MIL-HDBK-1003/6
Table 20 (Continued)
Chemicals for Internal Boiler Water Treatment
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*
*
* Comment
*
Chemicals
Purpose
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*
*
*
*
*
* Protects against both *
* Filming amines;
Control return-line
* Octadecylamine,
*
corrosion by forming * oxygen and carbon
*
* etc.
*
a protective film on * dioxide attack. Small *
*
* amounts of continuous *
*
the metal surfaces.
*
*
* feed will maintain
*
*
* the film. Do not
*
*
*
* use where steam
*
*
*
*
* contacts foods.
*
*
*
*
*
* Neutralizing amines; * Control return-line
* About 2 ppm of amine
*
* corrosion by
* is needed for each ppm *
* Morpholine,
* cyclohexylamine,
* neutralizing CO2
* of carbon dioxide in
*
* benzylamine,
*
* steam, but actual
*
* diechylaminoethanol
*
* ratio depends on amine *
* (DEAE), amino-methy- *
* selected due to its
*
* isopropanol (AMP).
*
* distribution ratio.
*
*
*
* Keep pH in range of
*
*
*
* 7.5 to 8.5 or higher. *
*
*
* These chemicals will
*
*
*
* not be used if steam
*
*
*
* comes into contact
*
*
*
* with food or surgical *
*
*
* instruments. Morpholine*
*
*
* at concentrations
*
*
*
* higher than 40 %
*
*
*
* is flammable and
*
*
*
* should not be used.
*
*
*
*
*
* Sodium nitrate, NaNO3 * Inhibit caustic
* Used where the
*
*
* embrittlement.
* water may have
*
*
* embrittling
*
*
*
*
* characteristics.
*
*
*
*
*
* Tannins, starches,
* Prevent feed line
* These organics, often *
* glucose, lignin
* deposits, coat scale
* called protective
*
* derivatives and
* crystals to produce
* colloids, are used to *
* polymeric
* fluid sludge that
* distort scale crystal. *
* dispersants.
* won't adhere as
*
*
*
* readily to boiler
*
*
*
* heating surfaces.
*
*
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