The zinc melting tank for hot-dip galvanizing of steel structures, usually called the zinc pot, is mostly welded with steel plates. The steel zinc pot is not only easy to make, but also suitable for heating with various heat sources, and easy to use and maintain, especially suitable for supporting the use of large steel structure hot-dip galvanizing production line. Zinc melting tanks made of other refractory materials in the form of internal heating, upper heating and induction heating have high manufacturing costs and maintenance requirements, and are rarely used for hot galvanizing of steel structures.

The quality of hot-dip galvanized coating and production efficiency are closely related to the process technology used and the life of the zinc pot. If the zinc pot is corroded too quickly, it will lead to premature damage or even zinc leakage through perforation. The direct economic loss and indirect economic loss caused by production stoppage are large. Therefore, how to improve the service life of zinc pot is a matter of great concern. This book will introduce and analyze the material, processing, structure, temperature rise, zinc bath temperature, heating intensity and other factors that mainly affect the service life of the zinc pot.