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Splash Water Test (Ice Water Shock Test)
The Splash Water Test, also referred to as the Ice Water Shock Test, is part of ISO 16750-4 and is designed to simulate the harsh environmental conditions experienced by vehicle components during winter driving. It specifically replicates the thermal shock effects that occur when cold water (such as slush, snow, or ice water) suddenly contacts hot vehicle parts.
This test is critical for validating the mechanical robustness and sealing integrity of components located in areas of a vehicle exposed to road spray, such as the underbody, wheel wells, and lower engine bay.
The test aims to evaluate a component’s resistance to rapid thermal stress and its ability to maintain mechanical integrity and sealing performance after sudden temperature changes caused by water splashes.
- Temperature Range: -50 to 150°C
- Humidity Range: up to 98% RH
- Water Temperature Range: 25°c to 0°C
Standards Followed:
- ISO 16750-4: Road vehicles – Environmental conditions and testing for electrical and electronic equipment – Part 4: Climatic loads
- OEM-specific adaptations or extensions to ISO 16750 may also be applied depending on the manufacturer.
| Test Procedure | |
|---|---|
| Pre-conditioning (Heating Phase) |
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| Splashing Phase (Thermal Shock Exposure) |
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| Directional Application |
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| Number of Cycles |
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Failure Criteria:
A component is considered to have failed the splash water test if any of the following are observed:
- Mechanical Cracking: Visible cracks or fractures in the material structure due to thermal stress.
- Seal Failure: Compromise or breach in seals or gaskets, often caused by differential thermal expansion between materials.
- Water Ingress: Penetration of water into the internal parts of the unit, which could lead to electrical failures or corrosion.
- Functional Degradation: Any loss of performance or functionality of the unit post-test.
This test applies to automotive electronic and mechanical components located in zones prone to water splashing, such as:
- ABS modules
- ECUs mounted in wheel wells
- Electric drive units or inverters
- Underbody sensors
- Actuators and control modules
The test ensures these parts can withstand extreme thermal cycling without degradation of mechanical structure or sealing performance.
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