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Very nicely written article.

One thing about rust, salt and moisture: salts deliquescence. I.e. they absorb moisture from air until there is enough liquid to dissolve themselves in. This happens below 100% relative humidity (around 75% for common salt, but as little as 31% for cacl2). So salt-contaminated surfaces can easily get wet even when the air is not that humid, bad news for steel!

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...so we should be washing off salt from our cars when they treat the roads for snow?

Or does the new chemical they're using not have the same problem?

> so we should be washing off salt from our cars when they treat the roads for snow?

Kinda depends on how long you're gonna keep the car

If you have ever driven old cars in the Midwest, terrifying amounts of rust from road salt is definitely a Thing. Or at least it used to be decades ago, I assume it still is now.

Still is.

Washing the salt off will reduce rate of corrosion. Probably the most important to wash is the underneath. I suppose it is more important for cars that do not do that many miles/year as in this case the internal parts will last a long time.

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