Corrosion is one of the fundamental factors of the global crisis of material that causes significant losses to the economy of each country and therefore it is important to be aware of its occurrence and the consequences that carries. Steel DX55D is a high quality low-carbon steel to corrode under the influence of atmospheric and in water, aqueous solutions of salts or acids. This steel is thermodynamically unstable in contact with oxygen. The corrosion properties of the steel in the industrial and humid atmosphere are different. For the protection of metal emphasize the cathode and surface protection. At the process of surface protection there is the difference between methods of modifying the surface of the coating. It is the most widely used method of coating to protect metals from corrosion. Metallization diffusion method is a method of creating a coating heating surface. Boroning is one of those procedures. Boronizing the thermal, chemical and diffusion controlled surface modification process that could be carried in a solid, liquid and gaseous medium. This process can get certain properties which medium alloy steels can replace high alloy. Boride layers are characterized by good wear resistance.