25mm Thickness API 5L PSL1 X60 ERW Galvanized Steel Gas Pipe

Galvanized pipes are the pipes that a layer of protective zinc coating to pipe in order to prevent premature rust and corrosion. There are several different processes for galvanizing steel pipe,Hot-Dip Galvanizing and Electrogalvanizing are the most commonly used ways for steel pipes.To distinguish the Galvanized steel pipe and Electrogalvanized steel pipe,you should understand the manufacturing process of them.

Hot-Dip Galvanizing

As the name implies, this method involves dipping the base metal into a molten pool of zinc. First, the base metal must be cleaned either mechanically, chemically, or both to assure a quality bond can be made between the base metal and the zinc coating. Once cleaned, the base metal is then fluxed to rid it of any residual oxides that might remain after the cleaning process. The base metal is then dipped into a liquid bath of heated zinc and a metallurgical bond is formed.

Electro-galvanizing

Electrogralvanizing utilizes an electrical current in an electrolyte solution to transfer zinc ions onto the base metal. This involves electrically reducing positively charged zinc ions to zinc metal which are then deposited on the positively charged material. Grain refiners can also be added which helps to ensure a smooth zinc coating on the steel.