BRICK ISSUE GUIDANCE :
VANADIUM STAINING IN BRICKWORK
SYMPTONS, PREVENTION, CURE.
A green-yellow deposit on the face of brickwork is often Vanadium staining.
Similar in nature to efflorescence, the deposits are vanadium salts are a combination of sulphates, chlorides, and hydrates of vandal salts. These originate from the raw materials used in the manufacturer of many facing bricks. Vanadium oxide and sulphates pass through the face of the brickwork and as they dissolve leave a green-yellow deposit of vandal salts on the face of the brickwork. |
Vanadium staining can occur to different levels of severity and can simply occur as a natural phenomenon.
Often though they occur due to incorrect brick cleaning with incorrect or inappropriate brick cleaning acids. Poor on site handling and storing processes can also encourage Vanadium Staining. |