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?
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.