Hi there,
How to prevent device to sulfate in polluted atmosphere?

There is often haze .

When you see catalog of a device, there are humidity, attitude, temperature and ... factors. but not pollution.
Factory's pollution has H2SO4, and in humid weather + any metals -> sulfate.

any solutions?

Thanks.

Try additional casing around the device made from a plastic appropriate to your environment.

If you are using wireless you should test the casing material. Put it in a microwave oven (with a cup of water) and turn on full power. If the plastic warms up (or melts) then it is absorbing microwave energy and not suitable for wireless enclosures.