Several anti-corrosion treatments for color steel fence manufacturers on construction sites

Several anti-corrosion treatments for construction site color steel fence manufacturers

Construction site color steel fence manufacturers are steel products, and they are often exposed to rust for a long time. Today, let's talk about the anti-corrosion treatment of color steel fence.

1. The galvanizing process methods in the construction site color steel fence manufacturers include electroplating, hot-dip galvanizing, powder plating, etc. At present, hot-dip galvanizing is mostly used. The life of hot-dip plating is longer than that of electroplating, and the powder is more suitable for objects with irregular surfaces such as bolts and connectors. The galvanized anti-corrosion method works well in dry climates, but has poor corrosion resistance to acid, alkali and salt, and has a short life in humid and rainy areas such as coastal areas. The advantage of galvanizing is that the galvanized layer is firmly combined with the metal substrate, and the coating is wear-resistant and impact-resistant. In the 'Technical Conditions of Isolation Barrier' (JT/T374-1998), the galvanized adhesion of the expanded metal mesh is required as follows: when the plate thickness is 4.0mm, the average quality of the zinc layer is 135g/m2. 270g/m. (Heavy industries, cities, coastal areas and other areas with more severe corrosion take higher values).

2. The quality of the zinc layer of the diagonal bracing should not be lower than 450g/m. The galvanized layer generally lasts for 35 years. Plastic spraying: Plastic spraying is to use an electrostatic generator to form an electrostatic field between the metal surface and the plastic particles, adsorb the plastic powder on the metal surface, and form a protective film after plasticization. The spray is made of thermosetting material. Such as epoxy resin, phenolic resin, etc., the coating is thin (thickness 0.07-0.2mm), the coating without modification treatment is generally brittle after curing, and it is easy to peel off into flakes after collision, and it has outdoor anti-corrosion performance. Slightly worse, with a lifespan of 1 to 3 years.

3. Reinforcement mesh dipping: dipping is to preheat the metal components and immerse them in the plastic powder in a fluidized state, and use the heat of the metal components to make the powder evenly adhere. On the surface of the component, further heating makes the powder fully melt and level, and a smooth plastic layer is formed on the metal surface after cooling. The thickness of the plastic layer is 0.4-0.8m. Dipping anticorrosion is more suitable for humid, rainy climates. Good quality dipping products have a service life of up to 10 years.

4. Galvanized and dipped (sprayed) double-coat anti-corrosion: metal components or steel mesh are first hot-dip galvanized, with a coating thickness of about 0.015mm, and then sprayed or dipped. Using this method, in theory, the anti-corrosion effect is better than that of a single coating, but the anti-corrosion life is not multiplied, but depends on the processing technology, the thickness of each coating and the degree of tight bonding between each coating and the metal. No matter which of the above methods is used for the anti-corrosion treatment of metal enclosures, it is required that the metal components are subjected to pickling or special process treatment before the anti-corrosion coating is applied to remove the rust on the metal surface, so that the coating and the metal components can be firmly combined together. .