To evaluate supplied products for grease removal from various surface found on a boat.
Date Run:
09/24/2014
Experiment Procedure:
The two cleaning products were used at the requested dilutions at room temperature for all boat cleaning. Preweighed stainless steel coupons were coated with lithium grease using a handheld swab and allowed to dry for 2 hours at room temperature. The contaminated coupons were weighed again to determine the amount of soil added.
Three coupons were placed into a Gardner Straight Line Washability unit. A Kimberly-Clark Wypal reinforced paper towel was attached to the cleaning sled and soaked with 1-2 sprays of cleaning solutions. Each coupon was sprayed 1-2 times with the same cleaning solution. The cleaning unit was run for 30 cycles (~45 seconds). At the end of the cleaning, coupons were wiped once with a dry paper towel. Final weights were recorded, efficiencies were calculated and recorded. Additional rounds of cleaning were conducted until the stainless-steel coupons were completely free of lithium grease.
Chemistries Evaluated: Wechem Boat Soap (3.125%); West Marine Heavy Duty Boat Soap 3.125%
Trial Results:
After the initial 45 seconds of cleaning, all products had limited success in removing the soiled coupons. An additional 45 seconds of cleaning using a new wipe improved removal. The table lists the amount of soil added and the calculated efficiency for each coupon cleaned. The second table summarizes the removal for each product after each 30 cycles.
Cleaner
% Removed for after each run
WeChem
Soil added
45 sec
90 sec
135 sec
180 sec
225 sec
0.5055
48.98
82.65
96.93
98.93
99.09
0.5035
29.51
76.01
96.68
99.09
99.15
0.5685
44.93
82.71
97.84
98.91
98.28
West Marine Heavy Duty Boat Soap 3.125% - Stainless Steel
0.5232
37.88
68.75
89.53
98.18
99.31
0.5025
8.20
63.88
86.37
98.47
99.30
0.5368
27.29
70.94
89.47
98.92
99.70
Table of Average removal after each 30 cycles
Round 1 Cleaning
% Removed
WeChem 3.125% - Stainless Steel
41.14
West Marine 3.125% - Stainless Steel
24.46
Round 2 Cleaning
WeChem 3.125% - Stainless Steel
80.46
West Marine 3.125% - Stainless Steel
67.86
Round 3 Cleaning
WeChem 3.125% - Stainless Steel
97.15
West Marine 3.125% - Stainless Steel
88.46
Round 4 Cleaning
WeChem 3.125% - Stainless Steel
98.98
West Marine 3.125% - Stainless Steel
98.52
Round 5 Cleaning
WeChem 3.125% - Stainless Steel
98.84
West Marine 3.125% - Stainless Steel
99.44
Success Rating:
A cleanliness study, addressing only various analytical techniques.
Conclusion:
The WeChem product required fewer cycles to completely remove the lithium grease from the surface as compared with the West Marine product.
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