E-Brite 2.0 Ag RTP: Non-Cyanide Alkaline Silver Plating

E-Brite 2.
0 Ag RTP
Non-Cyanide Alkaline Silver Plating
E-Brite 2.0 Ag RTP is an alkaline, cyanide free plating solution, which can plate bright silver for
brush, electronic, industrial and decorative uses. E-Brite 2.0 Ag RTP eliminates the high cost of
waste treatment of cyanide. It operates at room temperature and can be utilized in both rack, barrel
and brush plating.
E-Brite 2.0 Ag RTP can plate directly on silver, brass, bronze, nickel and copper and does not
require a separate silver strike on these substrates. E-Brite 2.0 Ag RTP has exceptional covering
and throwing power. It produces fine-grained, smooth, dense, hard silver plate with low porosity
and excellent bonding properties. The plate may be buffed for a high luster.
It exhibits superior color of a brilliant white. It is cost effective because it plates out of the silver
anodes rather than the solution. E-Brite 2.0 Ag RTP is easy to maintain with a single
maintenance additive. E-Brite 2.0 Ag RTP meets ASTM B-700.
It is a very stable bath.
Plating Specifications:
Optimum Range
Silver Metal 1.5 oz/gal 1.0-2.0 oz/gal
pH 10.0 9.5-10.5
Temperature 68F 60-75F
Cathode current density 3 - 10 2-20 ASF
Anode current density -- 2-10 ASF
Agitation Cathode rod agitation or air agitation on the cathodes.
Equipment and Operation:

Anode Pure silver anodes should be used.
Anode/cathode ratio A 2:1 anode to cathode ratio is required. Calculate the maximum
cathode area before setting up the process and ensure the anode
area is two times the maximum cathode area.
Filtration The solution must be kept free of suspended matter in order to

prevent roughness. Continuous filtration with 1 micron filter is
recommended. New filter cartridge must be flushed prior to use by
circulating DI water through the cartridge.
Tank Plastic tanks may be used. Large polypropylene tanks must be

reinforced. A high volume, low pressure air source is required for air
agitation of the anodes and cathodes.
Cooling: In hot climates or manufacturing facilities, a cooling system using a 304/316
stainless cooling coil will extend the bath life. A water or chiller cooling system is preferred.
In some locations, a cooling coil fixtured in the DI Water rinse with the silver bath flowing
through (utilizing the filtration system pump) can be used to keep the bath at 68°F (20°C).
Warning: Tanks, racks, filters, barrels and other equipment must be thoroughly cleaned
before using them with an E-Brite 2.0 Ag RTP solution. Equipment previously used for
cyanide silver should be washed with hypochlorite solution and the tank soaked for 24 hours
in 2% hypochlorite to destroy residual cyanide. After removal of the hypochlorite solution
and water rinsing, a 5% sulfuric acid or nitric acid rinse should be used, followed with
another rinse with DI water. When destroying cyanide, forced ventilation should be used at
all times to prevent toxic cyanide fumes from accumulating. Personnel should be equipped
with self-contained breathing apparatus.
Best results are obtained with a new tank or by installing a new flexible liner in a tank which
previously contained a cyanide silver solution and which has been cleaned as outlined
above. New anodes and baskets are also recommended.
pH control for E-Brite 2.0 Ag RTP solution

It is very important to operate E-Brite 2.0 Ag RTP at pH range 9.5 to 10.5. If pH is below
9.5, adjust with KOH. If pH is over 10.5 adjust with 50% nitric acid. The pH must not go over
11.5.
E-Brite 2.0 Ag RTP bath control

The bath is maintained by measuring the pH, by titrating the silver concentration, and by
running Hull Cell panels to determine contamination and evaluate plate adhesion.
Silver Analysis
1. Pipette a 10 ml sample of the plating solution into a 250 ml Erlenmeyer flask. Add 50 ml distilled
water.
2. Add 2 ml concentrated nitric acid and 2 ml of 98% H2SO4. Heat up solution and boil for 5 min.
3. Wait until the solution cools down and add 5 ml of 2% ferric ammonium sulfate solution.
4. Titrate with standard 0.1 N potassium thiocyanate (KSCN) solution until the light orange color
remains.
5. oz/gal silver metal = (ml of KSCN) x 0.144
Cleaning Parts
It is extremely important to evaluate the cleaning in the existing line in order to have good
performance for the E-Brite 2.0 Ag RTP process. EPi has electrocleaners as well as acid
salts that are compatible with the E-Brite 2.0 Ag RTP solution.
Plating copper, brass and bronze substrates
1. Soak clean with EPi’s E-Kleen 153 or E-Kleen 196

2. Electroclean with EPi’s E-Kleen 153
3. Cold water rinse
4. Activation with EPi’s E-Pik 219
5. Cold water rinse
6. Cold water rinse
7. Plate with E-Brite 2.0 Ag RTP
8. Silver drag out (D.I. Water)
9. Cold water rinse (tap water)
10. Cold water rinse (D.I. Water)
11. A 10% Sulfuric Acid rinse
12. D.I. water rinse
13. EPi’s E-Tec 529 anti-tarnish solution** or EPi’s B.P.A. electrolytic chromate
solution
14. Hot D.I. water rinse
15. Dry
Plating Steel Substrates
1. Soak clean with EPi’s E-Kleen SR 102-E
2. Electroclean with EPi’s E-Kleen SR 1020
3. Cold water rinse
4. Activation in 50% HCl or 5-20% Sulfuric Acid
5. Cold water rinse
6. Cold water rinse
7. Copper strike with EPi’s E-Brite Ultra Cu non-cyanide alkaline copper
8. Cold water rinse
9. Cold water rinse
11. Silver drag out (D.I. Water)
13. Cold water rinse(D.I. Water)
14. A 10% Sulfuric acid dip
15. D.I. water rinse
solution
17. Hot water rinse
18. Dry
Plating Fresh Nickel: Electroless and Electroplated Nickel Substrates (Woods &
Sulfamate Nickel)
1. Cold water rinse
3. Silver drag-out (D.I. Water)
5. Cold water rinse (D.I. Water)
3
6. A 10% Sulfuric Acid dip.
7. D.I. water rinse
solution
9. Hot water rinse
10. Dry
Note: E-Brite 2.0 Ag RTP contains silver in solution and therefore Section 313 of the
Federal Emergency Planning and Community Right-To-Know Act, which pertains to
reporting, must be adhered to.
**For tarnish protection on plated silver, be sure to use the heated E-Tec 529 solution
at 25% by volume.
Further protection from tarnishing of silver parts can be accomplished by wrapping

them in Silver Saver Volatile Corrosion Inhibitor (VCI) paper available from Daubert
Cromwell:
phone 800-535-3535 or website www.daubertcromwell.com
Caution
There is the possibility of chronic health effects with E-Brite 2.0 Ag RTP. The absorption of
silver compounds into the circulation and the deposition of reduced silver in various tissues
of the body may result in the production of generalized grayish pigmentation of the skin and
mucous membranes (argyria). Generalized argyria develops after 2 to 25 years of
exposure. Ingestion is harmful and may cause death.
Packaging
One (1) gallon, five (5) gallon pails and 55 gallon drums
IMPORTANT NOTICE! For Industrial Use Only

The following is made in lieu of all warranties, expressed or implied, including the implied
warranties of merchantability and fitness for purpose: seller’s and manufacturer’s only
obligation shall be to replace such quantity of the product as proved to be defective. Before
using, user shall determine the suitability of the product for its intended use, and user
assumes all risk and liability whatsoever in connection therewith. Neither seller nor
manufacturer shall be liable either in tort or in contract for any loss or damage, direct,
incidental or consequential, arising out of the use or the inability to use the product.
02/09/21

E-Brite 2.0 Ag RTP: Non-Cyanide Alkaline Silver Plating

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E-Brite 2.

Equipment and Operation:

Filtration The solution must be kept free of suspended matter in order to

Tank Plastic tanks may be used. Large polypropylene tanks must be

pH control for E-Brite 2.0 Ag RTP solution

E-Brite 2.0 Ag RTP bath control

1. Soak clean with EPi’s E-Kleen 153 or E-Kleen 196

Further protection from tarnishing of silver parts can be accomplished by wrapping

IMPORTANT NOTICE! For Industrial Use Only

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