Aluminum often found in electronics and optical measuring devices and in general, it is widely used because of its price and mechanical properties.
The downside of untreated, black painted or anodized aluminum arises when there’s a need in the highest possible emissivity. These are the cases where Acktar coatings are the most helpful.
Coating method | Outgassing RML (%) | Outgassing CVCM (%) | Coating thickness | Emissivity 3-10μm | Emissivity 3-30μm |
---|---|---|---|---|---|
Aluminum | 0.05 | 0 | - | - | 0.04-0.2 |
Black anodized | 0.05 | 0.7 | 20-150μm | - | 0.82 |
Painted Black | 0.2-0.5 | 2-10 | 20-125μm | - | 0.91 |
Acktar coatings | 0.2 | 0.001 | 3-10μm | >0.97 | >0.88 |