| | Some parts, because of the material from which they are made,(e.g., titanium) or because of their design (bearings), require special cleaning precautions. While some of the materials may be similar in many ways to those used for general cleaning, the precautions differ in important respects. In other cases, some cleaning materials cannot be used at all on specific parts without damaging them. For example, vapor degreasing cannot be used on titanium parts because the halogenated solvents generally used in the process will cause stress-corrosion cracking at elevated temperatures. It cannot be used on bearings because, although the grease would be dissolved, it would carry particles of dirt into the bearing where they would be trapped, and also allows flash corrosion. |
