1. Composition of alloys to achieve the purpose of rust prevention by changing the internal structure of iron, such as adding chromium, nickel and other metals to ordinary steel to make stainless steel, which can greatly increase the rust resistance of steel products .
2. Add a protective layer-adding a protective layer on the surface of iron products is also a common and important method to prevent rusting of iron products. According to the different protective layers, it can be roughly divided into the following types:
①. Apply mineral grease, paint or fired enamel, spray plastic on the surface of iron products. For example, cars, buckets, etc. are smeared paint, and machinery is common to apply mineral oil.
②. Plating a layer of metal that is not easy to rust, such as zinc, tin, chromium, nickel, etc. on the surface of iron products by electroplating, hot plating, etc., these metals can form a fine oxide film to prevent Iron products come into contact with substances such as water and air and cause rust.
③. Use chemical methods to form a fine and stable oxide film on the surface of iron products to prevent iron products from rusting.
3. Keeping the surface of iron products clean and dry is also a good way to prevent iron products from rusting.