Long-term testing in humid environments

FOGGING TEST IN THE
AUTOMOBILE INTERIOR

The fogging test is an essential test for materials used in vehicle interiors. It ensures that your components do not release unwanted volatile substances that could deposit on windows or other surfaces. The fogging test is an essential test for determining the outgassing of volatile organic compounds (VOCs) from materials in the vehicle interior. It ensures that emissions, which can appear as a haze or fogging on cold surfaces such as windscreens, are minimized to ensure driver visibility and safety. These deposits can not only impair visibility, but also reduce the perceived quality and comfort in the vehicle.

LONG-TERM TESTING FOR MAXIMUM RELIABILITY

Long-term tests in humid environments are an indispensable part of vehicle development. They guarantee that cars function reliably even under extreme conditions. As a testing service provider, we strive to provide our customers with valuable insights through comprehensive testing and analysis to help improve product quality and safety. By complying with established standards such as ISO 16750, SAE J1455 and DIN 50017, we ensure that our tests meet the highest standards.

Outdoor weathering is a common procedure in which vehicles or components are exposed to natural weather conditions over an extended period of time .

In our tests, we focus on several key aspects.

Conditioning

The samples are conditioned in a controlled environment to ensure that they are exposed to specific conditions such as temperature and humidity.

Exposure to water

Vehicles are exposed to various sources of water, such as spray mist or rain. This enables the evaluation of seals, paintwork and electronic components in accordance with the requirements of DIN 50017.

Long-term observations

The tests extend over several months in order to take seasonal changes into account. Visual inspections and metrological analyses are carried out regularly to detect changes in material behavior and possible corrosion damage.

Data analysis

The collected data is analyzed to identify trends and patterns. This helps to evaluate the performance of the materials and systems over time.

CONTACT OUR EXPERTS

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FAQ

Frequently asked questions about the fogging test

What is the fogging test? The fogging test measures the release of volatile substances from materials that can form deposits on surfaces such as windows.

How long does a fogging test take? As a rule, you will receive the results within a few days, depending on the complexity of the materials.

What do I do if the exam is negative? We offer you comprehensive advice and recommendations to take appropriate measures and find alternative materials.

What sample quantities are required for a fogging test?

The sample quantities required for a fogging test depend on the standard and the test method used. Here are the general guidelines:

1. standard DIN 75201 (type A and type B)

Type A (glass plate method):
A sample quantity of 10 cm² is typically required. The sample is placed on a heated plate in a sealed chamber and the volatiles released condense on a glass plate above.
Type B (aluminum foil method):
Similar to type A, a sample volume of approximately 10 cm² is used. However, the volatile substances condense on a cooled aluminum foil.

2. standard ISO 6452 (international standard)

Sample quantity:
Again, a sample size of about 10 cm² is typically required to evaluate the amount of volatiles released at elevated temperature.

3. other specific requirements

Depending on the specific requirements of the customer or OEM standards, sample quantities may vary. It is important to check the respective standards or test requirements carefully.

What is the difference between the reflectometric and gravimetric test method according to DIN 75201?

Method A - Reflectometric method:

Principle: This method measures the change in reflectivity on a glass plate on which volatile components from the material sample are deposited.
Procedure: A material sample is heated in a beaker while a glass plate above it is cooled to 21°C. The temperature difference causes the volatile components to condense on the glass plate. The reflectance index of the fogged glass plate is then measured to determine the amount of condensed material.
Application: This method is particularly suitable for materials for which an exact determination of the optical fog effect is required.

Method B - Gravimetric method:

Principle: This method measures the weight of condensed volatiles on an aluminum foil.
Procedure: The material sample is heated in a beaker while an aluminum foil disc is cooled to 21°C. After 16 hours, the amount of condensed material on the foil is weighed.
Application: This method is ideal for an accurate quantitative determination of the amount of condensed volatiles.

FAQ

FREQUENTLY ASKED QUESTIONS ABOUT TESTING IN HUMID ENVIRONMENTS

Which standards are established with regard to testing in humid environments?

ISO 16750: Tests the functionality of electronic components under high humidity and condensation.
SAE J1455: Tests the moisture resistance and corrosion resistance of electrical components in commercial vehicles, even under extreme conditions.
DIN 50017: Focuses on the corrosion resistance of materials, especially when exposed to moisture such as salt spray or condensation.

Do you have any further questions? Our experts will be happy to answer your questions about various laboratory tests. Please feel free to contact us here. We look forward to processing your inquiry and helping you further.

Fogging

FOGGING TEST IN THE
AUTOMOBILE INTERIOR

Typical test methods

TESTS IN HUMID ENVIRONMENTS