Derusting treatment on the surface of plastic coated carbon steel pipe inside and outside:

Since the surface of the pipeline will inevitably appear oxides, rust, burrs, turbidity and dust during the manufacturing and transportation process, surface treatment should be carried out before anti-corrosion construction to improve the quality of paint coatings and other anti-corrosion coatings. Adhesive strength of the base layer.

Internal and external plastic coated carbon steel pipe mechanical rust removal machine

The mechanical derusting method is to use mechanical methods to peel off the surface oxide layer, such as polishing on a polishing wheel, polishing on a polishing machine, or manually brushing and polishing with tools such as wire brushes, sandpaper, and whetstone; thick oxide skin Can be turned with a lathe.

The mechanical rust removal methods for internal and external plastic-coated carbon steel pipes mainly include manual rust removal, semi-mechanical rust removal and sand blasting.

1. Manual rust removal

Artificial rust removal is to remove rust on the surface of the pipeline manually with simple tools such as sharp knife hammer, scraper, spatula, wire brush, emery cloth. Because this method is manual operation, the work efficiency is low, and the rust removal is not clean. It is only suitable for surface rust removal with relatively small parts and less workload or local rust removal in places where mechanical rust removal is not clean.

2. Semi-mechanical rust removal

Semi-mechanical rust removal refers to the manual use of wind (electric) grinding wheel, wind (electric) wire brush wheel and other machinery to remove rust, which is suitable for small areas or occasions where mechanical rust removal is not easy. The quality and efficiency of semi-mechanical descaling are higher than manual descaling.

3. Sandblasting and rust removal of internal and external plastic-coated carbon steel pipes Sandblasting and rust removal is to use compressed air or centrifugal force as power to spray hard abrasives to the surface of the substrate at high speed, and to achieve the purpose of rust removal through the scouring effect of abrasives on the surface. The surface of the workpiece after sandblasting is not very smooth, so sandblasting is suitable for general workpieces except precision workpieces and workpieces with special requirements. In practical applications, sandblasting is especially suitable for the pretreatment of the surface to be coated, as well as for surface pretreatment such as oxidation and phosphating as the bottom layer of the coating. The method has high working efficiency and good rust removal, the rust removal level can reach Sa2.5-Sa3 level, and the work intensity can be reduced. Using this method to remove rust, the surface is rough after rust removal, which is beneficial to improve the adhesion of the coating film or coating; but the sand particles splash, causing environmental pollution.