Metal corrosion and protection in EnglishMetal corrosion and metal corrosion protection Abstract The metal material has high strength excellent ductility and toughness heat cold may be casting forging

Metallic materials have been developed and used for thousands of years, starting with the use of copper and bronze in ancient times. With the discovery and development of iron, steel and other alloys, the use of metallic materials has greatly expanded and become more diverse. In modern times, the development of new metallic materials such as titanium alloys, aluminum alloys and magnesium alloys has greatly expanded their applications in various fields.

2 Corrosion of metal materials

The corrosion of metal materials is a complicated process that is affected by various factors such as the environment, the material itself, and the structure of the material. Corrosion can lead to a decrease in the mechanical properties of the material, reduce its service life, and even cause failure of the equipment. The corrosion of metal materials can be classified into several types such as uniform corrosion, pitting corrosion, crevice corrosion, and stress corrosion cracking.

3 Corrosion protection methods

There are several methods for protecting metal materials from corrosion, including the formation of a protective layer, electrochemical protection, and the use of corrosion inhibitors.

3.1 Formation of a protective layer

The formation of a protective layer is a common method for protecting metal materials from corrosion. This method involves the use of a coating or film to isolate the metal from the environment, preventing corrosion from occurring. Common coating materials include paint, enamel, and plating.

3.2 Electrochemical protection

Electrochemical protection is a method that involves the use of an electrical potential to protect the metal from corrosion. This method can be achieved through the use of sacrificial anodes or impressed current. Sacrificial anodes are used to provide a more negative potential than the metal being protected, thus preventing corrosion. Impressed current involves the use of an external current source to provide a protective potential.

3.3 Corrosion inhibitors

Corrosion inhibitors are chemical substances that are added to the environment around the metal material to prevent corrosion. These inhibitors work by reacting with the metal surface to form a protective layer that prevents further corrosion.

4 Application and development of corrosion protection methods

The application and development of corrosion protection methods have greatly improved the service life and reliability of metal materials. The development of new coating materials, such as organic coatings and ceramic coatings, has greatly expanded the range of applications for protective coatings. The development of new corrosion inhibitors and electrochemical protection methods has also improved the effectiveness and efficiency of corrosion protection.

In conclusion, the corrosion of metal materials is a complex process that can greatly affect the performance and service life of equipment. Various corrosion protection methods can be used to mitigate the effects of corrosion and prolong the service life of metal materials. The development and application of these methods will continue to play an important role in the field of materials science and engineering