and seconds for each segment.
• Time range: 0.01 seconds to 9999 hours.
• Includes power-off memory: after power is restored, the timer resumes from the point before the power failure, avoiding the need to repeat the test.

Water Supply System

• Combines automatic and manual water supply.
• When the water level is low, the system automatically refills and issues a low-water-level warning to ensure safe operation.
• Continuous water supply supports different environmental test requirements.

Nozzle System

• Uses a precision glass nozzle made from special glass to ensure uniform spray distribution and natural fall onto the specimens.
• Designed for long service life (up to 4000 hours of continuous use) without salt crystal blockage.
• A conical disperser on the spray tower provides spray direction control, spray volume adjustment and uniform spray distribution.

Sealing Method

• The test chamber lid is made from imported PVC plate and operated by pneumatic cylinders for automatic up-and-down movement, offering convenient, safe and reliable operation.
• The inner and outer chamber bodies are connected via a sealing groove and water-seal channel.
• A water-seal design is used to prevent spray leakage and maintain tight sealing during testing.

Control Method

• All controls are integrated in a single front panel for easy, intuitive operation.
• Standard operation uses five keys:
  1. Power switch
  2. Operation switch
  3. Spray switch
  4. Timing switch
  5. Spray exhaust switch
• Typical workflow:
  1. Turn on the power; the instrument automatically fills water.
  2. Turn on the operation switch and set the test temperature; the chamber begins automatic heating.
  3. Turn on the spray switch to start spraying.
  4. Turn on the timing switch and set the test duration; the timer stops when the set time is reached.
• Includes a manual spray exhaust function to purge spray from the chamber and make it easier to inspect or remove test specimens during or after the test.

Safety Protection Devices

• Dual over-temperature protection: automatically cuts off heater power if the temperature controller or heating system fails to prevent damage from overheating.
• Dual low-water-level protection: prevents dry-burning of heater tubes in both the test chamber and the pressure barrel.
• Overload and short-circuit protection: safeguards the instrument and its components in case of abnormal electrical conditions or low water level, helping to avoid damage and unsafe operation.