First, galvanized screws rust resistance
Galvanizing is a method of coating the screw surface with zinc to prevent rust. The zinc layer can form a protective film on the surface of the screw, which has very good corrosion resistance and can effectively prevent the screw from rusting in a humid and corrosive environment.
Second, whether it is necessary to conduct anti-rust treatment
1. Galvanized screws themselves have good anti-rust performance, which can prevent corrosion to a certain extent. For screws used indoors, even without additional anti-rust treatment, they can meet the requirements of use.
2. For screws used outdoors or in a humid environment, especially in a long-term high humidity environment, it is recommended to carry out additional anti-rust treatment. Galvanized screws can be coated with a rust inhibitor or stainless steel screws can be used.
3. If the screw needs to be fixed for a long time, such as during storage or transportation, it is recommended to spray anti-rust agent on the screw surface to better protect the screw.
Third, rust prevention treatment method
1. Anti-rust agent spraying: A layer of anti-rust agent can be sprayed on the screw surface to form a protective film to prevent corrosion.
2. Oil film rust prevention: A layer of oil film can be formed on the screw surface to prevent water intrusion, so as to achieve the effect of rust prevention.
3. Quality requirements: When purchasing screws, the manufacturer is required to provide high-quality galvanized screws to ensure that the zinc layer is good and uniform, and can better protect the screws.
4. Precautions
Anti-rust agent and oil film anti-rust agent can not enter the thread inside, otherwise it will reduce the mechanical properties of the thread, affect the connection of the thread; For electrical connections, screws that are not treated with rust should be selected to ensure their electrical conductivity.
In short, for galvanized screws used indoors, no additional anti-rust treatment is required; For screws used outdoors or in humid environments, additional anti-rust treatment is recommended. Under different circumstances, it is appropriate to adopt different anti-rust treatment methods to ensure the service life and safety of screws.
