TR-128 Trivalent Chrome Irisated Passivator

Good performance, thick film, trivalent chrome zinc layer passivator film. Light irisated, multicolor passivation layer

Adjust pH value of TR-128 passivation solution by sulfuric acid and nitric acid. hours later, pH value will raise. Although pH value of new passivation solution maybe lower suggested 1.4-3.0, it can be processed, because a few 3. 2.  solution life. 1.     Suggest to immerse nitric acid before passivation, especially alkaline zinc plating, in order to extend passivation Hints eliminate iron impurities. TR-128 trivalent chrome iron inhibitor can be used for treating iron impurity. Exchanging and filtering ion resin also can Liquid inside the tube should be cleared up before putting tube part into passivation solution. constantly before passivation, reduce iron dragged in. hours, in case of solution of felling part, ensure washing well, Immersion acid liquid should be poured out and changed Be careful not to fell iron into TR-128 passivation solution. Working bath has to be cleaned at least once or twice within 8 dirtying, fading passivation film and reducing protection capability. Iron impurity has effects to all good performance trivalent chrome passivation technique, iron can result in yellowing, Iron Impurity Dry Plate  Wash  Nitric Acid bright dipping  Wash  Immerse TR-128  Wash by cool water  Wash by hot water  Standard Process TR-128=m10.1N sodium thiosulfate×0.838 Calculate: 8.     Use 0.1N sodium thiosulfate to titrate solution to clear or aqua.  starch indicator. 7.     Mix and add 10ml concentrated sulfuric acid, 1g ammonium bifluoride, 10ml 10% potassium iodide solution and 2ml 6.     Cool solution to room temperature 5.     Add 1ml Nickel Chloride solution, continue to boil approximately 2 minutes. 4.     Boiling solution approximately 5 minutes. 3.     Add 5ml 20% NaOH and 1ml 35% H2O2. 2.     Draw 10ml above diluted solution into 250ml Erlenmeyer flask. Use pure water to dilute to 100ml 1.     Draw 10ml passivation solution sample into 100ml flask. Use pure water to dilute to 100ml, mix well. Analysis Steps 50% nitric acid to adjust pH value. Titrate regularly, keep normal concentration of passivation solution, if concentration is suitable and pH is high, use a little Maintenance and Replenishment  Immersion time should be changed according to passivation solution concentration and using time.  2.0-2.5 best 20-30°C best  60s best 10% best 1.4-3.4 10-42°C 45-120s 8-12%(volume ratio)  pH  Temperature  Immersion time  TR-128 Passivation solution make-up Operation Apply to cyanide zinc plating, alkaline zinc plating without cyanide and acidic zinc plating in rack and barrel. Self-restored property is similar to hexavalent chrome's Operate in low and normal temperature, avoid conventional trivalent chrome thickness film heating, reduce the cost Compare to conventional trivalent chrome process, pH operation range is greater 1.4-3.4. Be able to be used without protector and sealant, NSS time can reach over 250 hours. trivalent passivators. Light irisated, multicolor passivation layer(yellow, green, purple, pink), very special within high corrosion resistant Good performance, thick film, trivalent chrome zinc layer passivator film. 7. 6. 5. 4. 3. 2. 1. Properties 

TR-128 Trivalent Chrome Irisated Passivator