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SME EM920141
- Effective Minimization Of Phosphates For Plastics Pretreatment
- standard by Society of Manufacturing Engineers, 06/01/1992
- Publisher: SME
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WITH THE INCREASE IN ENVIRONMENTAL AWARENESS AND REGULATIONS, THE USE OF PRODUCTS CONTAINING PHOSPHATES HAS COME UNDER RESTRICTION IN MANY PARTS OF THE UNITED STATES. THERE ARE SEVERAL OPTIONS THAT CAN BE USED TO REDUCE PHOSPHATE DISCHARGES. MANY LARGER SYSTEMS HAVE WASTE TREATMENT FACILITIES THAT CAN PROCESS THE DISCHARGED WATER. IT IS OFTEN NECESSARY TO CHANGE OPERATING PARAMETERS WHEN SWITCHING TO A LOW OR NON-PHOSPHATE PRETREATMENT SYSTEM TO MAINTAIN OPTIMUM RESULTS. THE PROPER PRE-TESTING MUST BE PERFORMED TO INSURE THAT THE QUALITY OF THE PAINTED PART DOES NOT SUFFER AS A RESULT OF ANY PROCESS CHANGES.