High Tensile 12.9 Threaded Rod
Why do Grade 12.9 stud Bolts need to be oiled?
Generally, after the production of
12.9 threaded bar, there is a step in the process to oil the screws. Some customers will ask to wipe off the oil stains when purchasing, which makes the
12.9 Threaded Rod lose protection and easily rust in humid environments such as rainy days during transportation.
Secondly, the
High Tensile 12.9 Threaded Rod Supplier has a lot to do with the environment in which they are stored. Warehouses should avoid humid environments and packaging should also ensure sealing. Alternatively, you can spray a layer of anti-rust oil when storing.
Blackening is a chemical surface treatment process. The principle is to produce an oxide film on the metal surface, thereby isolating the air and achieving an anti-rust effect. By comparing several commonly used surface treatments such as electrogalvanizing, electrocadmium plating, Dacromet, etc., it can be seen that although the blackening cost is relatively cheap and beautiful, its anti-rust performance is poor and it is easy to rust.
Factory2 Thread Rod
High Tensile 12.9 Threaded Rod workshop
