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BONDERITEeTechnical Process Bulletin <br /> BONDERITE M-CR 1200S AERO <br /> CHROMATE COATING <br /> (KNOWN AS ALODINE 1200S) <br /> In certain instances,the pH of the bath will continue to decrease several hours after an addition of nitric acid (as the <br /> solution seeks equilibrium). Accordingly, small adjustments in pH should be made allowing 15 minutes to elapse before <br /> subsequent adjustment. <br /> If the amount of nitric acid specified is insufficient to maintain the bath pH,the pH will rise causing a reduction in color <br /> intensity of the coating. If this occurs, increase the amount of nitric acid per addition (in small increments to a maximum <br /> of 1.5 pints per 2 to 4 pounds of BONDERITE M-CR 1200S AERO (known as ALODINE 12005) until the color intensity of <br /> the coating is maintained. <br /> AFTER TREATMENT: <br /> Water Rinsing: <br /> After the conversion coating treatment,the work is thoroughly rinsed in cold water. The rinse should be continuously <br /> overflowed and the overflow should be regulated with the rate of production so that the main body of the rinse never <br /> becomes excessively contaminated. <br /> Drying: <br /> The treated articles should be dried immediately after the post treatment. Enough heat usually remains from a hot post <br /> treatment to cause heavy gauge articles to dry satisfactorily. If the post treatment is not heated or the articles do not <br /> dry satisfactorily, an indirect fired drying unit or any other means which will not contaminate the treated surface with <br /> fumes, oil, or partially burned gases may be used. If an oven or other heat source is used,the temperature of the metal <br /> surface should not be permitted to exceed 150° Fahrenheit to maintain optimum corrosion resistance. <br /> Products with cavities or pockets which trap moisture should be blown dry with clean, compressed air. Moisture <br /> spatters should be dried with clean cloths. <br /> Dried, unfinished parts should not be handled. If handling if necessary, plastic or clean (often changed) cotton gloves <br /> should be used. <br /> STORAGE REQUIREMENTS: <br /> BONDERITE M-CR 12005 AERO (known as ALODINE 1200S) is a powdered product and is unaffected by freezing. <br /> DISPOSAL INFORMATION: <br /> Applicable regulations covering disposal and discharge of chemicals should be consulted and followed. <br /> The processing bath is acidic and contains chromium and ferricyanide. Waste treatment and neutralization will be <br /> required prior to discharge to the sewer. (Refer to Waste Treatment Information Bulletin WT1004, available on request.) <br /> 0 Henkel <br /> 6of8 <br />