Aluminum manhole covers hermetic and reversibles
They are suitable for indoor installations and outdoor garden areas, (for the protection of electrical and recordable connections
and other complementary options such as the pocerias sector)Available in sizes from 20cm x 20cm to 100cmx100cm in reversible format.
In general, aluminum resists corrosion well in the following media: NH4OH, acetic acid and many organic acids, fatty acids, nitric acid >80%, distilled water, non-marine atmosphere, sulfur and sulphurous atmospheres and sulphurous refrigerant gases.
The same does not happen with materials such as galvanized or PVC or with manhole covers made with aluminum profiles that rust much faster because the natural protection against aluminum corrosion has already been broken in previous cutting and welding systems.
Only traditional sand casting maintains integrates the physical properties of the molten alloy.
Our manufacturing process of Molding on land you need a mixture of characteristics and properties necessary to obtain a solidified casting of high quality.
This mixture normally contains siliceous sand (silica or quartz) in a high percentage and binders such as clay (commonly bentonite) and a certain percentage of moisture.
Often the natural anti-corrosive abilities of aluminum and its alloys to protect against damage are not enough.
A long period of operation of products from these metals, without fail, will require the use of additional protection methods. The most common methods for protecting metals from corrosion include:
- A) Anodizing oxidation (studies carried out by German experts show that this type of protection is used for 15% of the total production of construction profiles in the world)
- B) Coating the surface of metals with powder compositions;
The most powerful solvents are fluorine,potassium and sodium.In addition,aluminum is characterized by a fairly low resistance to chlorine and bromine compounds.Very aggressive for various aluminum metal alloys, are lime and cement mortars.
Delivery time throughout the European region from 1 to 4 working days maximum with the DHL agency.
Physical properties of aluminum:
- Aluminum is a chemical element, with symbol Al and atomic number 13. It is a non-ferromagnetic metal.
- It is the third most common element found in the terrestrial crust.
- Aluminum compounds make up 8% of the earth’s crust and are present in most rocks, vegetation and animals.
- In the natural state it is found in many silicates (feldspar, plagioclase and micas).
- As the metal is extracted only from the mineral known as bauxite, it is first processed into alumina by the Bayer process and then metal aluminum by electrolysis.
- This metal has a combination of properties that make it very useful in materials engineering, such as its low density (2700 kg / m³) and its high resistance to corrosion.
- Suitable alloys can significantly increase their mechanical strength (up to 690 MPa).
- It is a good conductor of electricity and heat, it is easily machined and very cheap.
- For all this, since the middle of the XX century, the metal most used after steel.