B214 is used for zinc plating passivating film sealing, to increase corrosion-proof capability of plating layer, especially when color trivalent chromate or trivalent white/blue chromate, the adhesion can be harder for passivation film. After being sealed by B214, the passivated film can pass in neutral salt fog for 120 hours in test of corrosion proof capability Features 1. Past neutral salt fog test for 120 hours, approved by China FAW Group as only trivalent passivated sealing agent; 2. B214 is free of trivalent or hexavalent chromium, and is environmental friendly sealing agent. 3. No affect on passivated film color, and corrosion proof capability can be improved.