ACID PROOF BRICKS & ACID RESISTANT BRICKS MANUFACTURER SINCE 1969

Selected clays with minimal iron content, pressed and fired at high temperature so the body fuses into a dense mass. The result is low water absorption and high mechanical strength, which is what stops acid from penetrating the brick. Iron content matters because iron in the body reacts with acid and opens up a path into the brick.

Fire bricks or refractory bricks are made to survive heat. Acid proof bricks are made to survive chemical attack. A refractory brick in an acid tank will be eaten away, and an acid proof brick in a furnace will not hold up to furnace temperatures. Where both heat and acid are present, the system is built from acid proof bricks laid in potassium silicate mortar, which carries the combination up to 900 C.

The 38 mm brick suits general acid proof lining and flooring duty. The 75 mm brick is used where mechanical load, impact, thermal shock or chemical concentration is higher, for example reaction vessels, pickling tanks, absorption towers and heavy process floors. Send the chemical, its concentration, the operating temperature and the floor or vessel loading and we will confirm the thickness. Custom thicknesses from 40 mm upward are made to order.

In layers. The concrete or steel surface is prepared and dried, a chemical resistant membrane is applied as the second line of defence, bricks are set on a bed of acid resisting mortar, and the joints are filled with the same resin mortar system. The lining is then cured before the plant goes back into service. Every layer matters, and a lining fails at its joints long before the brick itself gives way.

Because no joint is perfect over a plant's lifetime. The membrane sits between the substrate and the brickwork and catches anything that works its way through the mortar joints, protecting the concrete or steel underneath. On tanks and pits that hold liquid continuously it is the difference between a lining you repair and a structure you rebuild.

The mortar sets the limits of the finished lining, not the brick. Furane and phenolic cover general acid and alkali duty up to 170 C, cashew CNSL up to 190 C, and potassium silicate handles high temperature service up to 900 C. For hydrofluoric acid, fluoride salts and strong hot alkalis, carbon filled mortar is used. We manufacture the full bedding and joint filling range, so the brick and the mortar come from one source.

Yes. Where hydrofluoric acid, fluoride salts or strong hot alkalis are involved, carbon bricks laid in carbon filled mortar are specified instead of standard acid proof bricks. Tell us the chemical and its concentration and we will confirm whether carbon brick is required or whether a resin mortar system is sufficient.

Yes. Kothari Corrosion Controllers has manufactured acid proof bricks at Odhav, Ahmedabad, Gujarat since 1969, under the registered trade mark Acid Proof. We supply plants across India and export to African countries, the Middle East, South America and across the Asian subcontinent, and we carry out brick lining work with our own trained applicators.

It depends on the brick thickness, the mortar system, whether a membrane is required, the total area and whether you need supply only or turnkey application at site. Send your drawing, the chemicals handled, the concentration and the operating temperature and we will quote the complete lining. Call +91 9825006626 or email info@acidproof.com.