Cyclic Corrosion Testers - Q-Lab
Contents
1. Humid Function Model CCT Only During the Humid Function in CCT models the chamber is maintained at 95 100 relative humidity by forcing hot water vapor into the chamber Deionized water is required for proper operation The vapor generator heater maintains the programmed chamber temperature Q FOG model CRH testers utilize the RH Function in place of the Humid Function shower Function Optional for Model CRH Only The Shower Function is used for some automotive test spec ifications A user adjustable volume of solution is uniformly sprayed onto specimens through specially positioned nozzles e Nozzles are mounted to a spray bar which can be easily removed when using the Fog Function e Spray droplets are much bigger flow rates are much higher and shower times are much short Shower Module er than the atomized solution mist in the Fog alae Function e Shower on off times can be directly programmed to allow for excellent control of corrosion rates RH Function Model CRH Only In CRH models the chamber can ramp to and maintain a defined RH value and temperature through the use of the air pre con ditioner the blower module and special atomizing humidification nozzles DI water is required for proper operation Also see operating manual for details on RH temperature capabilities vs laboratory condition requirements __Humidification a A Air Pre Conditioner Compressed2. Conditioned Air www q lab com 11 Operation Q FOG cyclic corrosion chambers are extremely simple to operate Specimen mount ing and evaluations are simplified with several specially designed specimen holder options Programming is intuitive All models are completely automated and can operate contin uously 24 hours per day 7 days per week specimen Mounting Q FOG chambers have a low belt line and an easy opening lid for more conve nient sample mounting Standard rack panel holders are avail able to accommodate a variety of flat specimen panel sizes They are slotted at a 15 degree angle Hanging rods allow convenient mount ing of small three dimensional parts and other odd shaped test specimens Diffuser level or rack level specimen mounting grates can accommodate very large parts up to 544 kg 1200 pounds in total weight 12 www q lab com Programming Designed to be both functional and easy to use the Q FOG controller can be programmed in five user selectable languages English French Spanish Italian or German Users can program and store up to 10 tests in memory which has a battery back up feature standards Q FOG with most major standards including Prohesion ASTM B117 GMW 14872 SAE J2334 and others from Ford ISO GB VW Volvo Chrysler Renault etc several standards come factory pre pro chambers are compatible grammed for convenience Q FOG c
3. Cyclic Corrosion Testers We make corrosion testing simple Q LAB Corrosion Basics Corrosion causes billions of dollars in product and infrastructure damage every year It degrades the useful properties of materials especially metals This can include loss of strength appearance and permeability to liquids and gases In just a few days or weeks a Q FOG tester can reproduce the damage that occurs over months or years outdoors Cyclic Corrosion Testers Cyclic corrosion testing provides the best possible laboratory simulation of natu ral corrosion Current research indicates that cyclic corrosion testing results are similar to outdoors in resulting structure morphology and relative corrosion rates Prior to cyclic testing conventional salt spray a continuous salt spray at 35 C was the standard way to simulate corro sion ina lab Because conventional salt spray methods failed to mimic the natural wet dry cycles of outdoors test results frequently provided poor correlation to outdoors 2 www q lab com In a Q FOG cyclic corrosion tester spec imens are exposed to a series of different environments in a repetitive cycle that mimics outdoors Simple cycles such as Prohesion may consist of cycling between salt fog and dry conditions More sophis ticated automotive methods may call for multi step cycles that incorporate humid ity along with salt spray and dry off Within one Q FOG chamb
4. low thermal conductivity for effi cient precise temperature control Heat resistant plastic allow testing at higher temperatures than competitive cabinets Rapid Chamber Temperature Cycling Q FOG testers can change tempera tures exceptionally fast because of their unique internal chamber heater and _ cooling dry off blower An additional air heater allows very low humidity dry off exposures Conventional water jacket chambers cannot produce low humidity or cycle rapidly See page 10 shower Module with Self Cleaning Nozzles The Q FOG model CRH adds an optional shower module for uniform spray throughout the chamber in accordance with many automotive test standards Quick disconnect spray nozzles have an innovative self clean ing feature to prevent precipitate clogging often found in competitive test chambers See page 11 Relative Humidity Control The Q FOG model CRH features pre cise control of relative humidity through the use of an air preconditioner see right for compatibility with most major automotive cyclic corrosion standards Most temperature controlled laborato ries can be accommodated with this innovation More on page 11 Q FOG testers arent loaded with unnecessary features just the ones you need www q lab com T Corrosion Testing amp Standards Cyclic corrosion tests expose specimens to a series of different environments in a repetitive cycle Simple tests may consist of cycling be
5. G CRH for Research and Cyclic Automotive Tests with Variable Relative Humidity Control The Q FOG model CRH represents a true breakthrough in the price performance ratio of corrosion testers with RH control It has all the advantages of the model CCT but adds full variable humidity control through the use of an innovative air pre conditioner It is compatible with most major automotive corrosion test standards such as GMW 14872 SAE J2334 and others from Ford ISO GB T VW Volvo Chrysler Renault etc Additionally this model includes an optional programmable shower function with an advanced cleaning feature for spray nozzles that prevents clogging frequently found in competitive chambers www q lab com 5 Key Features Two Convenient Sizes for Each Model All Q FOG models SSP CCT and CRH are available in two convenient chambers sizes 600 and 1100 liters to accommodate small and large specimen quantities Caster wheel kits are available to allow for easy repositioning of the tester in laborato ries with tight space requirements Internal Solution Reservoir Space utilization is maximized and maintenance is minimized with the Q FOG machine s internal solution reservoir The 120 liter reservoir has enough capacity for running most tests for 7 days or more The reservoir has an integral salt filter and a built in alarm to alert the operator when the solution is low Precise Control of Fog Dispersion The Q FOG
6. clic corrosion tester can give more realistic results than either conventional salt soray or CCT or CRH alone See ASTM D5894 for more information Alternating QUV exposure and Q FOG cyclic corrosion testing can improve correlation for some materials www q lab com 9 Cyclic Corrosion Testers How They Work Fog Function All Models During the Fog Function the corrosion tester typically operates as a conven tional salt spray unit e Corrosive solution from the internal reservoir is pumped to the nozzle e Compressed air is humidified by passing through the bubble tower on its way to the nozzle Nozzle atomizes solution air into a fine corrosive fog mist e Chamber heaters maintain the pro grammed chamber temperature Lid Controller Solution Reservoir Compressed ir In g Chambe a e o solution To Pump Dry Off amp Dwell Functions Models SSP amp CCT During the Dry off Function a purge blower forces room air over an air heater through diffusers and across speci mens in the chamber This creates a low humidity condition inside the chamber drying the specimens The chamber temperature is controlled by the cham ber heaters and the air heater During the Dwell Function not shown the chamber temperature is controlled by only the chamber heater Q FOG model CRH testers utilize the RH Function in place of the Dry Off and Dwell Functions 10 www q lab com
7. er it is possible to cycle through all of the most significant corrosion environments Even the most complex test cycles can easily be pro yy V grammed with the easy to operate Q FOG controller Q FOG chambers are available in three types The base model SSP performs traditional salt spray and Prohesion tests Model CCT performs salt spray Prohesion and most cyclic automotive tests Model CRH adds variable relative humidity control and an optional shower function All Q FOG chambers are avail able in two sizes to fulfill a range of testing requirements LULLA simple to Afford Q FOG corrosion testers were specifi cally designed to have the lowest total cost of ownership in the industry Their low purchase price high reliability and low operating costs set a new stan dard for corrosion testers And the new model CRH represents a breakthrough in price performance for RH controlled cor rosion chambers Now even the smallest lab can afford cyclic corrosion testing Why Q FOG simple to Use Q FOG cyclic corrosion testers are easy to install easy to program and easy to operate Specimen mounting and eval uations are simplified with a low belt line and easy opening lid All models are completely automated and can operate continuously 24 hours per day 7 days per week without supervision The testers are smart enough to alert you to issues they ma
8. hambers are designed to be extremely low maintenance and user service able They are equipped with a number of on board sensors to monitor and control the environment inside the chamber Periodic cal iobrations and preventive maintenance items are made easy through thoughtful design Calibration The Q FOG tester s chamber tempera ture sensor and RH sensor in CRH models should be calibrated by the user every six months to ensure accurate and consistent results Calibrating the temperature and RH sen sors takes only afew minutes It requires simple tools a calibrated reference ther mometer and an insulated container Preventive Maintenance Q FOG chambers are equipped with a routine service timer Every 1000 hours of operation a convenient reminder message Perform Routine Service is displayed During this routine preventive main tenance the bubble tower used to saturate the compressed air for atomiz ing the salt solution should be drained and refilled Air and water filters should be cleaned at this time It is also rec ommended to clean and wash down the chamber walls and heater Once per year filters and peristaltic pump tubing are replaced which takes only a few minutes Calibration amp Maintenance serviceability Direct access to key maintenance or repair items is possible with a remov able side access panel The layout and position of all components in a Q FOG tester were pa
9. instakingly designed to allow easy access for inspection and maintenance Troubleshooting The Q FOG controller features complete self diagnostics including warning mes sages and automatic safety shut down An easy to understand users manual allows most troubleshooting to occur even with novice users www q lab com 13 Test Panel Racks Standard test panel racks are avail able to accommodate flat specimens such as Q PANEL standard sub strates Racks can support up to 113 kg 250 pounds each and are slotted at 15 degrees trom vertical The 600 liter Q FOG models can accommodate up to 160 specimens 75 x 150 mm 3 x 6 in in size through 8 racks The 1100 liter models can hold up to 240 specimens using 10 racks Hanging Rod Kit A standard hanging rod kit is available for small three dimensional and odd shaped specimens Each of the 20 mm 3 4 in diameter rods can support up to 45 kg 100 pounds and can be easily installed The kit contains 6 rods for a 600 liter Q FOG model and 8 rods for an 1100 liter version Simple hooks or wire ties may be used to mount samples Accessories amp Options specimen Holders Mounting Grate For extremely large or heavy three dimensional objects such as metal wheel rims engine parts etc a rack level or diffusion level specimen mounting grate may be used The Q FOG tester s sturdy construction can support a well distridbuted total load of up to 544
10. kg 1200 pounds ensuring compatibility with even the heaviest of automotive and other components otart Up Salt Kit A convenient salt kit is available con taining a pre measured and certified quantity of NaCl 530 g which allows for compatibility with ASTM B117 Just add the recommended amount of water to obtain a 5 solution Shower Module some automotive industry standards e g GMW 14872 require not just a fine mist salt fog but a uniform salt solution shower The Q FOG CRH model features a Standard shower module and anti clog nozzles for full compatibility with these test methods Adjustable RH Control Fully adjustable relative humidity control is required by many cyclic automotive test standards such as GMW 14872 SAE J2334 and others The Q FOG model CRH utilizes an innovative air ore conditioner to accomplish precise RH control in most lab environments 14 www qg lab com Summary Standard Optional Feature SS Two model sizes available 600 and 1100 liter Performs Prohesion and other Fog Dry Off cycles Performs conventional continuous salt fog Performs cyclic automotive tests requiring 95 100 humidity Remarkably simple user interface for easy programming Five user selectable languages English French Spanish German or Italian Our Other Products and Services QUV pihl Q SUN Q PANEL Q LAB Q TRAC Accelerated Xenon Standard Outdoor Sunlight Weathering Tester
11. s Test Chambers Test Substrates Exposure Testing Concentrator Testing P CCT CRH ACCREDITED 0859 01 amp 0859 03 Q LAB Q RACK Laboratory Outdoor Contract Testing Exposure Racks www q lab com 15 Our Global Network Q Lab headquarters are located in Westlake Ohio USA with sales and distribution facilities located in England Germany and China Our A2LA accredited laboratory facilities are located in Germany Florida and Arizona We also maintain outdoor expo sure facilities in Florida Arizona and Ohio We support our customers through direct salespersons and distributors in over 60 countries across 6 continents Q Lab Corporation Q LAB Q Lab Headquarters Westlake OH USA Tel 1 440 835 8700 info q lab com Q Lab Florida Homestead FL USA Tel 1 305 245 5600 q lab q lab com Prohesion is an exclusive trademark of Croda Mebon Ltd All Q FOG chambers are CE marked Q Lab Europe Ltd Bolton England Tel 44 1204 861616 info eu q lab com Q Lab Arizona Buckeye AZ USA Tel 1 623 386 5140 q lab q lab com www q lab com Q Lab Deutschland GmbH Saarbr cken Germany Tel 49 681 857470 vertrieob q lab com Q Lab China PEI R 4t Shanghai China E4 FIG 86 21 5879 7970 info cn q lab com LF 8101 5 2014 Q Lab Corporation All Rights Reserved Q Lab the Q Lab logo Q SUN QUV Q FOG Q PANEL Q TRAC and Q RACK are registered trademarks of Q Lab Corporation
12. tester has superior fog dispersion compared to conventional systems which cannot vary volume and distance independently A vari able speed peristaltic pump controls the amount of corrosive solution deliv ered to the spray atomizer while the air pressure regulator controls the dis tance of the throw See page 10 6 www q lab com Easy Sample Q Mounting The Q FOG chamber has a low belt line and an easy opening lid for easier access during sample mounting Test panel racks hanging rod kits and flat grates are available to conveniently mount specimens of all shapes sizes and weights up to a maximum of 544 kg 1200 pounds Remarkably Simple User Interface The Q FOG testers user interface is designed to be functional highly reliable and easy to use The controller allows for complete seltf di agnostic error checking and can be programmed in 5 user selectable lan guages English German Spanish French and Italian Easy Operation amp Maintenance All components in a Q FOG tester are positioned to allow easy access for calibration inspection and routine preventive maintenance Sub systems are modular for easy repair The Q FOG controller features complete self diagnostics including descrip tive warning messages and automatic safety shut down See pages 12 13 9 Reinforced Fiberglass Construction Q FOG testers are made of solid fiber reinforced plastic The robust heavy walled chamber and lid have
13. tween two conditions fog and dry More sophisticated procedures especially for automotive testing call for multi step cycles incorporating humidity along with salt fog or shower functions and dry off 8 www q lab com Prohesion and Conventional Salt Spray Numerous accelerated corrosion tests may be performed in Q FOG model SSP including Prohesion ASTM B117 ASTM G85 BS 3900 F4 and F9 DIN 50 021 ISO 9227 and GB T 10125 just to name a few Prohesion This test uses one hour fog and one hour dry off rapid tempera ture changes and a different corrosive solution to provide a more realistic test Many researchers have found this test useful for industrial maintenance coatings Conventional Salt Spray Continuous salt spray exposures are widely specified for testing components and coatings for corrosion resistance Applications include plated and painted finishes aerospace and military components and electrical and electronic systems Most of these tests are performed to particular specifications such as ASTM B117 Salt Spray and BS 3900 F4 These tests are widely used for relative corrosion test ing They are typically run at an elevated temperature and do not incorporate a dry oft cycle They require heated humidified air for the spray Cyclic Corrosion Tests A more serious limitation of tests such as ASTM B117 is that they provide a continu ous environment with no changes in conditions In contrast materials e
14. xposed to the weather experience cyclical changes in wetness temperature sunlight and corrosive solution concentration Corrosion in a cycling environment can be very different from corrosion in a continuous cycle in terms of both the chemical reactions and the type of materials that will best resist corrosion As such many automotive corrosion test methods typically call for exposing speci mens to a repetitive cycle of salt spray high humidity low humidity dry off and ambient conditions These test methods were originally developed as labor intensive manual orocedures More recent cyclic automotive test methods such as GMW 14872 incor porate controlled relative humidity conditions which is often challenging to obtain in many lab conditions These test methods sometimes call for a shower rain step with higher flow than typical fine mist salt fog Ramp times are also often tightly controlled Cyclic Corrosion Tests with UV Exposure The QUV accelerated weathering tester and Q FOG cyclic corro sion testers have outstanding advantages on their own But when used together they are revolutionizing corrosion testing par ticularly for industrial maintenance paints on bridges and other infrastructure applications Ultraviolet light stability of a coating can be a major factor in its corrosion resistance Research indicates that a corrosion cycle alternating between one week in a QUV accelerated weathering tester and one week in a cy
15. y encounter during testing simple to Maintain We believe that just because a product is technical it doesnt have to be hard to understand or difficult to maintain and repair Instead of complicating our tester designs by loading them with extra or unnecessary features we put our engi neering effort into keeping things simple subsystems are modular easy to trouble shoot and easy to replace This makes typical maintenance and repair of Q FOG testers simple enough that it doesnt require a field technician but we re here if you need us Every feature of a Q FOG tester was designed with simplicity and reliability in mind www q lab com 3 Q FOG Models O OG Sar for Prohesion or Conventional Salt Spray Numerous accelerated corrosion tests may be performed in the Q FOG base model SSP including Prohesion ASTM Eli ASITMG25 Bo 3900 FA oro DIN 50 021 1909227 GB T 10125 and many others The SSP chamber is our most economical model and can perform salt fog dwell and dry off functions www q lab com Q FOG CCT for Research and Cyclic Automotive Tests with 100 Humidity The Q FOG model CCT has all the advan tages of the model SSP but adds the flexibility of including 100 humidity This is another critical exposure condition to many cyclic corrosion tests CCT units come equipped with a viewing window in the side of the lid and an internal light to allow easy monitoring of test conditions Q FO
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