First of all, the galvanized layer, as a protective layer, can effectively isolate the steel from direct contact with the external environment. During the galvanizing process, the surface of the steel is evenly covered with a layer of zinc, which can prevent oxygen, moisture and other corrosive substances in the air from directly contacting the steel, thereby greatly slowing down the corrosion rate of the steel.
Secondly, the thickness of the galvanized layer is one of the key factors affecting corrosion resistance. Generally speaking, the thicker the galvanized layer, the stronger its anti-corrosion ability. A thicker galvanized layer can provide longer protection and maintain the integrity of the steel even in harsh environments. Therefore, in the galvanizing process, it is crucial to control the thickness of the galvanized layer.
Furthermore, the uniformity of the galvanized layer also has an important impact on corrosion resistance. If the galvanized layer is unevenly distributed and there are weak links, then these parts are prone to become corrosion breakthroughs, resulting in a decrease in the corrosion resistance of the entire galvanized steel keel profile. Therefore, during the galvanizing process, it is necessary to ensure the uniformity of the galvanized layer to improve the overall anti-corrosion ability.
In addition, the type of galvanizing process will also have an impact on corrosion resistance. Hot-dip galvanizing and electro-galvanizing are two common galvanizing processes. Hot-dip galvanizing is to immerse the steel in molten zinc to form a dense galvanized layer on its surface; while electro-galvanizing is to deposit a layer of zinc on the surface of the steel through electrolysis. In contrast, the galvanized layer of hot-dip galvanizing is thicker and more uniform, so its corrosion resistance is also better.
The treatment process after galvanizing is also important. For example, passivation of the galvanized layer can further improve its corrosion resistance. Passivation can form a dense oxide film on the surface of the galvanized layer, thereby enhancing the protective ability of the galvanized layer.
The galvanizing process of galvanized steel keel profile has a significant impact on its corrosion resistance. By controlling the thickness and uniformity of the galvanized layer and selecting the appropriate galvanizing process and treatment process, the corrosion resistance of galvanized steel keel profile can be significantly improved and its service life can be extended.
