Introducing the QPSST Series Fully Programmable Salt Spray Testers with extended capacities of up to 1280L, the latest addition to Qualitest's lineup of salt spray tester cabinets. These cutting-edge testers offer a host of advantages, surpassing the capabilities of the standard QSST Salt Spray Tester series models.

Available Models:

Programmable Salt Spray Test Chambers by Qualitest

Precise Temperature Control: The working room temperature is accurately controlled using air heating technology. Electric heating wires embedded in the inner plate rapidly heat the chamber to the desired temperature, ensuring the concentration and pH value of the spray solution remain unaffected. Utilizing P.I.D heating control, the heater achieves optimal temperature balance.
Robust Construction: Designed and manufactured with durable materials and a sleek design, these Programmable Salt Spray Tester and corrosion cabinets feature a titanium inner plate and a stainless steel outer plate with a protective paint treatment. A concealed water gauge facilitates easy salt solution replenishment without risk of breakage. The inclined plane cabinet cover prevents water from collecting on the sample surface. The seal cover, driven by an air cylinder, effortlessly opens and closes with the press of a button. Silica gel seal strips prevent corrosion gas leakage, while the complete separation of water and electricity within the cabinet safeguards against damage to electrical components.
Innovative Sample Holder Design: A newly designed standard sample holder comprises a plane dividing rack atop the working room. The rack includes circular rods and V-shaped glass fiber brackets for sample placement, with the ability to adjust angles for optimal positioning. The lower layer features a plane mesh plate capable of supporting large samples with a distributed weight capacity exceeding 200 kg/m2.
Spray Solution Delivery System: A high-capacity external tank supplies salt water to the nozzle via a peristaltic pump, preventing traditional siphon spray nozzle crystallization. The peristaltic pump's flow rate is adjustable, ensuring consistent spray solution delivery.
Programmable Controller: All testing parameters are customizable using the TEMI 880 programmable controller with a user-friendly touchscreen interface. Set parameters include spraying methods and cycles, with fog spray capabilities allowing for continuous or interval testing.
Advanced Communication Features: Equipped with an RS 232 interface, the testers support local and remote communication, compatible with the RAS-2003 monitor software for up to 16 simultaneous connections. Included software enables users to edit and save test programs, facilitating seamless transfer between the controller and PC.
Curve Recording Capability: Featuring battery-protected RAM, the testers can store machine settings, sampling data, and times for up to 360 days (with a 2-minute sampling cycle).

Qualitest’s QPSST Series programmable salt spray chambers execute accelerated corrosion testing by replacing static misting with tightly regulated climate controls. Managed through a programmable color touchscreen interface, standard atomization feeds a 5% saline solution to the spray nozzle using an adjustable peristaltic pump.

This continuous fluid feed eliminates salt crystallization issues common with traditional siphon tubes. Saturated air enters from a dedicated humidifying tower operating between RT+5°C and 63°C, while electric heating wires embedded in titanium inner walls warm the workspace from RT+5°C to 50°C (reaching 50°C in under 60 minutes) to meet ASTM B117 heating requirements.

For programmable testing, QPSST cabinets mix moist salt vapor with dry air streams to achieve target relative humidity levels on command. The internal controller calculates moisture and salt mass ratios continuously to balance heat and liquid volumes. An air-cylinder driven cover sealed with silicone strips prevents gas leaks, while an inclined lid design prevents condensation droplets from falling directly onto test surfaces.

Control Systems, Monitoring, and Evaluation Methods

Testing Approach	Operating Principle	Primary Parameter Controlled	Governing Standard
Fog Collection Funnels	Dripping mist settles into funnel cups over set time blocks	Fallout deposition rate (1–2 mL per 80 cm² per hour)	ASTM B117 / ISO 9227
P.I.D. Thermal Regulation	Titanium wall wires and saturator heaters adjust energy output	Working room (35°C/50°C) and tower temperatures	ASTM B117 / ISO 9227
Touchscreen System Logging	Color touch panel records cycle parameters and test settings	Operational settings and cycle duration records	Internal Quality Audits
Peristaltic Pump Monitoring	Adjustable motor feeds saline liquid at set flow rates	Uniform solution supply without nozzle clogging	ASTM B117 / ISO 9227
Mass-Loss Metal Coupons	Standardized steel plates weighed before and after exposure	Overall chamber corrosive intensity	ASTM / ISO Standards

Legacy cabinets require manual funnel checks after testing ends to verify box conditions. QPSST chambers streamline this process through automated data logging and closed-loop P.I.D. temperature control. Complete water and electrical separation protects internal components, while the system logs operational settings automatically. This real-time tracking verifies that steel specimens experience consistent corrosive action, generating surface rust more than five times faster beneath a thin, moist salt film than during total immersion in bulk salt water.

Test Operating Modes and Standard Compliance

Neutral Salt Spray (NSS): Atomizes a 5% sodium chloride solution at pH 6.5–7.2 with a 35°C chamber temperature, establishing a baseline testing environment for protective coatings and metallic parts.
Acetic Acid Salt Spray (AASS): Introduces glacial acetic acid to drop the solution pH to 3.1–3.3, accelerating chemical attack on anodized aluminum and decorative coatings.
Copper-Accelerated Acetic Acid Salt Spray (CASS): Adds copper chloride to the acidified salt solution while raising chamber temperatures to 50°C, creating an aggressive environment for electroplated nickel-chromium layers.
Interval and Cyclic Spray Modes: The programmable touch controller alternates between continuous fogging, interval spraying, and drying phases to simulate fluctuating real-world environmental exposure.
Capacity and Standard Support: Available across three capacity options: the QPSST-450L (450 liters, 65 sample capacity), QPSST-960L (960 liters, 152 samples), and QPSST-1280L (1280 liters, 190 samples, with heavy-duty mesh racks supporting component loads over 200 kg/m²). These units satisfy ASTM B117, ISO 9227, ASTM G85, ASTM B368 (CASS), and DIN 50021 testing protocols.