TRIPLE - S 747
Super Bright Acid Zinc

DESCRIPTION:

Triple-s 747 super bright acid zinc process contains no ammonium salt or chelating agents. It produces brilliant ductile deposit over a wide range of current densities.

ADVANTAGES:

• Excellent brilliance.
• Fast brightening action.
• Excellent ductility.
• Contains no ammonia or cyanide.
• Excellent throwing power.
• Plates directly on all base metals.
• High tolerance to iron.
• Increase production rate, operating with 90-100% cathode efficiency.
• Exceptionally accepts blue and iridescent chromating.
• Low cost for neutralization of waste disposal.

SOLUTION COMPOSITION:

RECOMMENDED PROCESS CYCLE:

• Soak clean.
• Water rinse.
• Anodic clean (50 to 100 A/sq. ft.)
• Thorough water rinse.
• Hydrochloric Acid 50% by volume.
• Thorough water rinse.
• Triple-s 747 super bright acid zinc.
• Chromate blue or iridite.
• Warm water rinse and dry.

FILTRATION:

Filtration is normally recommended with the acid resistant filters.

ANODES:

Especially high grade zinc bar anodes in Titanium baskets may be used.

ANODE BAGS:

Single layer polypropylene or dynel bags are recommended for rack applications. Most barrel installations do not require bagged anodes.

AGITATION:

Cathode rod agitation is suitable for rack applications.

TANK:

P.V.C. Neoprene or rubber lined tanks are satisfactory.

HEATING:

Heating is not generally required, in cold weather below 55º F. It would be advisable to raise the temperature to 60º-65º F. with a quartz or titanium immersion heater.

MAKE UP:

1. Add 3/4 of the tank volume of warm D.I. water to a thoroughly cleaned and lined tank.
2. Dissolve the necessary Boric Acid, stirring vigorously until the Boric Acid has dissolved.
3. Add zinc chloride powder or conc. liquid, continuing to stir the solution.
4. Slowly add potassium chloride technical grade, and mix until the salts are completely dissolved.
5. Adjust the level of the solution with D.I. water and add 4% Triple-s 747 carrier and 0.2% brightener while mixing continuously. (carrier should be dissolved in equal volume of water before adding to solution.)
6. Check pH and adjust it if necessary, with Hydrochloric Acid or Potassium Hydroxide to adjust the pH to 4.5.

CURRENT DENSITY:

With a good cathode agitation, rack installations can operate as high as 40 ASF, which generally requires a tank voltage of approximately 3 volts. In barrel plating, the current used in the barred can vary from 8 to 15 ASF., with a voltage of 6 to 8 volts.

pH:

The pH of the solution should be 4.5 to 5,5. If necessary, pure Hydrochloric Acid can be used to reduce pH and pure potassium Hydroxide can be used to raise pH.

BRIGHTENER ADDITIONS:

Triple-s 747 carrier, is a grain refiner and should be added to replace drag out losses. Add 747 carrier at the rate of 1 quart per 10,000 ampere hours of operation.
Triple-s 747 Brightener, acts as a leveler and brightener and should be added 1 quart for every 10,000 ampere hours. Avoid excessive additions of brightener which may cause brittleness.

IRON CONTAMINATION:

Due to the acidic nature of the solution, iron will tend to build up in the solution and should be removed so that it does not affect brightness of the deposit. Iron is precipitated by adding diluted 30% Hydrogen peroxide at the rate of 2 ml. per liter. The precipitated iron Hydroxide must be removed by continuous filtration to avoid deposit roughness.

CONVERSION OF EXISTING BATHS:

Most of the existing potassium chloride baths are converted successfully by adding Triple-s 747 carrier and brightener instead of the old brighteners. Since the bath composition and its impurities are very important, it is recommended that a 1 gallon sample of the solution be sent to our laboratory for our complete analysis and recommendations.

WASTE TREATMENT:

To remove zinc metal from waste solution, simply raise the pH to 8.5 - 9 by adding caustic soda to the solution, this will precipitate zinc as a Hydroxide sludge which can be removed by filtering the solution or by allowing the sludge to settle and decanting the liquid off the sludge.

PRECAUTIONS:

Liquid causes severe eye irritation. Do not get in eyes. Keep away from heat and sources of ignition. Avoid prolonged or repeated contact with the skin. Avoid prolonged breathing of vapors. Use only in well ventilated areas.

SUGGESTED FIRST AIDS:

Eye contact: Immediately flush eyes with plenty of water for 5 minutes. Call physician. Skin Contact: Wash with soap and water. Inhalation: Remove individual to uncontaminated area.

The information stated herein is based on information and tests we believe to be reliable. The accuracy or completeness thereof is not guaranteed. Since conditions of use are outside our control, user shall, before using, determine the suitability of the product for his intended use and user assumes all risk and liability in connection therewith.