How to construct chimney beautification and anti-corrosion? What method is used for anti-corrosion coating?

Chimneys are generally made of cement and bricks, so the color of the surface is relatively dark, and the surface of the chimney will appear sanding and peeling after a long time of use. At this time, if you want to beautify the chimney and prevent corrosion, So how to construct chimney beautification and anti-corrosion? What method is used for anti-corrosion coating? Next, we will take a closer look at:

How to construct chimney beautification and anti-corrosion

1. When beautifying the surface of the cement chimney that has been used for a long time, the method of "sandblasting" can be used. The process conditions and criteria for sandblasting of concrete surfaces are different from those of steel. Due to the low mechanical strength and large transformation of the concrete surface, it is usually necessary to conduct field tests.

2. Dry sand can be used for sandblasting of cement surface, but more environmentally friendly wet sandblasting is used. Sandblasting can remove the weak interface layer and dirt on the surface, and open the buried holes on the surface to make the surface have the same roughness. The treated surface can reach the form of sandpaper with medium fineness. If the sand or stone aggregate is exposed, the footnote is too much.

3. The repair of chimney beautification and anti-corrosion surface defects is to remove the burrs, and use cement mortar, polymer-modified mortar, putty, two-component epoxy mortar, etc. to fill in the cracks, holes, pits, etc. on the surface to get a flat surface. s surface. Depending on the surface morphology, it can be implemented by wiping, scraping or spraying. For wider cracks, the "V" groove must be polished with equipment to ensure the quality of the repair. The method of chimney beautification anti-corrosion coating

1. Air spray method: When spraying, the angle and interval (30-50cm) between the spray gun and the surface to be coated should be formed. When the spray gun is moved by the height control, the distance between the spray holes and the coated surface should be kept fixed, and should not be moved in an arc. Welds, rivet heads and corners should be pre-coated first

2. Brushing method: When used for paint brush painting, the painting target should be painted with the target of the first height and then the control, and the paint brush should not be dipped in too much paint to prevent dripping. When applying anti-corrosion paint, the interval between paint brushes should not be pulled too far to avoid the paint film being too thin. In case of surface roughness, edges, corners and protrusions, special attention should be paid, and you may wish to pre-coat it first.

3. Roller coating method: When coating with a roller, the paint dipped on the roller should be evenly dispersed. When painting, the tumbling speed should be maintained, not too fast.