Definition - What does Containment Lining mean?
A containment lining is a covering consisting of PVC liners, elastic liners or hybrid polymers or polyesters to provide protection from corrosion or chemical attacks and to cover large cracks in concrete structures or tankages, sumps, pits or any other containment area.
A containment lining maintains the toughness in metallic, plastic or concrete structures that are used to store petroleum products, chemicals and other reactive solvents.
Corrosionpedia explains Containment Lining
To achieve high performance and durability, containment linings are used to protect the interior and exterior surfaces from damage. This has led to the use of epoxy elastomeric products that are sprayed on the surfaces of the containment area to create a membrane that forms a resilient layer of protection. The use of primers with synthetic polymer products is common in this process.
A good tank lining should create an impermeable barrier, fully adhere to the substrate and seal all gaps.
Since the beginning of the 20th century, high-density cement mortar lining has been used for concrete tank lining. Factors that make it a suitable lining method for storage tanks are:
- The absorption rate of oxygen and moisture is minimal.
- The pH of the lining creates an oxide on the metallic surfaces, thus preventing further corrosion.
- The lining has self-healing properties and is also easily repaired with minimum preparations.