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Boiler Killers

What causes boilers to be taken out of service prematurely?
Most anyone experienced in steam and boiler maintenance will say "thinning of the plates" or "crown sheet." It all gets down to metal loss of pressure parts that are costly to repair or replace. Let's simplify some factors that are inter-related and all contribute to killing boilers. Using this information, you'll be able to save your boilers and be able to extend their life.


It is in perfect contact with the steel to "host" the chemical reactions we call rusting and corrosion.


Yes, we need it to breathe and burn fuels. It also pits and rusts iron. Water has both the oxygen that is used to make the water plus, extra dissolved oxygen that comes from the air. This extra dissolved oxygen is the boiler killer.

Before and After of Cleaned Steam Engine


Water contains a balance of acid and alkali (base). When they are in balance, the pH is close to 7, or neutral. When the acids predominate, the pH is less than 7, and each number below is 10 times stronger than the one before it. For example, a pH of 5 is 10 times stronger acid than pH 6. A pH of 4 is 100 times stronger than pH 6. Acids dissolve metals, especially boiler iron & steels.


Common limestone deposits, because they block heat transfer when steaming and hold moisture in contact with metal when shutdown. This aids dampness, oxygen, and acids in doing their destructive work.


Most water supplies have naturally occurring dissolved salts. In ice and snow country, wintertime roadway de-icing salts run off and get into ground water. This ends-up concentrating in our boiler water, causing serious and rapid corrosion of boiler steel. BoilerSaver™ modern polymer treatments protect against salt corrosion.

The Human Factor

No one would intentionally wreck a good boiler, but there are plenty of folks who are their own worst enemy when it comes to boiler life. The old-time handbooks stated that a boiler in constant and reasonable use will outlast a boiler that is idle. In our era, many boilers are idle most of the time. The best thing you can do is learn and practice the good habits that will result in the best performance, longest life, and cost savings for your boiler.

To learn more, get The BoilerSaver™ Book

Steam Train in Snowy Field