Acids are known to be corrosive substances, really. On the PH scale, these substances called acids would have values less than 7. We tend to be thinking the strongest acid would have a PH value of 1, but let's just check together first.
To start with, hydrofluoric is considered by some to be the strongest acid, but that is not so. The strongest acid is actually referred to as a superacid, with the name fluoroantimonic acid and a chemical formula HSbF6. This strongest superacid was formed by the equal addition of hydrogen fluoride (HF) to antimony pentafluoride (SbF5).
You can derive several superacids from different mixtures, but the strongest superacid known to man is the addition of hydrogen fluoride and antimony pentafluoride in an equal ratio. When this superacid makes contact with water, it decomposes explosively and rapidly. It also evolves vapor that is highly toxic.