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.
|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.