Most Galvanizing lines have an annealing option. In order to achieve an optimal annealing performance, the galvanizing bath chemistry is modified to 0.1% Aluminum (from 0.25% Aluminum for Galvanized coatings). When converting the Galvaneal coating bath back to a Galvanizing bath, Brighteners are used to add the required aluminum content. There are two forms of Brightener Alloys: 95-5 Brightener (5% Aluminum) and 90-10 Brightener (10% Aluminum). In addition these Brightener alloys are used to maintain the aluminum content in the galvanizing bath on an on-going basis.
Chemical Analysis
| Al (%) | Fe (%) | Pb (%) | Cd (%) | Sn (%) | Cu (%) | Zn (%) |
| 95-5 Brightener (Type A3) | 4.5-5.5 | 0.02 (max) | 0.004 (max) | 0.003 (max) | 0.002 (max) | 0.03 (max) | balance |
| 95-5 Brightener (Type A4) | 4.5-5.5 | 0.15 (max) | 0.4 (max) | - | - | 0.5 (max) | balance |
| 90-10 Brightener (Type A1) | 9.5-10.5 | 0.05 (max) | 0.005 (max) | 0.004 (max) | 0.003 (max) | 0.035 (max) | balance |
| 90-10 Brightener (Type A2) | 9.5-10.5 | 0.15 (max) | 0.40 (max) | - | - | 0.5 (max) | balance |
Eastern Alloys produces a series of Brightener bar are used to modify the bath chemistry as needed by production. Please contact us to quote your Brightener bar requirements.
