Dura®, Durachrome®, are trade names of Plating Resources, Inc. Copyright and all other World Rights Reserved, 1990, 1995, 2014.

 

 

 

CHROME KILL #318

Chrome Kill #318 is a powdered blend of specially designed reducing agents, surfactants and pH adjusters that is used for neutralizing chromic acid. Chrome Kill #318 has two important functions in the chrome shop:

A. For Chrome Rinsing.

B. For Chrome Spills.

Mechanism
Chrome Kill #318 reduces chromic acid to the relatively harmless trivalent form. The pH adjuster in the formulation then renders the material to a neutral state. In the neutral trivalent form, chromium is non-staining and is not considered overly harmful. The residual reducers in the formulation provide both immediate and long-term action.

Rinsing Usage
Chrome Kill #318 is used as an additive for final rinse tanks in both decorative and hard chromium plating operations. The advantages are as follows:

A. Eliminates chromium staining on parts.

B. Provides “free rinsing” and fast drying.

C. Improves waste treatment load by pre-reducing the chromium.

Parts should first be rinsed in a recovery type operation. Chrome Kill #318 is then used as the final rinsing step. The Initial addition is only 1.0 oz./gal., maintenance additions of 0.5 oz./gal. should be made as needed.The operating temperature range is 90-150 deg. F. Air or mechanical agitation is recommended. The bath, when first made up, will be clear. During use, it will take on a normal darker color. Routine additions will maintain the proper concentration of Chrome Kill #318. Any red - brown color is indicative of a full charge addition being needed, i.e.: 1.0 oz./gal. The Chrome Kill #318 bath life is extremely long. It will, however, require periodic dumping.

Chrome Spills
Chrome Kill #318 is extremely helpful in eliminating the immediate hazard involved with chrome spills. As such, it is used for floors and pits, as well as for soil contamination. The use of Chrome Kill #318, in these situations, eliminates the presence of hexavalent chromium and renders the spill much less acidic. When properly used, the material will have a neutral pH and contain only trivalent chromium.

Chrome Kill #318 is used as follows.Contain the spill and locate the source so as to eliminate further contamination. Slowly pour the Chrome Kill #318 powder onto the spill. Agitate thoroughly until a slurry is formed and all of the white powder has been consumed. The resulting color will likely be dark green. Sweep up and put into a liquid tight waste container. Be certain to use proper labeling. Notify the State Emergency Response Commission, SERC, of the spill. They will determine what further action, if any, is to be taken.

For contaminated soil, follow the same procedures except add a slight amount of water so as to activate the Chrome Kill #318 powder.

IT IS RECOMMENDED THAT ALL CHROMIUM PLANTS MAINTAIN A MINIMUM INVENTORY OF 200-300 POUNDS OF CHROME KILL #318, AT ALL TIMES, FOR EMERGENCY SPILL CONTROL.

Equipment
Suitable tank lining materials include ChemLock #200, Koroseal, polypropylene, polyethylene and 316 Stainless Steel. Heaters should be of Titanium, 316 S.S. or Teflon. Ventilation is recommended for hot Chrome Kill #318 tanks.

Disposal
All Chrome Kill #318 products, liquids and by products that contain chromium, in any form, must be disposed of by approved methods. Liquids can be handled in normal waste treatment systems. Dirt, spills and similar materials should be sent to a licensed waste handler. Follow all environmental regulations with regard to proper disposal of the product.

Caution:
This process uses industrial strength chemicals which must be handled carefully and in accordance with the directives provided in the individual MSDS forms. Read and understand the MSDS on all of these chemicals before handling or using. Ensure that all regulatory standards are followed and limit personal exposure as required for Cr(VI) and other chemicals by OSHA.

Avoid personal contact with these chemicals, avoid splashing and avoid breathing any fumes released during operation. Do not inhale any dust, mist or vapors from these chemicals. Do not allow these products to contact the skin or eyes. In case of contact, flush immediately with large amounts of fresh water and seek immediate medical attention. Wear protective clothing such as aprons, gloves, face masks and respirators. Be sure that adequate eyewashes and emergency showers are available nearby before handling or using any of these chemicals. Designated work clothing should be worn while using these chemicals and the worker(s) should thoroughly shower and change into fresh-clean street clothing before going home. Decontaminate all work clothing before reuse. The user is responsible for providing adequate work clothing, personal protection, limiting personal exposure and providing any required clean-up, decontamination as well as any needed medical attention.