What is the difference between galvanized wire electroplating and hot-dip galvanizing?
Electro-galvanized wire: cold galvanizing; it is to use electrolytic equipment to deoil, pickle, and then put the pipe into a solution of zinc salt, and connect the negative electrode of the electrolytic equipment, place a zinc plate on the opposite side, and connect it to the positive electrode of the electrolytic equipment When the power is turned on, a layer of zinc will be deposited on the pipe fittings by the directional movement of the current from the positive electrode to the negative electrode. The electro-galvanized wire is gradually plated on the metal surface by the unidirectional current in the electroplating tank. The production speed is slow and the coating is uniform. , The amount of zinc on the galvanized wire is thin, usually only 3-15 microns, the appearance is bright, and the corrosion resistance is poor.
Electro-galvanized wire is mainly used in communication equipment, medical equipment and woven mesh, brush, wire rope, filter mesh, high-pressure pipe, construction, handicraft and other industries.
Hot-dip galvanized wire is pickling, phosphating, wire-drawing, and galvanizing of various high-quality medium carbon steel or high-quality high-carbon steel; But it is not uniform, the minimum thickness allowed by the market is 45 microns, and the maximum thickness is more than 300 microns. The color is darker, consumes a lot of zinc metal, forms an infiltration layer with the base metal, and has good corrosion resistance, and hot-dip galvanizing can be maintained for decades in an outdoor environment.
Due to the thicker amount of zinc on the hot-dip galvanized wire, hot-dip galvanizing has better protective performance than electro-galvanizing, so it is an important protective coating for steel parts used in harsh working environments. Hot-dip galvanized products are widely used in chemical equipment, petroleum processing, marine exploration, metal structure, power transmission, shipbuilding and other industries. , highway guardrails, etc., have been widely used in recent years.