Electroplating encyclopedia

Correct addition method of cyanide-free alkaline zinc plating brightener when opening the cylinder

2022-03-22

    We all know that cyanide-free alkaline zinc plating brightener can obtain a zinc coating with dense crystals, good brightness, dispersing ability and deep plating ability.How to correctly add cyanide-free alkaline galvanizing brightener when opening the cylinder?

      Bigolly Technology made an analysis based on the field experience and the characteristics of the product's cyanide-free alkaline zinc plating brightener BZ-515,The correct way to add brightener is:

    1. Pour the calculated amount of sodium hydroxide into the plating tank, pour 1/5 of the total volume of water, and quickly stir to dissolve.Sodium hydroxide should use a solid base with a purity of more than 98%.

    2. Make the calculated amount of zinc oxide into a paste with a small amount of water, gradually add it to the lye solution under constant stirring, stir until it is completely dissolved, and then dilute the plating solution to the total volume.Zinc oxide should use industrial grade products with a purity greater than 98%.Zinc oxide should use industrial grade products with a purity greater than 98%.


    3. When the plating solution is cooled to below 40℃, add 2-3g/L of zinc powder to the plating solution, stir well for 15-20min,If there is no zinc powder, it can be replaced with 0.2g/L sodium sulfide, but it should be dissolved and diluted several hundred times first, then add the plating solution while stirring, and let it stand for 4-8 hours and then filter by siphon.

    4. The treated plating solution is completed. At this time, an appropriate amount of cyanide-free alkaline zinc plating brightener should be added to the Hull tank to test the test piece.Make sure that the brightness and position of the test piece are normal, only then can a calculated amount of cyanide-free alkaline zinc plating brightener be added to the plating solution, and the trial production can be started after stirring evenly.

    This is the correct way to add cyanide-free alkaline zinc plating brightener when opening the cylinder.If you are interested in alkaline zinc plating brightener, please contact Bigolly customer service to get free samples and detailed technical information!

    If you want to know more about zinc plating, you can check "Electroplating encyclopedia".