Q-FOG CRH cyclic corrosion chambers can perform traditional salt spray, Prohesion, and most cyclic automotive tests. They feature fully-adjustable relative humidity and precise control over ramp times. An optional shower function is also available. Q-FOG CRH chambers are available in two sizes to fulfill a wide range of testing requirements.

The Q-FOG model CRH represents a true breakthrough in the price-performance ratio of corrosion testers with RH control. It can perform most major automotive corrosion test standards, such as GMW 14872, SAE J2334, and many others from Ford, ISO, GB/T, VW, Volvo, Chrysler, Renault, etc.

The tester has all the features and advantages of the model CCT, but also adds full variable humidity control through the use of an innovative air pre-conditioner. Additionally, the CRH model includes an optional Shower Function. Spray droplets are much bigger, flow rates are much higher, and shower times are much shorter than the atomized mist in the Salt Fog Function. The CRH tester features an advanced cleaning feature for spray nozzles that prevents the clogging frequently found in competitive chambers.

Within one Q-FOG CRH chamber, it is possible to cycle through a series of the most significant corrosion environments. Even extremely complex test cycles can easily be programmed with the Q-FOG controller.

Cyclic corrosion testing

Cyclic corrosion testing provides the best possible laboratory simulation of natural atmospheric corrosion. Research indicates that test results are similar to outdoors in resulting structure, morphology, and relative corrosion rates.

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Prior to cyclic corrosion testing, conventional salt spray (a continuous salt spray at 35˚C), was the standard way to simulate corrosion in a lab. Because conventional salt spray methods failed to mimic the natural wet/dry cycles of the outdoors, test results frequently provided poor correlation to outdoors.

In a Q-FOG cyclic corrosion tester, specimens are exposed to a series of different environments in a repetitive cycle that mimics the outdoors. Simple cycles, such as Prohesion, may consist of cycling between salt fog and dry conditions. More sophisticated automotive methods may call for multi-step cycles that incorporate humidity or condensation, along with salt spray and dry-off.

Within one Q-FOG chamber, it is possible to cycle through a series of the most significant corrosion environments. Even extremely complex test cycles can easily be programmed with the Q-FOG controller. The Q-FOG controller includes complete self-diagnostics, including warning messages, routine service reminders and safety shut down.

Easy programming and sample mounting

The Q-FOG tester has a low belt line and an easy opening lid for easy sample mounting. The SSP-600 and CCT-600 models have a capacity of about 160 test panels of 75 mm × 150 mm in size. The SSP-1100 and CCT-1100 models have a capacity of 240 test panels.

Precise control of fog dispersion

The Q-FOG CRH cyclic corrosion chamber has superior fog dispersion compared to conventional systems, which cannot vary volume and distance independently. A variable speed peristaltic pump controls the amount of corrosive solution delivered to the spray atomizer, while the air pressure regulator controls the distance of the “throw”. Note that purified water is required for proper operation of Q-FOG corrosion testers.

Internal solution reservoir

Space utilization is maximized and maintenance is minimized with the Q-FOG tester's internal solution reservoir. The 120 litre reservoir has enough capacity for running most tests for 7 days or more. The reservoir has an integral particulate filter and a built-in alarm to alert the operator when the solution is low.

Fast cycling

Q-FOG testers can change temperatures exceptionally fast because of their unique internal chamber heater and their high volume cooling/dry-off blower. An additional air heater allows very low humidity dry-off exposures. Conventional chambers with water jackets cannot cycle rapidly because of the thermal mass of the water, nor can they produce low humidity.

Affordable

Q-FOG cyclic corrosion testers offer state of the art corrosion testing technology, reliability, ease of operation and easy maintenance – all at a remarkably affordable price.

Important features

• Two convenient chambers sizes (600 and 1100 litres) to accommodate small and large specimen quantities
• Easy sample mounting – low belt line and an easy-opening lid for easier access during sample mounting
• Reinforced fiberglass construction – robust, heavy-walled chamber and lid have low thermal conductivity for efficient, precise temperature control
• Internal solution reservoir – the 120 litre reservoir has enough capacity for running most tests for 7 days or more
• Remarkably simple user interface
• Rapid chamber temperature cycling – unique internal chamber heater and cooling/dry-off blower exceptionally fast temperature changes

Accessories

• Shower module with self-cleaning nozzles – for uniform spray throughout the chamber, in accordance with many automotive test standards
• Specimen holders – test panel racks, a hanging rod kit and a specimen mounting grate are available as options
• Start-Up Salt Kit – allows for compatibility with ASTM B117
• Q-PANEL corrosion coupons

Models

• Q-FOG CRH600-HSC: conventional salt fog and Prohesion tests, humidity control, shower module, 640 litre chamber volume
• Q-FOG CRH1100-HSC: conventional salt fog and Prohesion tests, humidity control, shower module, 1103 litre chamber volume

More information

Product brochure: Q-FOG Cyclic Corrosion Testers

Partial List of Test Methods & Standards Met by Q-FOG Cyclic Corrosion Testers