The Difference of The Process

The difference of the process: The hot-dip galvanizing is the workpiece degreasing, pickling, dipping, drying after immersion in liquid zinc dissolved some time, asked to come to. Cold galvanizing, also known as electro-galvanized, into the use of electrolysis equipment will workpiece after degreasing, pickling ingredient for the zinc salt solution, and connect the anode of the electrolysis equipment; Opposite the workpiece placed on the zinc plate connected to the electrolysis cathode, power, use the directional movement of the current from the cathode to the anode, a layer of zinc will be deposited on the workpiece. The difference of appearance: Electro-galvanized relatively smooth appearance, bright color passivation process the plating layer of yellow-green in color, was colorful. White passivation process of the plating layer was green white or white were green, white coating of the passivation process and the sun was at an angle slightly colorful. The angle of the complex workpiece edge parts prone to ablation from the dark parts of the zinc layer is thicker. Yin Kok site is easy to form the current dead ends and the undercurrent gray area, the zinc layer is thinner in the region. Workpiece overall zinc tumors, caking phenomenon. The appearance of hot-dip galvanizing than the electric galvanized a little rough, silvery white appearance prone process waterlines and a few drops of tumor, in particular, is more obvious at the end of the workpiece. But a few times, hot dip galvanized zinc coating electro-galvanized thick corrosion resistance is several times that of the electro-galvanized. The difference of galvanized finished: 1 A hot galvanized steel inner and outer walls are galvanized or cold galvanized steel is only the outer wall of galvanized steel; 2 Cold coating is uniform, very thin; Thermal coating thick, uneven thickness. 3 Cold-plated appearance of bright, hot dip darker. 4 Cold coating thinner, less corrosion resistance; Thermal coating thick cold galvanizing a few times, and to penetrate the layer formed with the base metal, and good corrosion resistance; 5 Cold galvanized steel look surface bright, smooth; No cold hot galvanized appearance of fine bright galvanized, hot dip galvanized steel pipe surface looks like there are some rugged bump, and the surface is not shiny, less reflective. Source:carbon-pipe.com