Recipes




 * To strip Anodic Coatings (used to verify coating weight)**


 * __To Make Approx. 2 Liters__ **
 * ACS Reagent Grade Chromic Acid Anhydride................. 40 ± 1 gram **
 * ACS Reagent Grade Phosphoric Acid............................ 70 ± 1 mL **
 * DI water...................................................................... 2 Liters **


 * //Control stripping solution temperature 212 ± 10°F, Solution should be discarded after 5 grams of anodic coating has been dissolved per liter of solution.// **


 * To strip Nickel from Brass or Copper**;

__General Recipe__ Sulfuric acid (H2SO4)................................................... 10% by volume M-nitrobenzene sulfonic acid, sodium slat (Ultrex NBS)... 5-10 oz/gal warm water.................................................................. balance

//some quick calculations// __To make 1 Liter__.........................__To make 8 gallons__ 56 grams................................. 5 lbs............................ Ultrex NBS 100 mL.................................... 3 L.............................. H2SO4 warm water.................................................................. balance

//Strip rate increases with heat however, keep temperature below 150°F (130-140°F works best).//


 * To strip Silver from Brass**;

__General Recipe__ Sulfuric acid (H2SO4)................................................... 19 parts = 95% by volume Nitric Acid (HNO3)........................................................ 1 part = 5% by volume

//**Absolutely No Water!!!** Add HNO3 to the H2SO4 Slowly!!! Use solution at room temperature.//


 * To strip Cadmium from Brass**;

__General Recipe__ Hydrochloric Acid (HCl)................................................. 50% by volume Water.......................................................................... 50% by volume

//Any acid will work & of course "do it like you otta... add the acid to the water!"//

**Olive Drab Chromate Touch-up Solution**;

__To make 500 mL__ Kenvert 11 (acidic solution)........................................... 90 mL Ammonium Bifluoride.................................................... 0.5 grams Water.......................................................................... 410 mL


 * To make pH probe descaling soln (0.1N HCl from ACS HCl)**;

__To make 1 liter__ ACS Hydrochloric Acid (HCl)......................................... 8.3 mL Water.......................................................................... Dilute to 1L

Remember: //"do it like you otta... add the acid to the water!"//

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