Currently, there are two types of mgo board on the market: Magnesium Chloride Boards and Magnesium Sulfate Boards. Both are building materials based on magnesium oxide (MgO), but they differ significantly in raw materials, performance, and applications.
1. Composition of Raw Materials
- Magnesium Chloride Boards
The main components are magnesium oxide (MgO) and magnesium chloride (MgCl₂). Magnesium oxide acts as a binding material, combined with reinforcing fibers and other fillers. - Magnesium Sulfate Boards
The main components are magnesium oxide (MgO) and magnesium sulfate (MgSO₄). Magnesium sulfate replaces magnesium chloride, making Magnesium Sulfate Boards more suitable for use in humid environments.
2. Water Resistance
- Magnesium Chloride Boards
Due to the presence of magnesium chloride, these boards tend to deliquesce (absorb moisture) when exposed to water, leading to a decrease in strength. They are not suitable for prolonged exposure to moisture. - Magnesium Sulfate Boards
Thanks to the stability of magnesium sulfate, these boards have low water absorption and are more moisture-resistant, making them ideal for relatively humid environments.
3. Fire Resistance
- Both materials exhibit excellent fire resistance, as magnesium-based materials have a high melting point, offering good fire protection.
4. Corrosion Resistance
- Magnesium Chloride Boards
Chloride ions can corrode metals like steel, nails, and studs, posing potential risks when used in steel structures. - Magnesium Sulfate Boards
Free of chloride ions, these boards are more metal-friendly and exhibit better corrosion resistance.
5. Application Scenarios
- Magnesium Chloride Boards
Suitable for wall panels, ceilings, and interior wall decorations. However, they are generally not recommended for use in humid area or scenarios that require corrosion resistance. - Magnesium Sulfate Boards
Suitable for exterior walls, bathrooms, kitchens, and other humid environments. They are also ideal for applications requiring high corrosion resistance, such as certain industrial buildings.
6. Moisture Resurgence
- Magnesium Chloride Boards
In humid or rainy weather, these boards may develop surface moisture, efflorescence, or small water droplets. - Magnesium Sulfate Boards
They do not exhibit moisture resurgence under humid or rainy conditions.
In summary, both Magnesium Sulfate Boards and Magnesium Chloride Boards are fire-resistant MgO boards, but they differ in moisture resistance and corrosion properties. Magnesium Sulfate Boards are more suitable for humid environments and applications requiring corrosion resistance.
