How can run a salt spray test using a salt spray chamber?

When evaluating the corrosion resistance of metals, coatings, or fasteners, replicating real-world exposure to saline environments is critical. Salt spray testing allows laboratories and manufacturers to accelerate corrosion processes under controlled conditions, producing reliable, repeatable data that guides material selection, coating formulation, and product design.

LIB's Salt Spray Test Chambers are engineered to deliver precise, long-term testing under ISO, ASTM, and industry-specific standards. With accurate control of temperature, humidity, and salt deposition, LIB chambers ensure that every test runs consistently and meets global compliance requirements.

Salt spray testing is not only a regulatory requirement but a valuable tool for quality assurance, helping manufacturers predict product longevity and minimize field failures. By using LIB's chambers, operators can monitor tests in real time, maintain repeatable conditions, and generate comprehensive reports-all with minimal manual intervention.

Salt spray testing must comply with internationally recognized standards to ensure that results are valid and comparable across labs and industries. Key standards include:

ISO 9227: Covers Neutral Salt Spray (NSS), Acetic Acid Salt Spray (AASS), and Copper-Accelerated Acetic Acid Salt Spray (CASS) methods.

ASTM B117: The widely adopted standard for neutral salt fog testing of coated and uncoated metals.

ASTM G85: Provides guidelines for cyclic corrosion testing, including wet/dry phases.

JIS Z 2371: Japanese standard for salt spray testing of metals.

SAE J2334: Automotive industry guideline for cyclic corrosion exposure.

Among these, ISO 9227 Neutral Salt Spray (NSS) is the most common method. It uses a 5 % sodium chloride solution at pH 6.5–7.2, sprayed continuously at 35 ± 2 °C. Deposition rates are strictly maintained at 1–2 mL per 80 cm² per hour. Specimens are mounted on V-groove or round-rod holders and exposed in a chamber equipped with a salt spray tower, quartz nozzles, and preheated air. The NSS test provides a baseline for general corrosion resistance, while AASS and CASS simulate more aggressive or decorative coating scenarios by lowering pH (3.1–3.3 for AASS) or adding copper chloride (0.26 g/L for CASS).

By following these procedures, labs ensure reproducibility, regulatory compliance, and valid comparison across different coatings, metals, and environmental conditions.

Salt Spray Corrosion Test Chambers for Corrosion Test

 

1. Advanced Salt Spray Chamber ASTM B117

2. ASTM G85 Salt And SO2 Spray Test Chamber

3. SO2 Noxious Gas Test Chamber

4. SO2 H2S Noxious Gas Corrosion Test Chamber

5. Environmental Chamber Temperature Humidity Control

6. Sand Dust Testing Chamber for dustproof chamber

Consistency is key in salt spray testing. LIB Salt Spray Test Chambers achieve this through advanced PID temperature control and PT100 Class A sensors with 0.001 °C accuracy. The chambers maintain test temperature within ±0.5 °C and total deviation within ±2 °C.

Salt fog concentration is stabilized by corrosion-resistant quartz nozzles and a high-quality salt spray tower delivering 83 kPa spray pressure. Deposition rates are continuously monitored with a precision collector to ensure 1–2 mL per 80 cm² per hour, fully compliant with ISO 9227 and ASTM B117.

Additional features contributing to long-term stability include:

1. Automated water inlet with dry-burn protection, preventing damage from low water levels.

2. Saturated barrel preheating and humidification for uniform salt fog.

3. Corrosion-resistant A3 steel exterior and inverted-V transparent lid to prevent condensation and extend component life.

4. Removable and adjustable sample holders for flexible test setups.

Model	S-150
Internal dimensions (mm)	470*590*400
Overall dimensions (mm)	620*1400*1050
Temp. Range	Ambient ～ +60 degree
Temp. Fluctuation	± 0.5 ℃
Temp. Deviation	± 2.0℃
Humidity Range	95 % ~ 98 % RH
Salt Fog Deposition	1～2ml / 80cm2 · h
Spray Type	Continuous / Periodic
Heating Element	Nichrome heater
Salt Fog Collected	Fog collector and fog measure cylinder
Controller	PID controller
Material	Glass fiber reinforced plastics
Standard Configuration	8 round bars and 7 V-shaped grooves

These design elements reduce variability, prevent "false passes," and ensure that tests can run continuously for weeks or months without human intervention.

LIB offers three main types of salt spray testing systems, each designed for specific applications and corrosion scenarios.

Basic Salt Spray Chamber
The Basic Salt Spray Chamber is ideal for standard NSS, AASS, and CASS testing. It delivers a stable spray through corrosion-resistant quartz nozzles at 83 kPa and maintains a deposition rate of 1–2 mL per 80 cm² per hour. PT100 Class A sensors ensure temperature accuracy within ±0.001 °C. Automated water refill and dry-burn protection minimize downtime and safeguard equipment. Available in capacities from 108 L to 1600 L, it suits small to medium laboratory workloads efficiently.

Cyclic Corrosion Chamber (CCT Chamber)
The CCT Chamber simulates real-world multi-phase corrosion conditions, including salt fog, high humidity, temperature cycling, and drying. It maintains temperature within ±0.5 °C, humidity within ±2 % RH, and deposition at 1–2 mL/80 cm² per hour. The intuitive touchscreen controller allows up to 120 program profiles with 100 steps each, supporting complex testing routines. The chamber's glass-fiber reinforced workroom is highly resistant to acid gases and salt fog, ensuring durability for repeated cycles.

Salt Fog and SO₂ Corrosion Chamber
For aggressive testing, the Salt Fog and SO₂ Chamber combines salt fog exposure with sulfur dioxide gas to simulate harsh industrial environments. It provides precise control of temperature (+10 ℃ to +90 ℃), humidity (30 %–98 % RH), and SO₂ concentration (25 ± 5 ppm). Integrated PID control and PT100 sensors maintain deviations within ±0.5 ℃, ±1 % RH, and ±0.1 % FS. The chamber supports multi-day tests from 4 to 21 days, includes dry-combustion protection, automated SO₂ exhaust, and closed-loop water recovery for safe, efficient operation.

Choosing the right chamber depends on your testing goals-whether you need basic corrosion evaluation, field-condition simulation, or acidic pollutant exposure testing. Each LIB system ensures repeatable results, compliance with ISO 9227, ASTM B117, and related standards, and long-term operational reliability.

Q1: How should liquid from a sulfur dioxide salt spray test be disposed of?
A1: The waste is weakly acidic and water-soluble. Collect it through the chamber's drainage system and treat it according to local regulations for neutralization and environmental safety.

Q2: How is sealing achieved in a sulfur dioxide salt spray test?
A2: Chambers use pressurized closures with hard silicone seals and lever mechanisms to compress doors, ensuring a stable and secure environment.

Q3: Will the heating system damage the chamber material?
A3: LIB chambers use fiberglass-reinforced materials resistant to corrosion and high temperatures up to 110 °C.

Q4: Does the saturation tank have dry-burn protection?
A4: Yes. The standard system automatically shuts off heating when water is low to prevent damage.

Q5: Can manual covers be replaced with pneumatic ones?
A5: Absolutely. LIB supports upgrades from manual transparent lids to pneumatic fiberglass lids for convenience and safety.

With precise salt fog delivery, automated environmental control, and robust construction, LIB Salt Spray Test Chambers deliver accurate, repeatable corrosion testing under ISO 9227, ASTM B117, ASTM G85, and other international standards. Our global service team provides 3-year warranty coverage and lifetime technical support, ensuring peace of mind for laboratories worldwide.

Contact LIB  Industry today to learn how our salt spray chambers can enhance your product durability validation, accelerate development timelines, and elevate your testing efficiency.