The bolt factory tells you that during the screw prod […]
The bolt factory tells you that during the screw production process, such as the forging process or the turning process, the surface of the screw may be soiled by iron filings or some relatively written particles produced in the process. If these screws are not removed, it will affect the appearance of the screw surface or cause the screws to rust. Usually, this surface treatment needs to be passivated to remove impurities on these surfaces.
The bolt factory tells you that if the screw is passivated, it will not only make the surface of the screw smoother and brighter, but also enhance the rust and corrosion resistance of the screw. The bolt factory tells you that because of the different passivation treatments, the salt spray test time that can pass is different, some may take 24 hours, and some may take 1000 hours. This requires customers to actively express how long the salt spray test will take. Otherwise, the screw manufacturer will handle the screw by the standard passivation treatment.
The bolt factory tells you that if the screw is passivated according to the standard, it can only pass the salt spray test for 12 hours, and it cannot be longer. Therefore, when performing passivation treatment, it is necessary to inform the screw manufacturer of its requirements, otherwise the effect will be different from what you need.