Hyundai/Kia CCT-A
An accelerated corrosion test under complex environment shall be performed in accordance with CCT-A of MS600-66
Step 1: Salt Spray @ 35C / 95% RH for 5 hours
Step 2: Drying @ 70C / 30%RH for 7 hours
Step 3: Wetting @ 50C / 95%RH for 3 hours
Step 4: Drying @ 60C / 30%RH for 2 hours
Transition times:
From step 1 to step 2 = 20 minutes
From step 2 to step 3 = 15 minutes
From step 3 to step 4 = 10 minutes
From step 4 to step 1 = 15 minutes
The entire cycle is 12 hours and repeatable
The VW Volkswagon PV 1200 Test Specification describes an environmental cycle test (elevated temperature/low temperature cycle) for testing units, e.g. vehicle parts in the engine compartment.
The behaviour of the units and/or parts during environmental cycle stressing by means of cycling temperature and moisture shall be assessed here (e.g. susceptibility to cracks, deformation, separation of the composite material, etc.).
The purpose of the test specifications (e.g. temperature -40 °C) is to uncover component weaknesses in a short-term test with accelerated time effect, not to define general component requirements for continuous operation. This is a VW Volkswagon / Audi Test Standard. Also see PV 1209 % PV 1210.
Paints & varnishes – determination of resistance to cyclic corrosion conditions, Part 1: wet(salt fog)/dry/humidity
This test method has been found to be useful for comparing the relative resistance to corrosion of paints, varnishes and similar materials, when exposed to a simulated aggressive outdoor environment, such as a marine environment. It is cyclic in nature, i.e.; test specimens are exposed to changing climates over time.
Cycle D is based upon the requirements of JIS K 5621 – 2003 test specimens are placed in an enclosed chamber and exposed to a changing climate that comprises of the following repeating cycle. 30 Minutes of salt spray @ 30C (+/-2C) followed by wetting for 90 minutes @ 30C (+/-2C) & 95%RH (+/-3%), followed by drying @ 50C (+/-2C) for 120 minutes, and drying @ 30c (+-/2C) for 120 minutes. The following transition times apply
- 10 minutes from salt spray to wetting
- 15 minutes from wetting to hot drying
- 30 minutes from hot drying to warm drying
- instantaneous from warm drying to salt spray
Total cycle time is 6 hours, unless otherwise agreed Cycle D repeats for 28 cycles (168h)
Chamber volumes of less than 400 Litres are not permitted by this test standard.
These tests are also referred to as a Cyclic Corrosion Tests, often abbreviated to CCT.
For further information on ISO standards visit; www.iso.org
Note; many ISO test standards have been harmonized with other European standards and these are now prefixed ‘EN’ (Euro Norm) or ‘** EN’ – where ** are the letters representing a European country/language code, for example ‘BS EN’ for a harmonized British standard in English language.
RNES-G-00006
This is a Renault accelerated laboratory corrosion test method that can be used to determine the corrosion resistance of automotive assemblies and components. It 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. 4.0 hours exposure to a continuous indirect spray of salt water solution, which falls-out on to the specimens at a rate of 1.0 to 2.0ml/80cm²/hour, in a chamber temperature of +35°C. This is followed by 2.0 hours of air drying in a climate of 20 to 30%RH at +60°C. This is followed by 2.0 hours exposure to a moistening (controlled humidity) climate of 92-98%RH at +50°C. The number of cycle repeats and therefore the test duration is variable.
The maximum transition times between each part of the test cycle are also specified as follows:
From salt spraying to air drying within 30 minutes.
From air drying to moistening within 30 minutes.
From wetting to salt spraying within 30 minutes.
RNES-G-00005-ECC-1
This is an accelerated laboratory corrosion test method that can be used to determine the corrosion resistance of automotive assemblies and components. 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 pollution by chloride ions and exposure to hot/humid and hot/dry atmospheres. The entire test cycle comprises of a main cycle and a sub-cycle. 1 entire test cycle takes 24 hours to execute. The number of entire cycle repeats and therefore the test duration is variable.
The main test cycle begins with 30 minutes of salt spray (pollution) during which a continuous indirect spray of acidic (pH 4.0) salt water solution, falls-out on to the specimens at a rate of 4.0 to 6.0ml/80cm²/hour, in a chamber temperature of +35°C. This is followed by 5 minutes of air flushing (purging). This is followed by 5 minutes of wall rinsing, during which the chamber walls are rinsed with deionized water. This is followed by another 5 minutes of air flushing. This is followed by 1 hour 40 minutes of drying in a climate of 20%RH at +35°C with the transition from ~100%RH to 20%RH being linear over 1 hour 30 minutes . This is followed by 1 hour 35 minutes of drying in a climate of 55%RH at +35°C.
This is then followed by a repetitive sub-cycle comprising of 1 hour 20 minutes exposure to a humid climate of 90%RH at +35°C, followed by 2 hours 40 minutes of drying in a climate of 55%RH at +35°C. This sub-cycle is repeated 5 times in total, before the main test cycle starts again.
This Renault test is also referred to as an Essai de Corrosion Cyclique, often abbreviated to ECC-1.
This is an accelerated laboratory corrosion test method that can be used to determine the corrosion resistance of automotive assemblies and components. It 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 a relatively short period of salt spray, followed by exposure to hot/humid and hot/dry atmospheres. The entire test cycle comprises of a main cycle and a sub-cycle. 1 entire test cycle takes 24 hours to execute. The number of entire cycle repeats and therefore the test duration is variable.
The main test cycle begins with 10 minutes exposure to a continuous indirect spray of salt water solution, in a chamber temperature of +50°C. This is followed by 155 minutes of air drying at +60°C. This is followed by 75 minutes exposure to a high humidity climate of 95%RH at +60°C.
This is then followed by a repetitive sub-cycle comprising of 160 minutes of exposure to an air drying at +60°C, followed by 80 minutes exposure to a humid climate of 95%RH at +60°C. This sub-cycle is repeated 5 times in total and then the chamber is conditioned to +50°Cfor up to 10minutes before the main test cycle starts again.
IEC 60068-2-52
Test specimens are placed in an enclosed chamber (a separate salt mist chamber and controlled humidity chamber are generally used) and exposed to a changing climate that starts with 2 hours exposure to a continuous indirect spray of neutral (pH 6.5 to 7.2) salt water solution, which falls-out on to the specimens at a rate of 1.0 to 2.0ml/80cm²/hour, in a chamber temperature of +15 to +35°C. Depending upon method number, this is followed either by exposure to a high humidity climate of 40°C / 93%RH; or air drying at 60 °C, under 30 % RH and then Wetting at 50°C.
The proven test methodolgy can be downloaded here
The duration of high humidity and number of cycle repeats is variable depending on the test method (1-8).
Test method 1
One cycle consists of spraying samples with salt solution at 35 °C for 2h, followed by controlled humidity at 40 °C, 93% RH for six days and 22 h. The required number of cycles is four (28 days).
Test method 2
One cycle consists of spraying samples with salt solution at 35 °C for 2h, followed by controlled humidity at 40 °C, 93% RH for 22h. The required number of cycles is three (3 days).
Test method 3
One cycle consists of spraying samples with a salt solution at 35 °C for 2h, followed by controlled humidity at 40 °C, 93% RH for 22h. This shall be repeated four times. The test specimens shall then be stored under standard atmosphere at 23 °C and 50 % RH for three days. The required number of cycles is one (seven days).
Test method 4
The required number of cycles as specified in test method 3 shall be two (14 days).
Test method 5
The required number of cycles as specified in test method 3 shall be four (28 days).
Test method 6
The required number of cycles as specified in test method 3 shall be eight (56 days).
Click here For information on test methods 7 & 8
ISO 60068-2-52
Test specimens are placed in an enclosed chamber (a separate salt mist chamber and controlled humidity chamber are generally used) and exposed to a changing climate that starts with 2 hours exposure to a continuous indirect spray of neutral (pH 6.5 to 7.2) salt water solution, which falls-out on to the specimens at a rate of 1.0 to 2.0ml/80cm²/hour, in a chamber temperature of +15 to +35°C. Depending upon method number, this is followed either by exposure to a high humidity climate of 40°, C93%RH; or air drying at 60 °C, under 30 % RH and then Wetting at 50°C.
The duration of high humidity and number of cycle repeats is variable depending on the test method (1-8).
Test method 7
One cycle is 8 h. One cycle shall consist of spraying the specimen with salt solution at 35 °C for 2 h, followed by the dry condition at 60 °C, under 30 % RH for 4 h and then the humid condition at 50 °C, over 95 % RH for 2 h.
The transition times (time allowed to reach the temperature and relative humidity specified for a condition after changing to that condition) for temperature and humidity shall be specified between the following choices and reported: – salt mist to dry condition: within 30 min or between 30 min and 60 min; – dry condition to humid condition: within 15 min or between 15 min and 30 min; – humid condition to salt mist: within 30 min. Those transition times shall be included in the next condition period of the pair, for example the salt mist to dry condition transition time is included in the period of the dry condition. Spraying the specimen with a salt solution begins instantaneously once the salt mist is started.
The recommended number of cycles are 3 (1 day), 6 (2 days), 12 (4 days), 30 (10 days), 45 (15 days), 60 (20 days), 90 (30 days), 150 (50 days) and 180 (60 days).
Test method 8
One cycle is 8 h, as specified in test method 7 using acidified salt solution instead of neutral salt solution.
The recommended number of cycles is the same as in test method 7
Cosmetic Corrosion Lab Test
The SAE J 2334 Method B procedure has been field correlated, so it is claimed that the results obtained should correlate well to those obtained due to natural exposure, under severe corrosive conditions. It can therefore be used as a validation and development tool for automotive paint systems. This test is cyclic in nature, i.e.; test specimens are exposed to changing climates over time.
SAE J 2334 has three methods of achieving the standard, this page is describes the procedure described in Method B.
The test specimens are placed in an enclosed cyclic corrosion chamber and exposed to a changing climate that comprises of the following 3 part repeating cycle:
- 6.0 hours exposure to a water fog/condensing humidity climate of 100%RH at +50C.
- followed by 15 minutes or a direct spray of salt water at ambient temperature to thoroughly wet the test samples
- followed by 17 hours 45 minutes of air drying in a climate of 50%RH at +60C.
The number of cycle repeats and therefore the test duration is variable.
This test is also referred to as a Cyclic Corrosion Test, which is often abbreviated to CCT, further information on our Cyclic Corrosion Test Chambers and how they work can be found here
For further information on SAE standard please visit; www.saej2334.com
For further information on SAE J 2334
Please contact Ascott Analytical via our contact us page or call our experiences technicians on 01827 318044
Cosmetic Corrosion Lab Test
SAE J 2334 Method A has been field correlated by comparisons between laboratory test results and corrosion in real world applications. It is claimed that the results obtained should correlate well to those obtained due to natural exposure, under severe corrosive conditions.
It can therefore be used as a validation and development tool for automotive paint systems. 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.
6.0 hours exposure to a water fog/condensing humidity climate of 100%RH at +50C. This is followed by 15 minutes immersion in (or a direct spray of) salt water at ambient temperature.
This is followed by 17 hours 45 minutes of air drying in a climate of 50%RH at +60C. The number of cycle repeats and therefore the test duration is variable.
This method is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT.
For further information on SAE standards visit; www.sae.j2334.com
Further information on SAE J 2334 Method A
For Further info please contact Ascott Analytical via our contact page.
