Trial Number 1

A set of six stainless steel coupons were weighed on an analytical balance to determine their initial mass. Once this was completed the coupons were evenly soiled with half a gram of motor oil with a handheld swab. The coupons were reweighed to determine the mass of the coupons with the contaminant applied.

Cleaning process:
Dilutions were prepared for the two cleaners, SWR One and Suma Break-Up HD Degreaser as recommended by the vendor. Two 500 mL beaker solutions were made with 10% dilution of SWR One cleaner, and the other with 5% dilution of Suma Break-Up HD Degreaser. Three soiled coupons were placed into the SWR One cleaning solution and the remaining three soiled coupons were placed into the Suma Break-Up HD Degreaser. The coupons were immersed for a total of 30 minutes. After this was completed the coupons were placed into beakers at room temperature with tap water in the beaker, and allowed to sit for a minute in the bath before being removed. Thereafter, the coupons were blow dried at low pressure for 5 minutes and left to air dry for 2 hours. Following the air dry period, the coupons were weighed on the analytical balance to obtain the amount of contaminant removed.

In terms of overall effectiveness both cleaners are ineffective at removing motor oil from the stainless steel coupons. However, the comparative cleaner: Suma Break-Up HD Degreaser was observed to be about as effective as the sampled cleaner.

SWR One cleaner, with a difference of the two average overall removal percentages being less than 5%.