Lead Free Cationic Electro-Deposition for Automobile Body in White

Performance of Bismuth Oxide in the Cathaphoretic Epoxy Primers

“…To achieve this goal, pigment containing bismuth such as Bi 2 O 3 , Bi(OH) 3 as a substitute have been incorporated in order to compensate for the loss of the these functions in existing lead-free cataphoretic electrocoat. But Bi 2 O 3 has been widely used commercially, there have been very few reports of its effects in the epoxy primers [1,5]. In this study, we evaluated anti-corrosion property and accelerated curing property of epoxy primers by using Bi 2 O 3 for automotive substrate before applying to actual painting lines by cyclic corrosion test, IR analysis and rub test with methyl ethyl ketone.…”