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Cardite #1211 increases the effectiveness and efficiency of any alkaline solution used for etching aluminum and its common commercial alloys; it is especially recommended for solutions of caustic soda. A unique blend of anionic/non-ionic surfactants and sequestrants:
Operating benefits are:More Uniform Results
Because solution performance is the same over a wider range of caustic concentrations and operating temperatures.
Less Equipment Maintenance
Eliminates scraping or wire brushing to clean tank. Cardite #1211 prevents scale formation; when tank is drained for re-charging, it can be cleaned with a water rinse.
Easy To Measure & Mix
Liquid form permits simple, accurate measurement by volume. If used with liquid caustic, both chemicals can be measured accurately by volume. Low viscosity assures quick dispersion in water and homogenous solutions.
Solution life is prolonged – usually about 30% more pieces can be run before the solution is exhausted. Drag-out losses are reduced since equivalent results can be secured at lower concentrations of caustic soda.
Cardite #1211 is used in proportion to the quantity of caustic soda in solution:
Following are several common solutions of caustic soda and the quantity of Cardite #1211 required PER 100 GALLONS of solution:
Use tanks, hooks, chains, and racks which are not affected by caustic soda. Satisfactory materials are stainless steel, fiberglass and polyethylene. Tanks should have some device to provide agitation; compressed air injected at bottom is commonly used. Rinse tank should have continuous inflow and outflow of about one gallon per minute.
50% liquid caustic is recommended; it can be easily measured by volume, it dissolves instantly. Dry caustic will produce the same result but is harder to handle; see the follow table for equivalent solutions.
Recommendations based on using tanks with an operating capacity of 100 gallons:
Additions To Chemical Tank & Variations
Note concentration range at which consistently good results are secured. As Cardite #1211 and caustic are depleted by use, add enough to restore to original concentration.
Find quantity of caustic needed by titration with phenolphthalein & hydrochloric acid. Add Cardite #1211 and 50% liquid caustic in ratio of 1:11 by volume. Normally, 10 to 20 additions can be made before sludge accumulation makes additions uneconomical. When additions fails to produce normal quality, discard the solution, rinse tank, and re-charge with a fresh solution.
Considerable variations can be made in caustic concentration, temperature, and immersion time. Cardite #1211 should always be used at fixed ratio of 1 gal Cardite #1211 per 11 gal 50% liquid caustic. Trial will indicate the most efficient usage levels & operating conditions for a specific alloy. Permissible variations are:
Properties & Use Precautions
Cardite #1211 is a clear, amber liquid. Non-Flammable. Biodegradable. Odorless. Low viscosity; easy to pump or feed through metering devices. Neutral. Non-Hazardous. But: caustic soda is extremely hazardous; use appropriate safety measures.