Some people say that it will be a good things about cars being exposed to the sun, at least they can be cooked on it.
Of course this is just a joke. With hotter global temperatures and fewer underground parking spaces, many cars are opting to expose in the sun
And how much do you know
about the impact on the car under the sun
The impact of sun exposure on cars
Sun exposure has the following four effects on cars:
1. The aging and fading of car paint affects the life of car paint
2. Accelerate the aging speed of rubber strip and interior decoration to affect the sound insulation
3. Cause tire damage, affect the service life of tires
4. Create harmful gas, which affect your health
Car exposure will not only lead to an increase in the car temperature (infrared radiation), exposure will also accelerate the aging of the car, the ultraviolet light in the sun is the main cause of photodegradation and photoaging.
The daylight range is as follows:
| Area | wavelength | Distribution | Irradiance value |
| UV |
295-320 320-400 |
0.4 6.4 |
4 70 |
| Visibl light | 400-800 | 55.4 | 70 |
| Infrared | 800-2450 | 37.8 | 604 |
| total radiation | 300-2450 | 100.0 | 412 |
Since exposure is unavoidable, this requires suppliers to take a series of countermeasures against photoaging. For example, adding light stabilizers, anti-aging agents and physical protection to various polymer products can inhibit and slow down the process of photodegradation and prolong life. Second, a car must undergo multiple tests before it goes on sale, including artificially accelerated light aging tests.
What is the artificial accelerated photoaging simulation?
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Water (humidity) |
Heat (temperature) |
Light (Sun illumination ) |
Artificial accelerated photoaging refers to the simulation of some important factors in the enhanced natural climate, such as temperature, humidity, sunshine, rainfall, etc., to shorten the photoaging test cycle, and the test conditions are controllable, and the test results are reproducibility.
Common light test standard
1. Xenon light light
Interior components: SAE J1885, SAE J2412,
External trim: SAE J1960, SAE J2527, ISO 4892-2, cycle 1, GB / T 1865, cycle A, GB / T 16422.2
2. UV-light illumination
ISO 4892-3, ASTM G154
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