Anti-corrosion treatment method for components of board house

Today, the editor will tell you about the anti-corrosion treatment method of the components of the prefabricated house. The pre-fabricated house adopts a light steel structure. We all know that metals are chemically unstable, and in order to stabilize them, it is necessary to inhibit their mobility in some way. In fact, we often use metal in our lives, but without exception, the surface of the metal will be coated with a special material to prevent it from being exposed to the air. But when this special material is damaged, the steel components will be corroded, so how to solve this problem? Let's find out together.

The anti-corrosion treatment of steel components is mostly done in the northern region or in a relatively dry environment when the factory is manufactured, and the dry film thickness of the primer can also be increased to 70-80 microns, and the intermediate paint can be eliminated.

Anti-corrosion treatment can be divided into rust removal→primer coating→middle layer coating→topcoating several processes to complete. According to the different uses, astronomical positions and climatic conditions of light steel structures, the anti-corrosion plan and the basic requirements of each process are determined.

The surface of the steel components treated by shot blasting (or sandblasting) should generally reach the national standard Sa2.5 level or above, and the minimum is not lower than Sa2 level. After the treatment, the components should be painted with primer and primer within 8 hours. Generally, red dandruff alkyd anti-rust primer, inorganic zinc-rich primer and epoxy zinc-rich primer are used. The best anti-corrosion primer is zinc-rich primer. Good cathode maintenance to avoid galvanic corrosion. The intermediate paint is mostly scaly intermediate paint, and the paint film pigments are arranged in layers, which can improve the shielding effect of the coating, increase the penetration resistance of water vapor and carbon dioxide, and play a role in strengthening the anti-corrosion effect. Acid-blended paints, aliphatic polyurethane paints, or epoxy topcoats and fluorocarbon paints for better corrosion resistance.

Judging from the current situation in our country, the requirements for anti-corrosion technology and the selection of materials are similar, but the quality of anti-corrosion coatings themselves is quite different. Different manufacturers of the same paint have different brands, and even the quality and price of the same brand vary greatly. Because paint manufacturers account for a large proportion of small, scattered and low-level private enterprises, and some non-standard steel Constructing production enterprises, in order to reduce costs, choose low-level anti-corrosion coatings at the expense of quality, resulting in low-quality projects.

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