The raw materials for ceiling has developed for several generations. Now the metal ceiling especially the aluminum ceiling is a favorable choice. Which alloys of the painted aluminum coil are chose for this application? Let’s have a look together.
The first-generation ceiling: gypsum board
The gypsum board is made of gypsum as the main material, adding fibers, adhesives, and modifier.
Pros: It is easy to shape and of low price.
Cons: It is not easy to clean, easy to change color, and of complicated installation and limited service life.
The second-generation ceiling: PVC board
The main component of PVC board is polyvinyl chloride. In the manufacturing process, some toxic auxiliary materials such as plasticizers and anti-aging agents are added to enhance its heat resistance, toughness and ductility.
Pros: It is durable, non-flammable and of bright color, high strength, weather resistance and excellent stability, strong resistance to oxidants, reducing agents and strong acids.
Cons: It is easy to corrode and oxidize, and it is not suitable for applications where aromatic hydrocarbons and chlorinated hydrocarbons are in contact. It is not environmentally friendly, either.
The third generation of ceilings: metal ceiling
Aluminum ceilings are made of color coated aluminum coil with different surface treatments.
Pros: It is of bright colors and fireproof, moisture-proof, acid and alkali resistant, oily smoke resistant, easy to clean, convenient and quick to install. It is also ECO-friendly and of high recycling value.
Cons: Its price is relatively higher.
Which alloys are used for aluminum ceiling? There are generally three kinds: Al-Mg alloy, Al-Mn alloy and Al-Mg-Mn alloy. A major advantage of Al-Mg alloy ts good oxidation resistance. At the same time, due to its high manganese content, it has certain strength and rigidity, making it an ideal material for ceilings.
The Al-Mn coated aluminum coil has slightly better strength and rigidity than aluminum-magnesium alloys. However, the oxidation resistance is slightly lower than that of aluminum-magnesium alloys.
The Al-Mg-Mn aluminum alloy contains less manganese and magnesium. Therefore, the strength and rigidity are significantly lower than that of Al-Mg alloy and Al-Mn alloy. As long as it reaches a certain thickness, it can almost meet the basic flatness requirements of the ceiling.
However, the oxidation resistance is significantly lower than that of aluminum-magnesium alloy and aluminum-manganese alloy. In addition, it is easy to deform during processing, transportation or installation.