Here's why:

* Some corrosives do produce deadly vapors.

* Strong acids: Concentrated acids like sulfuric acid (H₂SO₄) and hydrochloric acid (HCl) release corrosive fumes that can be deadly if inhaled. These fumes can irritate the respiratory system, causing coughing, choking, and potentially lung damage.

* Strong bases: Similar to acids, strong bases like sodium hydroxide (NaOH) and potassium hydroxide (KOH) can produce corrosive vapors that are harmful to breathe.

* Some corrosives don't produce significant vapors.

* Weak acids and bases: These substances may release some vapors, but they are generally less harmful and often less noticeable.

Here's what's important to remember:

* Always handle corrosives with extreme caution. Wear proper protective gear, including gloves, goggles, and respiratory protection.

* Never mix different corrosives together. This can create dangerous reactions and releases of harmful vapors.

* Use corrosives in well-ventilated areas.

* If you're unsure about the hazards of a specific corrosive, consult the safety data sheet (SDS) for that substance.

In summary, while some corrosives do create deadly vapors, it's not a universal truth. The danger depends on the specific chemical and its concentration. Always prioritize safety when handling corrosives.