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If that were the case then not many cars would run in Moscow.
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If that were the case then not many cars would run in Moscow.
Let alone Munich.
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I would say maybe a faulty batch of springs at time of manafacturing. The springs on my Audi are approaching 16 years old so and they are rusted up.
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L'escargot is, of course, quite right. Virtually all coil spring failures are fatigue failures.
The fatigue failure can be initiated more quickly by factors like corrosion, and as mentioned in the article, inclusions in the steel. By mechanically wedging the crack faces open, corrosion can rapidy speed the process of fatigue, but this doesn't make the failure a corrosion failure, it's still a fatigue failure hastened by corrosion.
Owing to the geometry and loading of the coil spring, the crack almost always begins on the inner surface of the coil, where even if the coil were perfectly clean, it would be difficult to see. So, very few coil springs are "caught" while the crack is propagating, and almost all are only found after the spring has finally fractured. The final fracture is a pure overload failure, because the working section of the spring has been so diminished by the propagation of the crack.
I applaud the creativity of the insurance company - to many people it might sound like a plausible explanation - but it's almost certainly untrue.
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