Cold galvanizing, also called electric galvanizing, is the use of electrolytic equipment to remove oil, pickling, after the pipe into the composition of zinc salt solution, and connected to the negative electrode of the electrolytic equipment. A zinc plate is placed on the opposite side of the pipe fitting, connected to the positive electrode of the electrolytic equipment to turn on the power supply, and a layer of zinc is deposited on the pipe fitting by the directional movement of the current from the positive electrode to the negative electrode.
Cold galvanizing is in the plating tank through the current unidirectional zinc gradually plated on the metal appearance, the production speed is slow, the coating is uniform, the thickness is thin, usually only 3-15 microns, the appearance is bright, smooth, high aesthetics, poor corrosion resistance, generally a few months will rust. Hot dip galvanized coating is thicker, generally 30-60 microns, coating corrosion resistance is higher. Suitable for outdoor work of steel parts, such as highway fences, power towers, large size fasteners and other more “rough” workpiece long-term rust prevention.
The surface of hot-dip galvanized steel wire is smooth, smooth, no cracks, joints, thorns, scars and rust, the galvanized layer is uniform, strong adhesion, corrosion resistance, toughness and elasticity are excellent. The tensile strength should be between 900Mpa-2200Mpa (wire diameter Φ0.2mm-Φ4.4mm). The number of twists (Φ0.5mm) is more than 20 times, and the repeated bending should be more than 13 times. Electrogalvanizing thickness is thin, usually only 3-15 microns, the appearance is bright, smooth, high aesthetics, poor corrosion resistance, generally a few months will rust.
Post time: 26-04-24