Cyclic Corrosion Test Chambers – CCT Chamber:
QCCT-450L, QCCT-960L, and QCCT-1280L are advanced Cyclic Corrosion Test Chambers developed for various testing applications. They are designed for assessing the corrosion resistance of materials and coatings in different industries.
In most artificial accelerated tests conducted in laboratories, achieving consistent testing results with outdoor conditions is paramount. Before cyclic corrosion testing, the conventional method involved continuous salt spray at 35°C, which was the most popular way to simulate corrosion in a lab.
However, because conventional salt spray methods failed to replicate the natural wet/dry cycles of the outdoors, test results often showed poor correlation with outdoor conditions. To better mimic the complex and variable external natural environment, cyclic corrosion testing has gradually been recognized as an important and effective method for assessing the lifespan of industrial products.
Cyclic Corrosion Test Cabinets are also known as CCT Cabinets. Some industrial products need to undergo repeated cycles of salt spray, dry conditions, and high/low humidity environments. Initially, these tests were manually switched between several test chambers. The multi-functional Cyclic Corrosion Test Cabinets effectively address this issue by automating the testing of these cycles within a single chamber.
In a typical cyclic corrosion cabinet, all specimens undergo a series of different environments in a repetitive cycle that simulates outdoor conditions. Simple cycles, such as Prohesion, may involve alternating between salt fog and dry conditions. More complex automotive methods may require multi-step cycles that include humidity, dry air or condensation, salt spray, and dry-off.
Within one chamber, users can easily cycle through a series of the most significant corrosion environments. Even highly complex test cycles can be easily programmed with the controller. QCCT Cabinets can conduct salt spray and prohesion, and maintain 100% humidity for most cyclic automotive tests.
Cyclic Corrosion Test Cabinets set and control various parameters via a touch screen, combining multiple tests such as salt spray corrosion, humidity variations (high temperature/high humidity, low temperature/low humidity), and air drying (hot air drying and natural air drying) to simulate various cyclic corrosion scenarios. Specialized cyclic corrosion tests can also be simulated through the combination of other accessories.
Additionally, the instrument can perform neutral salt spray tests (NSS), acetic acid salt spray tests (AASS), copper accelerated acetic acid salt spray tests (CASS), water spray tests, damp heat tests, drying tests, and standard atmospheric environment tests separately.
Standards:
- ISO 11997-1:2005/: "Paints and varnishes—Determination of resistance to cyclic corrosion conditions—Part 1: Wet (salt fog)/dry/humidity"
- IEC 6008-2-78-2001/: "Inspection methods for environmental testing equipment for electric and electronic products—Part 2: Testing method—Test Cab: Damp heat, steady state"
- ISO 16701:2003: "Corrosion of metals and alloys - corrosion in artificial atmosphere - accelerated corrosion test involving exposure under controlled conditions of humidity cycling and intermittent spraying of a salt solution"
- ISO 14993:2001: "Corrosion of metals and alloys - accelerated testing involving cyclic exposure to salt mist, 'dry' and 'wet' conditions"
- ISO 16151:2005: "Corrosion of metals and alloys - Accelerated cyclic tests with exposure to acidified salt spray, 'dry' and 'wet' conditions"
- ISO 9227 – Corrosion tests in artificial atmospheres — Salt spray tests
- IEC 60068-2-78 – Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state (for damp heat chamber specifications)
- IEC 60068-3-4 – Environmental testing — Part 3-4: Supporting documentation and guidance — Damp heat tests (for salt mist chamber specifications)
- IEC 60068-2-52 – Environmental testing — Part 2-52: Tests — Test Kb: Salt mist, cyclic (sodium chloride solution) (for salt mist measurement methods)
- ISO 4611 – Plastics — Determination of the effects of exposure to humid atmospheres, water spray and salt mist
- ISO 16701:2015 – Corrosion of metals and alloys — Corrosion in artificial atmosphere — Accelerated corrosion test involving exposure under controlled conditions of humidity cycling and intermittent spraying of a salt solution
- ISO 14993:2001 – Corrosion of metals and alloys — Accelerated testing involving cyclic exposure to salt mist, 'dry' and 'wet' conditions
- ISO 16151:2005 – Corrosion of metals and alloys — Accelerated cyclic tests with exposure to acidified salt spray, 'dry' and 'wet' conditions
