DEVECO RS-528

Deveco RS-528 is a yellow, iridescent, bright chromate conversion coating for electroplated zinc and electroplated cadmium.  It produces an exceptionally bright and adherent, iridescent coating on zinc chloride plated work.

MAKE-UP AND CONTROL:

Make-up                                    1% by volume Deveco RS-528

Immersion time                          15 to 40 seconds

Temperature                              60 to 90°F

pH range                                   1.3 to 2.2

On zinc die casting, an acid dip is usually required.

The solution may be maintained at any concentration by either pH control or hexavalent chromium analysis.  However, appearance of the work will serve as a guide in making additions to the solution.  Maintain the desired color with additions of 0.2 to 0.6% Deveco RS-528, or 20% of the initial make-up additions.

ANALYSIS:

1. Pipet 4.0 mLs of the bath sample into a 250 mL Erlenmeyer flask.

2. Add about 50 mLs of DI water.

3. Add about 2 grams of ammonium bifluoride (NH4FHF).

4. Add about 30 mLs of 50% hydrochloric acid (HCl).

5. Add about 10 mLs of 10% potassium iodide solution (KI).

6. Titrate with 0.1N sodium thiosulfate to the first sign of clearing in the sample.

7. Add about 5 mLs of starch solution.

8. Continue titrating to a clear endpoint.

Calculation:     % Deveco RS-528 = mLs titrant x .25

CAUTION:

This product contains chromates and is acid in nature.  Contact of salts or solution with skin or eyes should be avoided.  In case of contact, flush contaminated area with a large amount of water.  When handling this product, protective clothing, i.e. rubber apron, gloves, boots, and goggles should be worn.

EQUIPMENT:

Deveco RS-528 solutions require polyethylene, stainless steel, or koroseal lined tanks.

Read Material Safety Sheet before using this product.

DISCLAIMER:

The information presented herein, while not guaranteed, is to the best of our knowledge true and accurate.  No warranty or guarantee expressed or implied is made regarding the performance of any products, since the manner of use is beyond our control.  No suggestion for product use or anything contained herein shall be construed as a recommendation for its use in infringement of any existing patent and we assume no responsibility or liability for operations which do infringe any such patents.  The above includes confidential and proprietary information of Deveco Corporation and is furnished to you for your use solely on products or processes supplied by us to you.

Product Data Sheet/KR024                                                                                                                                          Effective Date: 11/18/99