1. The composition alloy changes the internal structure of iron, and chromium, nickel and other metals can be added to ordinary steel to make stainless steel, which can greatly increase the anti-rust ability of steel products.
2. The more common and commonly used method is to cover the surface of the iron products with a protective layer to prevent the iron products from rusting. According to the composition of the protective layer, they can be divided into the following types:
①Coating mineral oil on the surface of iron products, paint or enamel, spraying plastic, etc., such as cars, buckets, etc., the machine is often coated with mineral oil
② Plating a layer of non-rusty metal on the steel surface by electroplating, hot plating, etc. These metals will form a protective film to prevent the iron barrel from contacting with water, air and other substances to rust.
③ A dense and stable oxide film can be formed on the surface of the iron drum by chemical methods to prevent iron products from rusting.