Spray analysis test mist reduction

Development of a Spray Analysis Test for Measuring Mist Reduction... 

The amount of aerosol mist was established for the baseline semisynthetic emulsion and was assigned the value of 0% mist reduction. Additizing this fluid with 1000 ppm of the 1 million MW PEO resulted initially in a 70% reduction in mist (Figure 4) however, after 0.5 hr of machining the mist level increased by 10% over the baseline fluid. Additional machining for 1.0 hr resulted in further degradation of the polymer and an increase in mist of 20% over the baseline. The spray analysis test predicted <6% mist reduction. 

The semisynthetic metalworidng fluid was additized with 1000 ppm of Polymer B. The additized solution provided 45% mist reduction upon the initial addition of the polymer (Figure 4) and after 1.5 hr of machining there was >35% mist reduction. This result correlates with the spray analysis test which predicted 22% mist reduction... 

Using the spray pattern analysis test, the amount of aerosol mist reduction, ADGeducUon) Obtained for an aqueous solution containing 5000 ppm of a 1 million MW PEO polymer was calculated to be 20%, Figure 2. Similarly, the amount of aerosol mist reduction, AD(reduction) obtained for an aqueous solution containing 5000 ppm of a 2 million MW PEO polymer was calculated to be 40%. 

A grinder test was developed to correlate the mist reduction observed in the spray pattern analysis test with an actual metalworking operation. Both a semisynthetic which contains 10% emulsified oil and a synthetic metalworking fluid which contains no mineral oil, were used during the machining of steel bar stocks. 

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