pH
pH is another term you'll hear often in regard to water
testing.
Compounds dissolve in water, separating into positively
charged ions called cations and negatively charged ions called anions.
Cations and anions combine in a number of ways forming
molecules of various salts, acids and bases.
Water high in acid is termed "acidic" while water high in
bases is termed "alkaline".
pH is a measurement of the acidity-alkalinity balance of
water, with a pH of 7 considered neutral. We find that in boilers, the ideal pH
is around 10. Water with a pH above or below 10 becomes aggressive to metal
surfaces and causes damage to plant equipment.
It is critical to monitor pH frequently.
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