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Backed with the support of our team of professionals with
sound knowledge about chemicals, we are counted amongst the foremost manufacturers
and suppliers of Chromate Coating
Chemicals. These chemicals have unique self-healing characteristics. Metal coated
with these chemicals when get exposed from a scratch gets covered by soluble
chromate from other areas adjacent to the scratch. All these chemicals are highly
renowned in the market for their purity, precise pH value and longer shelf
life. Available in air tight packaging, these Chromate Coating
Chemicals retain their
quality for longer duration.
Further Details Kemchrome-340(Chromate Coating Chemicals) specially formulated for the treatment of Aluminium and its alloys by immersion method. Kemchrome-340 gives a thin, smooth amorphous oxy-chromate coating, which is normally rainbow in nature of golden brown in colour. This coating is an excellent base for paint. This is also coated to avoid white rust on aluminium. Product Specifications a. Colour Golden Yellow Liquid b. Chemical Composition Blend of chromium and additives c. Odour Slightly Pungent d. Foaming Tendency Nil e. Reliability Good f. Handling Avoid Skin & Cloth Contact g. Solubility Nil h. pH Acidic Range I. Toxicity Moderate j. Flash Point Nil k. Pollution Hazard Highly Hazardous Product Operating Data Concentration 3 - 5% Dip Time Temperature 2 - 5 min Temperature Room Pointage T.A. F.A. 9 -14 ml 4 - 6 ml Product Operating Procedure DegreasingPrior to Kemchrome-340 dip job to be properly degreased either by chlorinated vapour degreasing method or by caustic free degreasing solution. RinsingRinsing should follow degreasing, job should be properly washed with running water by dip or spray method. ChromatisingAfter water rinse the job should be dipped in 3-5% of Kemchrome-340 solution for desired coating. Water RinsingJob should be rinsed properly. DryingAfter water rinsing, job should be properly dried by hot air blowing. 5.0 Product Application EquipmentsS. S. tank of 3-4 mm thickness. Testing and Control Procedure:Free AcidityPipette out 5 ml of bath solution in a conical flask, add 4-6 drops of Bromocresol green indicator. Titrate it against N/10 NaOH solution. The consumption of N/10 NaOH in burette will give the free acidity of the solution. Total AcidityPipette out 10 ml. of bath solution in a conical flask. Add 50 ml of D.M. Water and 10 ml of phosphoric/sulphuric acid mixture. Add 1- 2 gms. of Potassium Iodide powder. Mix it thoroughly, add 15-20 drops of starch solution indicator. Titrate it against N/10 Sodium Thiosulphate. Colour of the solution will change from black to green. The consumption of N/10 thiosulphate I burette will give the total acidity of the solution. Chemical ReplenishmentAdd 2.6 Ltr. Of Kemchrome-340 for every 100 ltr. Of water to raise the acidity pointage by 1. based upon organic compounds. Safety MeasuresKemchrome-340 is based upon organic compound so while handling proper care should be taken. Protect eyes and skin by means of goggles, gloves etc. If it comes in contact with skin and eyes wash thoroughly with flush of water and get medical advice.