Cold galvanizing also called electro galvanized, galvanized pipe in Ji'nan is the use of electrolytic equipment will work after degreasing, pickling solution into the composition of the zinc salt in the anode and connected electrolytic equipment; cathode zinc plate placed in the workpiece in the electrolysis equipment connected across the power supply is switched on, the current from the anode to the cathode of the directional movement will, depositing a layer of zinc on the workpiece.
Hot dip galvanizing is to remove the oil, acid washing, dipping, soaked in the dissolved zinc solution after drying for a certain time, it can be put out.
The galvanizing surface is smooth and bright, and the electroplating layer with color passivation technology is also yellow green, and it is seven color. The electroplating layer of white passivation process is green white or white, and the coating of white passivation process is slightly colourful with sunlight at a certain angle. The galvanized pipe of Ji'nan is prone to "electric burn" in the corners of complex workpieces, which is dark. The zinc layer in this part is thicker. It is easy to form a current dead angle in the negative corners, resulting in an undercurrent dark area. The zinc layer in the area is thin, and the workpiece has no zinc lump and lump.
At the end of galvanized steel with zinc needle or a tumor, both inside and outside the galvanized layer intact, no appearance of cold galvanized cold galvanized coating is smooth and bright, with a certain angle under the bright sun and into a colorful, cold plated steel tube hole only at both ends with a little zinc layer, inside no galvanized layer the two ends of the steel pipe, cold galvanized as smooth, no zinc tumor, no standard appearance.
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