720 Rule Calculator
CHEMEON’s 720 Rule calculator is powerful tool for managers, estimators and planners, as well as anodizers."The 720 Rule describes the relationship between the amount of current passed through an aluminum surface and the resultant anodic oxide thickness produced over time. It is known that 720 amp-minutes of current per square foot of load are required to produce one mil (0.001" or 25.4 microns) of anodic oxide (Westre 1997, 2017) (Westre 2000). At its most basic, the 720 Rule is a way to determine anodizing build rate, anodizing dwell time or the current density of the anodizing load when the other two parameters are known.
Dr. Sjon Westre, SVP, Technology - CHEMEON