Which substance is often used as a cleaning agent on tankers?

Using solvents as cleaning agents on tankers is common due to their effectiveness in removing a range of contaminants, including oily residues and other stubborn stains. Solvents can dissolve various types of organic materials, making them particularly useful in the oil and chemical industries. They are often employed to prepare tank surfaces for inspection or when switching between different cargoes to avoid contamination.

Water, while often used for rinsing and preliminary cleaning, is not as effective on its own for heavy-duty cleaning tasks or in removing oily substances. Acids are sometimes utilized in specific circumstances, but they require careful handling due to their corrosive nature and potential to damage metal surfaces. Surfactants are used in cleaning products to help emulsify oils and allow easier removal, but they typically work in conjunction with solvents or water rather than being primary cleaning agents on their own. Therefore, solvents stand out as the most versatile and efficient choice for cleaning on tankers.