Best Salt Spray Test Chamber 390 Liter – Model SST-390A | UMA Industries & Machine Control Systems Faridabad

The SST-390A Salt Spray Test Chamber (390 Liter) is a premium
salt spray test chamber / salt fog chamber / corrosion test chamber
designed and manufactured by
UMA Industries and Machine Control Systems, Faridabad (India),
and supplied through phmeters.in.

This advanced salt spray chamber is ideal for laboratories and industries that need
reliable, repeatable corrosion resistance testing as per
ASTM B117 and ISO 9227. It is widely used for
neutral salt spray (NSS) testing of ferrous and non-ferrous metals, coatings,
paints, platings and surface treatments in automotive, fastener, hardware, plating, powder-coating
and metal finishing units.

Highlights – Why SST-390A is the Best Salt Spray Test Chamber

• Chamber capacity: 390 Liter (overall size approx. 6 ft × 3 ft × 4 ft)
• Standards: conforms to ASTM B117 and ISO 9227 – Corrosion tests in artificial atmospheres
• PLC operated system with coloured HMI touch screen
• Automatic door opening by switch and pneumatic cylinders
• Digital graphical display for time, temperature and humidity trends
• Digital pH meter for online monitoring of brine (salt) solution
• Saline concentration meter to measure and display salt concentration
• Long-term data memory (up to years) with USB port for pen drive data transfer
• Rugged construction and easy maintenance, designed by UMA Industries & Machine Control Systems Faridabad

Special Features – Salt Spray Chamber 390 L (SST-390A)

• Chamber capacity: 390 Liter laboratory corrosion test chamber
• Internal chamber size (L × W × H): 730 × 730 × 730 mm
• Overall machine size (approx.): 1800 × 900 × 1200 mm
• Main chamber: PP / FRP moulded body – anti-corrosive and durable
• Top cover: 5 mm clear acrylic transparent lid for viewing test samples
• Sample mounting: 8–9 material hangers / rods (depending on maximum job size)
• Separate main water tank: 60–80 Liters, isolated from spray chamber
• Low saline level indication on front panel
• Automatic filling and level maintaining system for reservoir saline tank using sensors
• Automatic drainage system for chamber waste water – no manual drain
• Compressed air circulation in saline tank to prevent salt settlement and ensure uniform concentration
• Fully automatic temperature controller with dual display for water heating
• Over-temperature warning indicator on front panel
• Separate digital indicators for chamber temperature and humidity
• Shock-free, anti-corrosion, unbreakable heaters (no glass heaters; long life design)
• Centralized fogging system as per ISO 9227 and ASTM B117
• Standard fog collection system with collectors / funnels as per ASTM B117
• Automatic fog operation controlled by process switch ON / OFF
• Hour meter: up to 999 hours 59 minutes for long test cycles
• Digital online pH meter with sensor for continuous monitoring of saline solution pH
• Digital humidity meter with sensor to measure chamber humidity
• Process complete buzzer and indicator at end of test
• Power supply: 220 VAC, single phase
• Warranty: 1 year against manufacturing defects

Models in Our Salt Spray / Corrosion Test Chamber Range

In addition to the SST-390A 390-liter salt spray chamber, UMA Industries & Machine Control Systems also manufacture:

• Salt Spray Chamber 162A – standard laboratory model
• Laboratory Salt Spray Chamber 162B – ASTM B117 compliant
• Salt Spray Chamber 216A – standard model
• Corrosion Spray Test Chamber 216B – ASTM B117
• Salt Spray Chamber 240A – standard ASTM B117
• Latest Salt Spray Chamber 1KB – ASTM B117 with graphical display
• Custom designed salt spray / corrosion test chambers as per any required size or specification

Working Principle – Salt Spray / Corrosion Test (ASTM B117 / ISO 9227)

1. Scope

The salt spray test chamber is used for salt fog testing of
ferrous and non-ferrous metals and for testing organic and inorganic coatings,
paints, platings and surface treatments. Such tests form the basis for material and product
specifications where corrosion resistance is critical.

2. Apparatus

The complete salt spray / corrosion test apparatus consists of:

• A closed fog chamber (test chamber)
• Salt solution reservoir and circulation system
• Oil-free, dust-free air supply system with regulator and filter
• One or more atomizing nozzles for generating salt fog
• Specimen supports / hangers
• Heaters for heating water and solution
• Digital instruments and control systems for temperature, humidity, time, pH and fog rate

Temperature Control

The exposure zone of the salt spray chamber for neutral salt spray testing is maintained at
35 ± 2 °C. A digital temperature controller with auto-cut keeps
fogged water temperature within 32–37 °C, and a separate indicator shows
the chamber temperature.

Digital Timer

A 6-digit digital timer (hours and minutes) is provided to monitor the total
test duration and inspection intervals, with at least three digits for hours and two digits for minutes
for long test cycles.

pH Control of Salt Solution

A built-in digital pH meter is used to check and monitor the pH value of the salt solution.
According to ASTM B117, when atomized at 35 °C, the collected solution pH must remain
in the range 6.5 to 7.2. The SST-390A makes it easy to maintain this neutral pH range.

Air Supply

The air supply to the salt spray chamber is oil-free and dust-free.
Air pressure is regulated so that a uniform salt fog is generated. Typical operating pressure is
1.0 kg/cm² ± 0.2 kg/cm².

Atomization and Fog Quantity

The atomizing system creates a fine salt fog / mist. For every
80 cm² (4-inch funnel) horizontal collecting area, the collected solution shall be
1.0 to 2.0 mL per hour, based on an average of at least 16 hours of operation,
as specified in ASTM B117.

Electrical and Warranty

• Power supply: 220 VAC, single phase
• Warranty: 1 year against manufacturing defects

FAQ – Salt Spray Test Chamber / Corrosion Test Chamber SST-390A