What should we do if the stainless steel manhole cover is rusted? We can use the method of projectile rust removal. Projectile rust removal is the high-speed operation of the impeller blades of the shot blasting machine. The abrasive is scattered and sprayed on the surface of the stainless steel manhole cover . The abrasive will fly out at high speed, and then impact and conflict with the appearance of the stainless steel manhole cover. Then remove the stainless steel manhole cover. Rust and scale. This projective rust removal method has high power and good rust removal quality, and can also make the appearance of stainless steel manhole covers have a certain degree of roughness and adhesion of paint film. The intensity of labor is low and the pollution to the environment is light. I initiated the production plant to choose this method first.
In addition to the method of ejecting and removing rust, the method of removing rust from stainless steel manhole covers also includes the method of erupting and removing rust. The method to erupt the rust is to use compressed air treated with oil-water separation to spray the abrasive from the nozzle at a high speed. The pressure of the compressed air is generally 仉 4-0.6MPa. The use of high-speed abrasive with pressure and the stainless steel manhole cover conflict. And impact to get rid of scale and rust. This method does not require a fixed address, high power, flexible eruption points, no dead ends, and good rust removal quality. Together, the stainless steel manhole cover can achieve a certain roughness to facilitate the adhesion of the paint film.
For stainless steel manhole covers, if the problem of rust appears, you can choose the method of descaling by ejection or rusting, which will have a good effect.
First, in order to maintain the appearance of the well cover, the surface pattern and the handwriting are clear, during the construction of the asphalt pavement, a thin iron sheet should be used to cover the well cover or the cover surface should be brushed with waste engine oil to prevent asphalt oil from spraying directly on the well cover. During the construction of cement pavement, cover the manhole cover with plastic film to prevent the cement slurry from contaminating the surface and damaging the surface pattern and handwriting. The surface of the well cover can also be cleaned with water at the end of the construction day.
2. After the manhole cover is cast or asphalt paved with concrete, the manhole cover should be opened and cleaned in time to prevent mortar or asphalt from pouring the inspection manhole cover and the well base into one, so as not to affect the future opening.
3. The masonry building of the manhole cover shall ensure its inner diameter or length × width and square according to the size of the manhole cover designed by the design institute (if it is better to be constructed according to the actual sample), and it may also be implemented by referring to the corresponding standards.
4. When installing the well seat on the road surface, use a C25 concrete to cast a 20cm thick ring beam on the brickwork of the well to smooth it. Be sure to keep the well square solid, flat and not loosened, and cast the width of the outer ring of the manhole cover. The concrete protection ring smaller than 40cm is reinforced with steel bars, and the maintenance period should be more than 10 days.