The main factors causing metal rust: relative humidity of the atmosphere at the same temperature, the percentage of water vapor content and water vapor saturation content in the atmosphere, known as relative humidity. Under certain relative humidity, the corrosion rate of metal antirust oil is very small, but higher than the relative humidity, the corrosion rate increases suddenly. This relative humidity is called the critical humidity. When the humidity in the atmosphere is higher than the critical humidity, the metal surface will appear water film or water droplets, if the atmosphere contains harmful impurities, dissolved in the water film, water droplets, electrolytes and aggravate corrosion.
Strictly control the pH value of large roll galvanized wire bath, research shows that the size of the bath pH value directly affects the quality of steel wire coating, improper control of pH value will cause loose coating. When the pH value is greater than 3, the steel wire coating has burr caused by fine dendrites, and the surface is not smooth. The current density is strictly controlled. From the microscopic morphology, the higher the current density, the larger the zinc layer grain deposition, the less dense the corresponding zinc layer.
Temporary rust prevention is to prepare for the completion of the mission of the protective layer to be removed. The methods include: cajoling corrosion inhibitors, coating antirust oil, peeling molecular compound plastics, drying air, vacuuming, etc. Change the internal structure of the metal: new chromium, nickel and other alloy elements made of stainless steel, but the alloy is not much, expensive, difficult to produce widespread application.
What are the differences between the hook fence net production plant used on the highway? The guest soil of galvanized zigzag net creates favorable conditions for the growth of vegetation on the slope. Its composition varies with the growth conditions of plants on the slope. According to the side slope rate, geological conditions, temperature, precipitation and other characteristics of reasonable selection of net types, galvanized hook mesh on the slope vegetation protection effect will be better. Highway and railway galvanized hook mesh, through the vegetation developed root system and mesh body closely combined, to achieve the purpose of protection of highway slope. The guest soil of galvanized zigzag net creates favorable conditions for the growth of vegetation on the slope. Its composition varies with the growth conditions of plants on the slope.
Now large roll galvanized wire in our life the use of more and more, to galvanized wire products bring a great market, galvanized wire products are more and more types. The surface coating of good quality galvanized wire is continuous and smooth. When the plating parts are installed and combined, there can be no flow hanging, slag or drop remaining, and no surface defects such as iron exposure. Good quality galvanized wire, coating must be uniform, roughly uniform in copper sulfate solution soaking five times without exposing iron. And with hammering test does not bulge, do not fall off. This is a good galvanized wire should have characteristics.
1. Simple grid structure, beautiful and practical; 2. Easy to transport, installation is not limited by terrain ups and downs; 3. Especially strong adaptability to mountainous, sloping and multi-curved areas; 4. The price is medium and low, suitable for large area. Main market: railway, highway closed network, field fence, district guardrail, all kinds of isolation network.
Cyanogen bath has alkaline zincate bath, ammonium bath, sulfate bath and ammonia chloride bath. Cyanide galvanized solution plating ability is good, the coating lubrication, in production has been selected for a long time, steel mesh chromium plating: chromium plating layer has a high hardness, according to the bath composition and process conditions are different, the hardness can be changed in a large scale 400~1200HV.
The spring steel wire is made of high carbon and high quality carbon structural steel or carbon tool steel wire rod, and its chemical composition, gas content and non-metallic inclusion must be strictly controlled according to the use of the spring. In order to reduce the appearance of shortcomings and decarbonization layer, the consumption of rod billet to stop surface grinding, if necessary, but also stop peeling.