Toyota Laboratory Accelerated Cyclic Corrosion Test
This test procedure serves as a general purpose atmospheric corrosion test and can be applied to a wide variety of materials, coatings and interactions of materials.
It has been developed to allow the evaluation of the corrosion resistance of metals used in vehicle bodies where there is a significant influence of chloride ions, mainly as sodium chloride from winter road de-icing salt. This test is cyclic in nature, i.e.; test specimens are exposed to changing climates over time.
Test specimens are placed in an enclosed chamber and exposed to a changing climate.
Method C comprises the following 24 hour profile
- 4 hours saltwater spraying @ 50°C
- 5 hours forced drying @ 70°C / <30%RH
- 12 hours wetting @ 50°C / 85-90%RH
- 2 hours forced drying @ 70°C / <30%RH and
- 1 hour natural drying in ambient conditions
The number of cycle repeats and therefore the test duration is variable.
The test allows for 30 mins transition time between each of the above steps and is commonly referred to as Toyota CCT-C
Jaguar Land Rover Laboratory Accelerated Cyclic Corrosion Test
TPJLR.52.265 is a Cyclic Corrosion Test Standard from JLR that applies to components, assemblies and sub-assemblies used in all JLR vehicles where the corrosion resistance (cosmetic or perforation) of metals and interacting materials needs to be evaluated.
TPJLR.52.265 has been developed to allow the evaluation of the corrosion resistance of metals in environments where there is a significant influence of chloride ions, mainly as sodium chloride from a marine source or by winter road de-icing salt. This test is cyclic in nature, i.e.; test specimens are exposed to changing climates over time.
Test specimens to be evaluated are placed in an enclosed chamber and exposed to a changing climate. The 24 hour test cycle consists of a 6 hour wet phase at 25 °C ±2 °C with intermittent salt spray, a two-step transition phase with drying under climate control (2.5 hours) and a 15.5 hour phase at constant temperature and humidity (50 °C ±1 °C, 70% ±3% RH).
The 24 hour profile is then repeated for the specified number of cycles.
Ref: JLR Corrosion Test, Jaguar Corrosion Test, TPJLR52265, JLR52265, TPJLR-52-265
This test is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT.
This information was correct at time of writing and may have since varied.
Ascott Analytical provides a wide range of different sized equipment to fulfil this standard that will also fulfil many other standards using the same equipment. Further accessories can be added to widen this scope of test standards the equipment can be used to achieve as well of a range of jogs and fixtures for holding your materials during testing. Data Logging software applications and other useful testing tools are also an option.
For further Information:
Please contact Ascott Analytical via our contact page
Hyundai/Kia CCT-B
An accelerated corrosion test under complex environment shall be performed in accordance with CCT-B of MS600-66
Step 1: Salt Spray @ 35C / 95% RH for 4 hours
Step 2: Drying @ 70C / 30%RH for 2 hours
Step 3: Wetting @ 50C / 95%RH for 2 hours
Step 4: Ambient Drying @ 25C / 60%RH for 1.5 hours
Step 5: Cooling @ -20C for 2.5 Hours
Transition times:
From step 1 to step 2 = 30 minutes
From step 2 to step 3 = 20 minutes
From step 3 to step 4 = 20 minutes
From step 4 to step 5 = 60 minutes
From step 5 to step 1 = 20 minutes
The entire cycle is 12 hours and repeatable
Determination of the resistance of organic coatings to the propagation of bubble under skin corrosion
Fiat 50493
also known as SCAB indoor corrosion test
1 hour humidity test at 55°C / 95% RH
Followed by 40 minutes of temperature controlled air drying @ 55°C / 55-60% RH
The air drying stage needs to be reached within 20 minutes
Scania Laboratory Accelerated Cyclic Corrosion Test
This test procedure serves as a general purpose atmospheric corrosion test and can be applied to a wide variety of materials, coatings and interactions of materials. It has been developed to allow the evaluation of the corrosion resistance of metals in environments where there is a significant influence of chloride ions, mainly as sodium chloride from a marine source or by winter road de-icing salt. This test is cyclic in nature, i.e. test specimens are exposed to changing climates over time.
Test specimens are placed in an enclosed chamber and exposed to a changing climate. The first 5 days comprise of the following 3 part repeating cycle. 6.0 hours exposure to a ‘wet’ climate of no less than 95% RH, at +25°C, with intermittent exposure to salt solution.
This is followed by 2.5 hours climate controlled transition to 50°C & 70% RH. This is followed by 15.5 hours exposure to a constant climate of 50°C & 70% RH.
The final 2 days comprise of 48.0 hours exposure to a constant climate of 50°C & 70% RH. This completes the total 7 day test cycle. The number of cycle repeats and therefore the test duration is variable.
This test is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT, and is based on Volvo 423-0014.
Standard Climates
This standard specifies 3 standard climates for ambient air in terms of temperature, relative humidity, dewpoint temperature, pressure and air speed. These 3 climates are referred to by their temperature and relative humidity only, using the following abbreviations:
23/50 = +23C & 50%RH
20/65 = +20C & 65%RH
27/65 = +27C & 65%RH
In addition, each of these climates can have 1 of 3 different tolerances for the maximum deviation of temperature and humidity, using the following class numbers:
0.5 = +/-0.5C & +/-1.5%RH
1 = +/-1.0C & +/-3.0%RH
2 = +/-2.0C & +/-6.0%RH
The above abbreviations and class numbers appear after the main standard number as a suffix. So, for example, the full DIN reference for a standard climate of +23C +/- 1.0C & 50%RH +/-3.0%RH is DIN 50 014-23/50-1.
For further information on DIN standards visit; www.din.de
Testing of Corrosion Protection of Vehicle Paint by Alternating Cycles Test
This test procedure has been developed to judge the corrosion protection of vehicle paint using an accelerated laboratory test. It is claimed that testing according to this procedure can generate results that correlate well with those seen by driven vehicles. This test is cyclic in nature, i.e.; test specimens are exposed to changing climates over time.
Test specimens are placed in an enclosed chamber and exposed to a changing climate that comprises of the following 3 part repeating cycle. 24.0 hours exposure to salt spray according to DIN 50 021-SS. This is followed by 96.0 hours exposure to a condensing water climate according to DIN 50 017-KFW. This is followed by 48.0 hours exposure to an ambient climate of +18 to +28C according to DIN 50 014. The number of cycle repeats and therefore the test duration is variable.
Please see elsewhere in this document for details of DIN 50 021-SS, DIN 50 017-KFW & DIN 50 014.
This test is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT.
For further information on VDA standards visit; www. vda.de
Cyclic corrosion testing of materials & components in automotive construction.
The purpose of this test is to provide an accelerated test procedure for the assessment of the corrosion behaviour of components and of the corrosion protection provided by coating systems. The test method is based on real corrosive conditions and delivers differentiated results for a large number of uses in automotive applications
Test specimens are placed in an enclosed chamber, and positioned at an angle of 65° to 75° to the horizontal with the side to be tested uppermost. The salt spray phase is performed with a 1% solution of sodium chloride, (pH 6.5 to 7.1) and falls out onto the specimens at a rate of 2.0 to 4.0ml/80cm²/hour.
A full test cycle lasts 7 days and consists of:
Cycles A,B & C are multi step cycles consisting of varying degrees of temperature from -15°C to +50°C and humidity values of between 50% and 95%.
The typical test duration is six full test cycles. (6 Weeks)
Volvo accelerated corrosion test
Volvo also Refer to this test as ACT -1.
This standard defines an accelerated corrosion test method to be used in assessing the corrosion resistance of metals in environments where there is a significant influence of chloride ions, mainly as sodium chloride from a marine source or by winter road de-icing salt. It specifies a test procedure to be used in conducting the accelerated corrosion test to simulate atmospheric corrosion conditions in a controlled way.
The one-week main test cycle is composed of two twelve-hour sub-cycles, one with controlled humidity cycling; sub-cycle 1, the other including salt solution application, sub-cycle 2.
Sub cycle 1 requires constant conditions at 35°C & 95% RH for 4 h, followed by an increase of temperature to 45°C whilst reducing the humidity to 50% over a 2 hour period. This is followed by constant conditions of 45°C & 50% RH for 4 h, together with a 2 hour period of 35°C & 95%RH. Step 1:4) Temperature decrease from 45°C to 35°C.
Sub cycle 2 requires spraying with salt solution for 15 mins then keeping the samples at 35°C for 1 h 45 min whilst maintaining a set point of 95% – 99% RH in such a way that the test objects remain wet. These steps are repeated in sequence to give a total period of 6 hours. Drying at 45°C & 50% RH for a 2 hour period followed by a further 2 hour period of 35°C whilst maintaining 95% RH.
This test is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT.
For further information on Volvo STD standards visit; volvogroup.com/suppliers
