To evaluate the effectiveness of Lactic acid as a cleaner in conjunction with Caprylic acid sanitizer in cleaning and sanitizing stainless steel alloys 304 and 316.
Date Run:
08/10/2022
Experiment Procedure:
Six stainless steel coupons were used, three being the 304 alloy and three being the 316 alloy. The initial weights of each coupon were taken. The coupons were then soiled with Cedar's Chocolate Hommus by wiping a thin layer, but leaving some chunky spots, and the bottom half of the substrate. The dirty weights of each coupon were then taken. Coupons were immersed in the heated cleaner Lactic acid cleaner 0.15% (140 F) and put in the ultrasonics machine for 20 mins. Directly after removing the coupons from the cleaner, they were then immersed in the sanitizer Caprylic acid sanitizer 0.15% at room temperature (68 F) and put in the ultrasonics machine for five minutes. The cleaned coupons were left to air dry for 8 hours. ATP levels were measured using Hygenia ATP Swabs followed by clean weights being taken for each coupon.
Trial Results:
Cleaner
Substrate
Initial wt of cont.
Final wt of cont.
%Cont Removed
% AVG
% Overall
Lactic acid cleaner
Stainless steel 304
0.2290
0.0119
94.80
97.82
98.46
0.4918
0.0102
97.93
0.2747
-0.0020
100.73
Lactic acid cleaner
Stainless Steel 316
0.2209
0.0029
98.69
99.10
0.4539
0.0039
99.14
0.6083
0.0033
99.46
Visually, some chocolate hommus was left on coupons
ATP Results
Cleaner
Substrate
ATP Level
Avg
Overall
Caprylic Acid Sanitizer
Stainless Steel 304
14
10.33
10.33
15
2
Caprylic Acid Sanitizer
Stainless Steel 316
8
10.33
13
10
Success Rating:
Test showed little or no promise.
Conclusion:
Lactic acid is not an effective cleaner for stainless steal alloys 304 and 316. Caprylic acid is not an effective sanitizer for stainless steel alloys 304 and 316.
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