Zinc plating deactivation liquid
A technology of passivation solution and ferric chloride, which is applied in the coating process of metal materials, can solve the problems of light color and poor surface color consistency, and achieve the effect of good color consistency and saturated color
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[0008] The present invention will be further described below in conjunction with embodiments.
[0009] The passivation solution of the present invention is composed of chromic anhydride, nitric acid, sulfuric acid, ferrous sulfate, ferric chloride, acetic acid, and water. The proportion of each component is chromic anhydride (200-220) g / L; nitric acid (24 -28)mI / L; sulfuric acid (12-18)mI / L; ferrous sulfate (6-8) g / L; ferric chloride (8-12) g / L; acetic acid 5-8mI / L; others For water.
[0010] When preparing the passivation solution, first determine the total volume of the passivation solution, and then calculate the weight or volume of each component according to the total volume, add them to the container one by one, and stir evenly.
[0011] In actual passivation, the immersion time is about 4 seconds, and the idle time is 20-25 seconds
[0012] Passivation of yellow phosphorus barrel:
[0013] 1. Use chromic anhydride 200g / L; nitric acid 24mI / L; sulfuric acid 12mI / L; ferrous su...
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