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coral <br /> i=iter rnat ionalinc <br /> Creative excellence for you! <br /> OPERATING BULLETIN <br /> SOLUTION CONTROL <br /> Concentration: There is no direct titration method <br /> to determine the concentration of <br /> CORAK in the bath. Your Coral <br /> Consultant can recommend a daily <br /> addition rate to maintain a proper <br /> concentration. <br /> pH Control : <br /> Materials required: Glass-electrode pH Meter <br /> (recommended) <br /> Taylor pH Slide Comparator <br /> Note: pH paper has not been found <br /> satisfactory. <br /> Iron phosphate: <br /> A CORAK bath for use with iron phosphate coatings should be <br /> used at a pH of 5 .0 , with an operating <br /> range of 4 . 7 to 5. 3 . Should the pH rise above <br /> 5.3 , additions of CORAK 712 are needed. The addition of 70 ml . <br /> of CORAK 712 per 1000 gallons <br /> for each 0 . 1 unit of desired reduction. <br /> STORAGE <br /> To meet pollution control regulations now being enforced by several <br /> states, we recommend that all chemical products be stored and used <br /> in locations which will not permit direct access to sanitary or <br /> surface drains. These areas should be constructed in such a manner <br /> that any chemicals lost can be either salvaged <br /> or suitably treated to prevent pollution of natural waters. <br /> 3 <br />