Eight cleaners were selected based on the lab’s database of effective cleaning trials and vendor supplied information. Two additional cleaners were used based on client’s current cleaning practices. Each product was diluted to 5% with DI water in a 100 ml beaker. A small piece of each type of steel was immersed into each solution and allowed to soak for 5 minutes at room temperature. At the end of the 5 minutes, each piece of metal was rinsed in DI water and dried with a heat gun for 1 minute. Observations were made and each piece was wiped with a white tissue to determine the extent of cleaning. The 8 laboratory selected cleaners were compared to the 2 client supplied cleaners.
Substrates: Steel (Theis and Hitachi)
Contaminants: Rust Preventatives: Castrol Industrial, Inc Rustilo DW 924 HF (64742-53-6, 61790-48-5, 64742-47-8); Theis metal Esso Sekiyo K.K. Anti Rust ND 33 (64742-48-8, 64742-01-4); Hitachi metal
Each of the cleaners selected were as effective or better than the current cleaners for removing the Rustilo DW 924 HF rust preventative from the Theis metal. Inproclean 3800 and SC Aircraft & Metal Cleaner appeared to be the more effective cleaning solutions in the removal of the Anti Rust ND 33 from the Hitachi metal.