If the zinc coating is good, but in 3% nitric acid when the light, the coating has dark shadow, passivation occurs when the film is brown, may be caused by foreign metal impurities such as copper or lead in the galvanizing liquid. When problems occur in the process of galvanizing large coil galvanized wire, the temperature and current density are checked first, and then the content of zinc and sodium hydroxide in the plating solution is measured and adjusted through the analysis of the plating solution. Whether DPE content is low can be determined by hull cell test.
In addition, before the wire enters the zinc liquid, a layer of insulation material containing zinc oxide reducing agent can reduce the heat loss and zinc ash floating. When the zinc solution contains 0.002%-0.005% aluminum, the brightness of the zinc layer can be increased obviously, and excessive zinc ash can be prevented from oxidation on the surface of the zinc solution.
Large hexagonal net called stone cage net, mainly used for mountain preparedness protection, hydraulic construction, etc. Small wire hexagonal net is used as a good material for culture, will twist the hexagonal net in the welding of the iron frame on the hexagonal net welding into chicken cage, pigeon cage, rabbit cage and other cage, hexagonal net is an excellent material for culture with net.
The barbed wire factory will store the blade barbed wire inventory in the appropriate place, because it understands the product characteristics.
Hot wire coating is thick, generally 30-60 microns, coating corrosion resistance is high. Suitable for outdoor work of steel parts, such as highway fence, power tower, large size fasteners and other relatively “rough” workpiece long-term rust prevention. The hot dip galvanized wire is made of high quality carbon structural steel by drawing and hot dip galvanizing. Widely used in the manufacture of wire mesh, highway protection and construction engineering. It has the characteristics of thick coating, strong corrosion resistance and firm coating. And according to the special needs of users, according to industry standards to provide various specifications of galvanized wire. C, coating uniformity: galvanized layer is basically uniform with copper sulfate solution test etched five times without exposing iron.The lighting surface of each type of shed is designed to be curved, improving the Angle of the light surface, because the lighting surface is curved, no dust accumulation, good light transmittance, high temperature in the shed, after measurement, the average temperature in the shed is 3℃ higher than the traditional bamboo pole cement column shed, the yield is increased by 15~20%, and the harvest date is advanced. The formula is scientific, the surface does not absorb moisture, do not return halogen through modification technology and scientific production process, solve the greenhouse frame rod is easy to absorb moisture return halogen, poor water resistance and easy to change the shortcomings, so that the greenhouse steel pipe in the high temperature and high humidity environment, few drops, frost phenomenon, and reduce pests and diseases.
The diameter of welded mesh wire for external walls is generally 2.2-ф4.0, and the mesh is generally 25-50.Uses: water conservancy engineering, river regulation engineering, dike engineering, ecological protection engineering, channel lining, road engineering, river bank reinforcement, ocean engineering, landscape design engineering, bridge reinforcement, railway and highway slope protection, retaining wall, ecological river bank slope regulation and other engineering.
On the contrary, the denser the ion deposition, the better the quality of zinc layer. Under the condition that the surface zinc layer is dense and bright, the quality of zinc layer per unit area should reach 80g/m2, and the process parameters should be optimized as follows: current density is 16-20A /dm2, mass concentration of zinc sulfate solution is 500g/L, and pH value is 2.5-3.0.
Galvanized hexagonal net uses: building wall fixing, heat preservation, heat insulation; Power plant piping, boiler insulation; Anti-freezing, residential protection, landscaping protection; Raise chickens and ducks, isolate chicken and duck houses, protect poultry; Protect and support seawalls, hillsides, roads, Bridges and other water and wood works.In the installation of barbed rope, it is easy to cause incomplete stretch caused by winding, and the installation effect is not very good. At this time, it is necessary to use tensioner for stretching.