Prevent the corrosion of cast iron guardrails

To prevent rusting of cast iron guardrails, the following measures can be taken:

    1. Protect the surface of the iron product from crystallization and drying;

    2. Cover the steel surface with protective layer (such as painting, anti-rust oil, burning, plating, baking blue, etc.);

    3, in the change of the internal structure of iron, the title synthesis just.