Galvanized Steel Wire Rope Smooth Surface Is Uniform And Firm
Galvanized steel wire rope, the provisions of the weight of zinc, copper sulfate test the number and time, and indicate the implementation of the standard. Such as: GB / T8918-1996, the diameter of> 0.55 ~ 0.6mm galvanized monofilament according to Table 3, and according to GB2973-91 and GB2972-91, GB2973-91 test methods. The Japanese standard JISG3525 only specifies the weight of the zinc layer, for the diameter of 0.5 ~ 0.8mm zinc wire according to the requirements listed in Table 4, and according to JISH0401 test method.
Galvanized rope rope core used in the past commonly used sisal and jute manufacturing, but because of these materials at work easy to absorb acid, alkali, sea water and other corrosive substances, resulting in the early corrosion of the inner wire wire, has been switched to polypropylene as a core.
Galvanized steel wire rope can be used for high-level construction, travel and bundling, traction, strapping and other fields, can also be used for shipping, offshore oil exploration, aircraft handling and marine fishing, trawling, network, network and other fisheries.
Galvanized steel wire rope twist and ordinary round wire rope the same, but according to the use of wire rope working conditions, the thickness of the raw material steel zinc layer has different requirements: diameter 0.2 ~ 5.0mm special number and I galvanized steel wire rope, coating Thickness can be divided into three groups: the amount of zinc on the thin coating group is 15 ~ 135g / m2, for mild corrosion conditions; the amount of zinc on the coating group is 60 ~ 200g / m2 for medium corrosion conditions; The amount of zinc on the 75 ~ 260g / m2, for serious corrosion conditions. In order to ensure the quality of wire rope, steel galvanized layer surface should be smooth, complete, uniform and solid. When the galvanized steel wire is spirally wound on a mandrel with a diameter of 5 times or 10 times the diameter of the wire, the zinc layer should not fall off or crack. The corrosion resistance of the galvanized layer should also be checked accordingly.
Galvanized steel wire rope is divided into two categories: cold galvanized steel wire rope and hot galvanized steel wire rope.
Hot-dip galvanizing and cold-galvanizing have a fundamental difference in the process. Hot-dip galvanizing is the formation of a coating by physical thermal diffusion. First, iron-zinc compounds are formed, forming a pure zinc layer on the surface of the iron-zinc compound. While the highest value of zinc on hot zinc plating, but also 593g / m2. Hot galvanized will reduce the mechanical properties of steel wire, requiring high strength and high corrosion resistance of galvanized steel wire rope, and more use of galvanized steel wire twisting. Hot-dip galvanized is zinc plated in 450-480 degrees molten zinc solution.
Hot galvanized steel wire rope is the market trend, will become the preferred galvanized steel wire rope users. Because the hot-dip galvanized steel wire rope has a high cost. Hot-dip galvanized steel wire rope is formed by the physical diffusion of heat to form a coating, the first formation of iron-zinc compounds, one by one in the galvanized steel wire surface of a zinc compound to produce pure zinc layer. While the highest value of zinc on hot-dip galvanized steel wire is also 593g / m2. Hot-dip galvanized is zinc plated in 450-480 degrees molten zinc solution.
Hot-dip galvanized steel wire rope and cold galvanized steel wire The essential difference is: hot-dip galvanized zinc layer and cold galvanized compared to zinc-iron alloy layer, corrosion resistance better. Hot-dip galvanized steel wire rope surface because the hot-plated zinc-iron alloy, so his color to black. And the plating surface is not a chemical reaction, or the true color of zinc, looks relatively bright. Under normal circumstances, hot-dip galvanized zinc layer to be thicker, better corrosion resistance. Galvanized zinc layer is relatively thin, poor corrosion resistance.