ConstaSal® SC – ISO 9227 Salt Test Chamber

Liebisch ConstaSal® M-SC test chambers have been developed for salt spray corrosion tests such as DIN 50021, TS EN ISO 9227, ASTM B117, and ASTM B368. The cabinet-type device, except for the glass lid, is made entirely of glass-reinforced plastic. There are no metallic components or heating units inside the test chamber that could be affected by corrosion, enabling the device to withstand years of corrosion testing without degradation.

The ConstaSal® M-SC test chambers are available in three volume options—400, 1000, and 2000 liters—depending on the sample size and quantity. The front-loading design makes them ideal for large and small test specimens. This loading method allows easy access to every part of the chamber and enables observation of the test during operation. Optionally, the chambers can be equipped with interior lighting for better visibility. In 400 and 1000-liter models, the lid opens sideways, while the 2000-liter model features a gas-spring-assisted upward-opening lid for convenient loading of long specimens.

The specially designed wide heating cells of the ConstaSal® SC are located in the side walls and are fully thermally insulated, ensuring extremely homogeneous temperature distribution and excellent energy efficiency. These cells are completely isolated from the corrosive test atmosphere, allowing for years of trouble-free use without the need for service. The ConstaSal® SC features two separate outlets for exhaust and drainage, optimizing salt fog retention inside the chamber and preventing corrosion of other equipment in the laboratory. A removable filter in the drain outlet prevents clogging from corrosion residues, ensuring a reliable and smooth test environment.

ConstaSal® M-SC is designed for 24/7 operation. In many customer setups, the device operates continuously for years, with samples inspected daily, completed tests removed, and new samples loaded. It features a humidification tower with a fixed-level system, automatically fed by a pressurized demineralized water line. The tower includes pressure sensors for both low and high air pressure alerts and protections. Inlet and outlet air pressures are displayed on the device’s manometer, allowing the humidity quality to be closely monitored.

ConstaSal® M-SC is extremely easy to use. The test chamber and humidification tower temperatures are set separately according to the relevant standard. The spray nozzle pressure is adjusted to around 1 bar for an optimal spray profile, and the digital dosing pump is calibrated to deliver the appropriate saltwater solution required by the test standard to achieve the necessary condensate accumulation. The sophisticated, calibratable digital dosing pump allows highly stable dosing, unaffected by hose softness or hardness like peristaltic pumps, and requires no monthly maintenance or part replacement by the operator.

At the end of the test or before sample inspection, the operator opens the ventilation valve to blow pressurized air into the chamber, expelling salt mist through the exhaust. Within a few minutes, the lid can be safely opened without releasing corrosive fumes into the lab and damaging nearby equipment.

Temperature control for both the test chamber and the humidification tower is managed by the Liebisch Temperature Controller. Thanks to carefully calculated PID control parameters for each chamber size, temperature fluctuation remains within ±1°C. Optionally, the device can be equipped with a cycle timer to automatically stop the test after a set duration.

ConstaSal® M-SC operates reliably for years without maintenance if supplied with high-quality air, demineralized water, and salt. However, annual preventive maintenance is recommended due to potential algae formation in the solution intake line and contamination in the humidification tower from impure air. With favorable environmental conditions, the maintenance interval can be extended up to two years. Maintenance is carried out by Kar Kimya’s locally based service team in Turkey.