TR-125 Trivalent Chrome Multicolor Passivator For Zinc and Zinc Alloy Plating Properties
yellow, on the contrary it is green, user can choose process condition according to different requirements of colors. The color range of this product to passivation layer is, yellow - red - green. When passivation layer is thin, it is a little application time, agitation and correct these parameters check the concentration, pH-value, temperature, carbonate) filtered by rising the pH to 3,5 (using sodium hydrogen stop it; high amounts of iron can be precipitated and find out the source of the iron getting into the bath and not correct Chromiting are working parameters of the Color corrosion protection Chromiting layer, bad pale colour of the bath is too high the content of iron in the correct the pH with nitric acid to 1.8 Action pH-value is too high Cause yellowish Chromiting layer the Chromiting layer slight white clouds on/in Phenomenon Trouble shooting Calculation: consumption in ml × 1.103 = Vol% TR-125 titrate to mazarine, then aqua. crimson or brown), use 0.1N sodium thiosulfate to titrate to yellowish, add several drops of starch solution, continue to temperature, add 40ml 17% hydrochloric acid, and add water to 150ml, add 4g potassium iodide(color change from glass to cover flask top during the time of boiling), evaporate excessive hydrogen peroxide, cool off solution to room solution at least 20 minutes (if solution is lower than 50ml in the flask during the time of boiling, stop heating, use watch place five minutes, add 5ml hydrogen peroxide once again, use watch glass to cover bottle top, place five minutes, boil few minutes, add approximate 80 ml demineralised water and 5ml hydrogen peroxide, use watch glass to cover bottle top, Process: Pipette 2 ml passivation bath into a 250 ml Erlenmeyer flask, add 20 ml 10% sodium hydroxide solution, place a solution, starch solution 1 %. Reagents: Sodium hydroxide 10 %, H2O2 30 %, hydrochloric acid conc., potassium iodide, 0.1 N sodium thiosulfate Analysis by Titration plated in alkaline electrolytes. Hints: As last step before the passivation we recommend an acid dip in 0.5 Vol% nitric acid (conc.), especially for parts TR-125 according to the throughput. Consumption: For each liter of dragged out solution, 125 ml of TR-125 concentrate has to be added; best is a dosage of Agitation: rack or (low) air agitation Heating: necessary, out of acid resistance material (e.g. Teflon, glass) Tank material: steel with heat resistant and acid resistant plastic inliner Adjust with nitric acid or nahco3 (or Na2CO3) 2.0 60°C 60 seconds 1.6-2.4 55-80°C 30-90 seconds remove ion-water pH Temp Immersion time Wash(Before dry) ATTENTION: Fill in TR-125 first and then dilute with tap water up to the final volume (hot tap water is possible). 12.5 vol% Best operation 10 vol% - 15 vol% Operation range TR-125 New solution make-up Operation and Application Indication (remove ion-water) Dry Plate zinc Wash Immerse Nitric Acid Wash Immerse TR-125 Cool water wash Hot water wash Process Sequence Comply with American GME00252 and GMW-3011 Long service life, even with feed-back of rinse-water prohibiting hexavalent chrome passivator layer Reduce the cost of disposing waste water due to trivalent solution, satisfy the environmental requirements for The passivation layer can also be dyed with organic colourings Produces coatings of a clear, green, slightly iridescent colour Exceeds the requirements for hexavalent multicolor passivator according DIN 50 021 SS Apply to zinc and zinc alloy trivalent chrome multicolor passivator process, excellent anticorrosive property Trivalent chrome passivator process without hexavalent and oxidizer, got SGS international certification
TR-125 Trivalent Chrome Multicolor Passivator For Zinc and Zinc Alloy Plating
