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9 Cards in this Set
- Front
- Back
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What is the most adherent and difficult type of scale
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Calcium sulfate
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What is the most common form of hardness
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Calcium and magnesium carbonates
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If present in boiler water and feed water, it forms a hard, glassy coating on the boiler's waterside
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Silica
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What causes corrosion on feed water heaters, and associated piping
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Acidic-dissolved oxygen and carbon dioxide are present
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What mainly is the cause of pitting type corrosion
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Dissolve oxygen
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What causes deterioration of ferrous metal
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Carbonic acid-carbon dioxide in water
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What do you call to the continuous migration of relatively small quantities of boiler water solids with the steam
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Boiler carryover
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Applies to the formation of bubbles on the surface of the boiler water
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Foaming
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Results when slugs of boiler water are thrown over into and carried off with steam and spasmodic action similar to foaming
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Priming
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