Hot Rolled Steel
Defect and Repair
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Steel
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Defect
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Repair
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Fungus Fungi can grow as a result of suitable conditions, e.g. the presence of fungal spores, moisture and also of nutrients from “dirt” of various types. |
If fungus is suspected, it is recommended that a spot test with sodium hypochlorite solution be carried out for identification purposes.
To restore steel affected by fungus, it is recommended that the roof be washed down with a 2% sodium hypochlorite solution. The sodium hypochlorite solution can be made up from commercially available bleaches |
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Lichen Lichen is a growth incorporating both fungus and algae |
If fungus is suspected, it is recommended that a spot test with sodium hypochlorite solution be carried out for identification purposes.
To restore steel affected by fungus, it is recommended that the roof be washed down with a 2% sodium hypochlorite solution. The sodium hypochlorite solution can be made up from commercially available bleaches |
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Corrosion Acid splash (i.e. from acid cleaning agent for cleaning mortar of brickwork) contacts to prepainted steel sheeting and gutters, can lead to early failure of the paint and corrosion of the metal can occur. The acid can pass through the paint coating at tension bends and attack the metallic coating below. |
It is recommended that the areas be appropriately masked during the acid cleaning operation. |
Note: For more defects, please refer to the Defect Library.