Are some car glasses more resistant to acid rain?

[lucas_]

I have two cars, one an early 2000 Honda CRV and second one a 2016 Subaru Forester.

The Subaru Forester is prone to acid rain marks in the windshield and side windows and rear. But the CRV didn't seem to have obvious acid rain after more than 14 years parked in open air. Are some glass more resistant to acid rain marks?

 

[Tom.G]

Well, not a direct answer to your question, but here is some background info that may help.

If I recall correctly, hydrofluoric is one of the few acids that attacks glass. But if other things are not dissolving, it's probably not hydrofluoric acid.

However strong alkalis will attack most glasses. Even detergent for automatic dishwashers is strong enough to etch glass, that's why Sodium Silicate is added to them, to repair the pits. Sodium Silicate solution is also known as 'water glass.'

You could get some Litmus Paper (Ph test strips) to narrow down if there is acid or alkali fallout. The stuff is even available on Amazon.com in the USD $4 to $6 range.

(Now let's see if some real chemists come up with some real answers.)

Cheers,
Tom

 

[256bits]

What are acid rain marks?
and how do you know acid rain is the cause?
Is that a haze or spots on the glass.
It could be just hard water mineral deposits that are stuck to the glass and difficult to remove.