What materials of construction are recommended for storing liquid calcium chloride solutions?
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The preferred material of construction for large liquid storage tanks is carbon
steel with an epoxy-based interior coating and a durable, high-quality coating on
the exterior. Non-metallic materials, such as fiberglass or plastic, work well
for smaller tanks storing product at ambient temperature; however, these materials
are not as durable as carbon steel and they lose strength at high temperature.
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Stainless steels are generally not suitable for liquid calcium chloride storage due
to their vulnerability to chloride-induced stress cracking. Unlined carbon steel
in continuous liquid calcium chloride service at ambient temperature is expected
to corrode 10-20 mils per year, which may or may not be acceptable depending on
the situation.
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Containers constructed from 5454 or 6061 aluminum have been shown to passivate with
time without suffering excessive corrosion and uneconomical service life.
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For additional information related to this topic, click on the link below.
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Calcium Chloride: A Guide to Handling and Storage
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