What you need when passivating and brightening electroplated zinc workpieces

27 Mar.,2025

What you need when passivating and brightening electroplated zinc workpieces

 

What you need when passivating and brightening electroplated zinc workpieces
 

Author: Robby


After galvanizing the product 2% nitric acid out of the light, immersion blue and white passivation solution passivation, cleaning hot water washing, wrestling (baking) dry. 

Market blue and white passivator ready-made products can be purchased. Such as Hangzhou Oriental Surface Technology Co., Ltd. hexavalent chromium passivate P-Z2 trivalent chromium passivate P-Z10. preparation:

(1) hexavalent chromium passivation solution P-Z25g / l, reagent nitric acid 20ml / l, time 5-10 seconds;

(2) trivalent chromium passivation solution P-Z10 50ml / l pH = 2 or so, 10 - 30 seconds. 30 seconds.

 

The cost of hexavalent chromium passivation is lower than trivalent chromium passivation, but the lanthanate and anticorrosion are not as good as trivalent chromium passivation.