Dispersants cut the oil as washing-up liquid cuts the grease on dishes, allowing oil on the surface to spread down into the water.
分散剂清除浮油的原理就如同洗涤液除去器皿上的油腻物一般，使海面的浮油沉入水中。
2
The presence of exogenous surface contamination, including dirt, grease, free iron from contact with steel tooling, and so forth, may interfere with the formation of the passive film.
外生的表面污染，包括：尘土、油脂、来自钢铁加工的游离铁等等，可以影响到钝化膜的生成。
3
Always recommended that you rinse surface area off with plenty of water to loosen dirt and grease.