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Trial Number 6

Trial Purpose:

To compare three cleaners effectiveness in cleaning samples using various cleaning times.

Date Run:

05/11/1999

Experiment Procedure:

The Alumina and Macor supplied parts were broken down into similar sized and shaped pieces to be used for the evaluation. This was performed according to proposed testing method for gravimetric analysis which states:
Gravimetric Analysis: Employed properly, gravimetric analysis can be the most inexpensive and revealing of all surface measurement techniques. Ideally, the part or test coupon is weighed a total of three times with the same analytical balance and under the same atmospheric conditions. Weights are taken (1) before artificial contamination, (2) after artificial contamination and (3) after cleaning. These tests should be duplicated a number oftimes to ensure reproducibility of results. Percent soil removal and standard deviations can then be calculated. Some difficulty may arise in arriving at a pre-contamination weight under actual plant/production settings, though estimates may be possible. Care must be taken in selecting near-identical substrate pieces and applying the contaminant in a consistent manner.

All parts and pieces were subjected to a pre-cleaning protocol. The current client cleaning practice was used as this pre-cleaning method. After parts were initially weighed, they were cleaned in a 9% Branson GP solution for 30 minutes in a 40 kHz ultrasonic tank heated to 140 F. After rinsing in tap a tap water spray for two minutes at 120 F and dried using a Master Appliance Corp, Hot-air gun model HG-301A at 500 F for five minutes, the parts were weighed. If the cleaned weights were within 0.0009 g of the original weights, the parts were accepted as being cleaned. For the parts that did not fall within this range, additional pre-cleaning cycles were completed until the final weights were in the desired range.
Once the pre-cleaning was completed, the parts were submerged into the metal working fluid for 10 seconds and then were weighed again to determine the amount of contaminant added. Next the parts were cleaned in the specified cleaning solutions and cleaned for 10 and five minute periods. Rinsing and drying were performed as they were in the pre-cleaning phase. Once the parts returned to room temperature, final weights were recorded and cleaning efficiencies were calculated.
SUBSTRATE MATERIAL: Molybdenum parts, Alumina pieces, Titanium parts and Macor pieces
CONTAMINANTS: Metal working fluid (Hangsterfer’s S-500CF_US)
CONTAMINATING PROCESS USED: Parts were immersed into contaminant for 10 seconds at room temperature.

Trial Results:

All three products removed all of the contaminant when the 10 minute cleaning cycle was used for both concentrations evaluated. Branson was effective at both dilutions and cleaning times. Brulin was effective at the lower cleaning time for the 9% solution only. Valtech was the least effective when cleaning for five minutes. Table 2 lists the cleaning efficiencies for all concentrations and times.

Table 2. Cleaning Efficiencies at 10 and 5 Minutes

Product Branson 9 Brulin 9 Valtech Branson 5 Brulin 5
Time 10 10 10 10 10
Molybdenum 100.04 100.16 98.57 100.07 100.29
Alumina 100.67 100.32 103.09 101.34 101.73
Titanium 100.03 100.47 102.30 100.24 100.58
Macor 101.05 101.31 96.32 102.55 101.22
           
AVERAGE 100.45 100.57 100.07 101.05 100.96
           
Product Branson 9 Brulin 9 Valtech Branson 5 Brulin 5
Time 5 5 5 5 5
Molybdenum 100.70 99.76 100.93 100.59 99.73
Alumina 103.58 100.63 98.56 102.62 100.54
Titanium 100.28 101.31 86.68 100.53 99.91
Macor 109.36 100.53 98.97 101.12 99.67
           
AVERAGE 103.48 100.56 96.28 101.22 99.96

Data used for calculations are included in the following Appendix.

Appendix A.  Efficiency Calculations

  initial wt dirty wt clean wt wt of cont     final wt          %removal Average %
Branson 9% 10 min                     
Molybdenum      24.5017 24.5602 24.5017 0.0585 0 100.00  
  24.6155 24.7045 24.6154 0.089 -1.00E-04 100.11  
  24.6368 24.7413 24.6368 0.1045 0 100.00 100.04
Alumina 8.6746 8.7858 8.674 0.1112 -0.0006 100.54  
  8.6925 8.7235 8.6922 0.031 -0.0003 100.97  
  8.5235 8.5819 8.5232 0.0584 -0.0003         100.51 100.67  
Titanium 34.6483 34.8132 34.6483 0.1649 0 100.00  
  34.6333 34.7799 34.6332 0.1466 -1.00E-04 100.07 100.03
Macor 7.5029 7.5314 7.5023 0.0285 -0.0006 102.11  
  7.5888 7.6183 7.5888 0.0295 0 100.00 101.05
               
  initial wt dirty wt clean wt wt of cont     final wt          %removal Average %
Branson 5% 10 min                     
Molybdenum      24.5564 24.6097 24.5564 0.0533 0 100    
  24.6422 24.7503 24.6418 0.1081 -0.0004 100.37  
  24.5574 24.6183 24.5575 0.0609 1.00E-04 99.84 100.07
Alumina 8.8247 8.8396 8.8243 0.0149 -0.0004 102.68  
  8.7727 8.7758 8.7727 0.0031 0.0000 100.00 101.34
Titanium 33.697 33.8793 33.696 0.1823 -0.001 100.55  
  34.5626 34.6956 34.5627 0.133 1.00E-04 99.92 100.24
Macor 10.7857 10.8929 10.7811 0.1072 -0.0046 104.29  
  10.9617 10.9865 10.9615 0.0248 -0.0002 100.81 102.55
               
  initial wt dirty wt clean wt wt of cont     final wt          %removal Average %
Valtron 2% 10 min                     
Molybdenum       24.5713 24.5932 24.5719 0.0219 0.0006 97.26  
  24.6167 24.6772 24.6173 0.0605 0.0006 99.01  
  24.4817 24.5167 24.4819 0.035 0.0002 99.43 98.57
Alumina 11.5616 11.5783 11.5613 0.0167 -0.0003 101.80  
  11.6885 11.6976 11.6884 0.0091 -1.00E-04 101.10  
  11.575 11.5907 11.574 0.0157 -0.001 106.37 103.09
Titanium 18.1886 18.2308 18.1881 0.0422 -0.0005 101.18  
  18.163 18.1835 18.1623 0.0205 -0.0007 103.41 102.30
Macor 5.8024 5.8053 5.8026 0.0029 0.0002 93.10  
  5.943 5.9853 5.9432 0.0423 0.0002 99.53 96.32
               
  initial wt dirty wt clean wt wt of cont     final wt          %removal Average %
Branson 9% 5 min                     
Molybdenum         24.5017 24.5584 24.5007 0.0567 -0.001 101.76  
  24.6154 24.6881 24.6153 0.0727 -1.00E-04 100.14  
  24.6368 24.6843 24.6367 0.0475 -1.00E-04 100.21 100.70
Alumina 8.672 8.6834 8.6715 0.0114 -0.0005 104.39  
  8.691 8.7197 8.6909 0.0287 -0.0001 100.35  
  8.521 8.526 8.5207 0.005 -0.0003 106.00 103.58
Titanium 34.6484 34.7211 34.648 0.0727 -0.0004 100.55  
  34.6327 24.7524 34.6338 -9.8803 0.0011 100.01 100.28
Macor 7.4998 7.5462 7.4993 0.0464 -0.0005 101.08  
  7.5868 7.5902 7.5862 0.0034 -0.0006 117.65 109.36
               
  initial wt dirty wt clean wt wt of cont     final wt          %removal Average %
Branson 5% 5 min                     
Molybdenum 24.5564 24.6297 24.5562 0.0733 -0.0002 100.27  
  24.6418 24.7079 24.6413 0.0661 -0.0005 100.76  
  24.5575 24.6239 24.557 0.0664 -0.0005 100.75 100.59
Alumina 8.8195 8.8268 8.8193 0.0073 -0.0002 102.74  
  8.7717 8.7996 8.771 0.0279 -0.0007 102.51 102.62
Titanium 33.6999 33.8073 33.6989 0.1074 -0.001 100.93  
  34.5649 34.6443 34.5648 0.0794 -0.0001 100.13 100.53
Macor 10.7798 10.8231 10.7785 0.0433 -0.0013 103.00  
  10.9577 10.9973 10.958 0.0396 0.0003 99.24 101.12
                      
  initial wt dirty wt clean wt wt of cont     final wt          %removal Average %
Valtech 2% 5 minutes                     
Molybdenum       24.5719 24.63 24.5713 0.0581 -0.0006 101.03    
  24.6173 24.6462 24.6171 0.0289 -0.0002 100.69  
  24.4819 24.5198 24.4815 0.0379 -0.0004 101.06 100.93
Alumina 11.5523 11.6939 11.5528 0.1416 0.0005 99.65  
  11.686 11.6999 11.6865 0.0139 0.0005 96.40  
  11.1509 11.203 11.1511 0.0521 0.0002 99.62 98.56
Titanium 18.1881 18.2566 18.2011 0.0685 0.013 81.02  
  18.1623 18.2015 18.1653 0.0392 0.003 92.35 86.68
Macor 5.7985 5.837 5.7989 0.0385 0.0004 98.96  
  5.9409 5.9604 5.9411 0.0195 0.0002 98.97 98.97
               
  initial wt dirty wt clean wt wt of cont     final wt          %removal Average %
Brulin 9% 10 min                     
Molybdenum       24.5 24.567 24.5 0.067 0 100    
  24.6143 24.7146 24.6143 0.1003 0 100.00  
  24.6363 24.6789 24.6361 0.0426 -0.0002 100.47 100.16
Alumina 8.6681 8.6944 8.6679 0.0263 -0.0002 100.76  
  8.6887 8.7362 8.6886 0.0475 -0.0001 100.21  
  8.5177 8.586 8.5177 0.0683 0.0000 100.00 100.32
Titanium 34.6464 34.7524 34.6456 0.106 -0.0008 100.75  
  34.6338 34.7876 34.6335 0.1538 -0.0003 100.20 100.47
Macor 7.4947 7.5615 7.4943 0.0668 -0.0004 100.60  
  7.5826 7.6024 7.5822 0.0198 -0.0004 102.02 101.31
               
  initial wt dirty wt clean wt wt of cont     final wt          %removal Average %
Brulin 9% 5 min                     
Molybdenum      24.5554 24.6485 24.5556         0.0931 0.0002 99.79      
  24.6406 24.7349 24.6408 0.0943 0.0002 99.79  
  24.5562 24.622 24.5564 0.0658 0.0002 99.70 99.76
Alumina 8.8183 8.851 8.8185 0.0327 0.0002 99.39  
  8.7696 8.7803 8.7694 0.0107 -0.0002 101.87 100.63
Titanium 33.6959 33.8987 33.6942 0.2028 -0.0017 100.84  
  34.5648 34.7558 34.5614 0.191 -0.0034 101.78 101.31
Macor 10.7778 10.8617 10.7774 0.0839 -0.0004 100.48  
  10.9548 10.9896 10.9546 0.0348 -0.0002 100.57 100.53
               
  initial wt dirty wt clean wt wt of cont     final wt          %removal Average %
Brulin 5% 10 min                     
Molybdenum      24.5703 24.6078 24.5702 0.0375 -1.00E-04 100.27    
  24.6163 24.7178 24.6159 0.1015 -0.0004 100.39  
  24.4805 24.5769 24.4803 0.0964 -0.0002 100.21 100.29
Alumina 11.5513 11.5744 11.5508 0.0231 -0.0005 102.16  
  11.684 11.753 11.6831 0.069 -0.0009 101.30 101.73
Titanium 18.1886 18.2436 18.1879 0.055 -0.0007 101.27  
  18.1616 18.2444 18.1617 0.0828 1.00E-04 99.88 100.58
Macor 5.7983 5.8219 5.798 0.0236 -0.0003 101.27  
  5.9403 5.9743 5.9399 0.034 -0.0004 101.18 101.22
               
  initial wt dirty wt clean wt wt of cont     final wt          %removal Average %
Brulin 5% 5 min                     
Molybdenum     24.5703 24.6514 24.5704 0.0811 1.00E-04 99.88    
  24.6164 24.6577 24.6165 0.0413 1.00E-04 99.76  
  24.4811 24.5941 24.4816 0.113 0.0005 99.56 99.73
Alumina 11.5487 11.6339 11.5482 0.0852 -0.0005 100.59  
  11.6814 11.7119 11.6813 0.0305 1.00E-04 100.33  
  11.5538 11.6391 11.5532 0.0853 -0.0006        100.70 100.54  
Titanium 18.188 18.2862 18.188 0.0982 0 100  
  18.1622 18.2688 18.1624 0.1066 0.0002 99.81 99.91
Macor 5.7962 5.8408 5.7963 0.0446 1.00E-04 99.78  
  5.937 5.9837 5.9372 0.0467   0.0002         99.57 99.67  

Success Rating:

A follow up test, usually based on company input.

Conclusion:

The Branson and Brulin products were nearly identical in the cleaning trials performed.  The Branson product was slightly more effective at the lower concentration (5%) and time (5 min).  All three products were effective in removing at least 96% of the contaminant from the parts.