HYDRONIUM ION H032
An ion formed by the transfer of a proton from one molecule of water to another. The number of hydronium ions in a liquid determines the pH of the fluid. Each step in the pH scale increases or decreases by a factor of ten.
This means that a pH of nine is ten times more alkali than a pH of eight.
A typical steel, steam boiler is run at a pH of between nine and eleven.