Traces of vanadium in significant-temperature combustion goods variety droplets of molten vanadates. These attack the passivation layers on metals and lead to superior temperature corrosion, which can be a priority especially for inner combustion engines. Molten sulfate and lead particulates also have this kind of influence. 1600 – Tobacco https://broadfar.com/non-combusted-cigarettes-a-safer-alternative-or-just-a-myth/