Precautions for cleaning and maintenance of ductile iron manhole covers. Ductile iron manhole covers are mostly used outdoors with poor sanitation conditions such as urban roads, communications, power engineering, and residential quarters. After a long period of use, the surface layer will inevitably encounter various safety hazards such as stains, scratches, and rust. Let the ductile iron manhole cover be used for a long time and the effect is obvious. Everyone must clean and maintain the ductile iron manhole cover, so that you know what are the precautions for cleaning and maintenance of the ductile iron manhole cover? What are the specific countermeasures?

Precautions for cleaning and maintenance of ductile iron manhole covers

1. Smoke and dust cleaning and maintenance

In industrial plants for manufacturing ductile iron manhole covers, there are usually a lot of dust, vermicelli and other types of smoke, which will inevitably fall on the surface of ductile iron manhole covers, causing corrosion to the manhole covers and endangering the normal operation of the manhole covers start up. If you want to remove this kind of smoke and dust, you only need to clean the surface of the manhole cover directly with water and an aqueous solution with a relatively large alkalinity. In addition, for the hard-to-remove smoke and dust dirt that has strong adhesion and cannot be removed directly, you can use the energy of high-pressure water guns and steam to clean.

2. Cover or insert fans for cleaning and maintenance

If the surface of the ductile iron manhole cover is covered or a large number of fans are placed, the rust of the fans will also cause the ductile iron manhole cover to be corroded. Therefore, those fans scattered on the surface of the manhole cover should be cleaned up in time. Just cover it with a layer of floating fans so that it can be removed along with the smoke. But if it is a fan of putting in the manhole cover, it should be solved according to the solution of putting in the iron.

3. Scratch cleaning and maintenance

If there are various scars and scratches on the surface of the ductile iron manhole cover, it is suggested that it can be solved by mechanical cleaning such as grinding and polishing, so as to avoid the accumulation of lubricating fluid or other impurities in the process, and improve the appearance and serviceability of the ductile iron manhole cover the term.

4. Rust cleaning and maintenance

When there are many rust marks on the surface of the ductile iron manhole cover, it indicates that the surface of the manhole cover has been heavily polluted by these pollutants. To remove the rust marks, we use gushing anti-rust treatment, propellant anti-rust treatment and other rust removal methods to deal with them. .

5. Disadvantages of mechanical processing Cleaning and maintenance

In the production of ductile iron manhole covers, relatively rough machining methods such as grinding will also cause defects such as unevenness, burrs, and concave grooves on the surface of the manhole cover. This shortcoming is very easy to become a breakthrough point for the manhole cover to be corroded and the accumulation of pollutants, so that the surface of the ductile iron manhole cover cannot be cleaned by pickling passivation, grinding and polishing, shot blasting, etc. If you want to solve these problems, you can remove the weld defects before welding again, and choose more fine wear-resistant materials when grinding, so that the above problems can be avoided.