Security door production problems

Updated on Security door 2024-07-26
4 answers
  1. Anonymous users2024-01-24

    It must be done, if you don't do it, it will be easy to peel off the spray surface and rust.

  2. Anonymous users2024-01-23

    Phosphating treatment is to form a phosphate film on the surface of the metal, combined with paint, spraying and other processes to enhance the anti-rust effect of the metal.

    The paint and spray surface of metal products that are not phosphated are easy to fall off and rust.

  3. Anonymous users2024-01-22

    The corrosion resistance and adhesion of phosphating treatment are better.

  4. Anonymous users2024-01-21

    The security door is generally made of cold-rolled sheet material. Phosphate if not applied to the surface will cause rust.

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