Info

CONCENTRATION %

FIGURE 3 Material selection for hydrochloric acid

CONCENTRATION %

FIGURE 3 Material selection for hydrochloric acid

• Sulfuric acid diluted up to 70%

• Hydrochloric acid

• Sodium hydrochloride

Figure 3 shows that a composite pump can handle up to a 40% concentration of hydrochloric acid at 175°F (80°C).

Sulfuric Acid Figure 4 shows the operating range of a composite pump, pumping sul-furic acid.

Ferrous and Ferric Chloride Ferric chloride is used as an etching reagent in the production of printed circuit boards. It is also used as a coagulant in wastewater treatment. In metal pickling operations, ferric is produced when hydrochloric acid reacts with iron and steel. In all of these applications, composite pumps have replaced the more costly titanium pumps.

Ethylene and Propylene Candidate applications for composites of ethylene and propy-lene are

• Propylene glycol

• Ethylene glycol

• Diethylene glycol

• Proplene chlorhydrin

Dyes Acid, sulfur, and Diazo dyes can be used in composite pumps.

0 20 40 60 BO 100 CONCENTRATION %

FIGURE 4 Material selection for sulfuric acid

0 20 40 60 BO 100 CONCENTRATION %

FIGURE 4 Material selection for sulfuric acid

Agriculture Chemicals Pesticides comprised of insecticides, herbicides, fungicides, and fertilizers can be severely corrosive to a composite pump. The chemical supplier should be contacted for their recommendations of materials suitable for use with their products.

Table 6 lists the maximum temperature and concentration of several liquids for various polymers.

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