Metz manufacture a range of acid proof concretes and mortars to resist the strongest chemicals in extremely demanding physical environments. Materials can be used as protective toppings, grout and mortars, or as concretes that require no further protective layers after placement.
Silicates are solutions of sodium or potassium silicate (also called water glass) that react with an acidic hardener in a condensation reaction to produce a hard silicate gel.
Potassium silicate is now used in preference to sodium silicate. Sodium silicate can have adverse reactions with sulphuric acid under certain conditions.
Halogen free potassium silicate denotes a product that does not use a fluoride hardener. There is a theory that fluorides can react with acids under certain conditions to form hydrofluoric acid.
Metz 7KE is a halogen free potassium silicate, acid proof cement used for the laying of Metz acid brick and acid tile systems.
Metz Sauereisen 54 & 54LW are potassium silicate based acid proof concretes which can be applied by casting or spraying (guniting) to provide protection against all concentrations of all acids except HF. Metz Saurereisen 54LW utilises a lightweight aggregate and is used where lower weight and/or higher thermal insulation is required.
Metz Sauereisen 54SG is a potassium silicate based structural grade acid proof concrete. It is resistant to all concentrations of all acids except HF. It can be used to cast pump plinths, kerbs etc or to replace concrete without the need for further protection against chemical attack.
Vinyl ester resin (also known as epoxy vinyl ester) is made by reacting acrylic or methacrylic acid with epoxy. Vinyl esters are an improved version of standard unsaturated polyesters with greater strength, higher chemical and heat resistance, reduced shrinkage and less susceptibility to moisture during curing.
Vinyl ester resin hardens by polymerization, using a promoter (accelerator) and a catalyst (hardener). The catalyst is generally a peroxide.
Metz 10VE is a novolac vinyl ester polymer concrete used in areas where particular chemical exposures make it better suited than Metz 10EN.
Typical Uses: Pulp Mills, Paper Plants, Oil Refineries.
Metz 14VE is a corrosion resistant cement based on a novolac epoxy vinyl ester resin and is used for bonding acid proof bricks and tiles.
Typical Uses: Chemical Plants, Bleach Storage Pulp and Paper Industry.
An epoxy resin is a compound that contains the reactive epoxide group. These groups can react by cross-linking with other compounds called hardeners or curing agents, forming rigid three-dimensional networks. Many types of curing agents can be used to impart different properties to the finished product. Among these curing agents are aliphatic amines, aromatic amines and cycloaliphatic amines.
There are two main types of epoxy resins:
Bisphenol A: Formed by the reaction of Bisphenol A and epichlorohydrin
Epoxy Novolac (also called epoxy phenol novolac): Formed by the reaction of phenol and formaldehyde.
Epoxy Novolac resins have higher functionality than Bisphenol A resins, which means they have more sites available for cross-linking with hardeners. This higher cross-link density results in products with higher chemical and temperature resistance.
Metz 5NF is an epoxy novolac grout and mortar with exceptional chemical resistance normally used as part of Metz acid resistant tile systems. Metz 5NF has extremely good chemical resistance and cures rapidly even at low temperatures.
Typical Uses: CIP Rooms, Mineral Processing, Secondary Containment.
Metz 10 Epoxy Concrete is an epoxy based polymer concrete. It is used to replace severely attacked concrete or can be applied to new concrete in areas subject to extreme mechanical stresses. Often used as an underlayment beneath other Metz monolithic flooring products.
Typical Uses: Metal Production Plants, Chemical Plants, Food Plants.
Metz 10EN is an epoxy novolac polymer concrete used to place over new or old concrete in areas subject to severe chemical attack. It can be used to cast pump plinths, kerbs etc without the need for further protection against chemical attack.
Typical Uses: Oil Refineries, Acid Plants, Mine Sites, Mineral Processing.
