Final answer:
Rime icing is the frosty, rough ice that forms when supercooled water droplets freeze upon contacting a surface. It often occurs in cold environments and can be a hazard to aircraft and structures. To combat it, one uses de-icing systems or manual removal methods.
Step-by-step explanation:
What is Rime Icing?
Rime icing is a type of icing that occurs when supercooled water droplets in the atmosphere freeze upon contact with an object. It usually happens in environments where the temperature is just below freezing (0°C or 32°F) and in the presence of fog or clouds consisting of supercooled water droplets. Rime is characterized by its rough, milky white appearance and can form on the leading edges of aircraft wings, wind turbine blades, or any exposed surface at high altitudes or latitudes.
When Does It Happen and What Do You Do?
Rime icing typically happens in the winter or in cold climate zones when an aircraft or other structure is flying or situated in an area with a high concentration of supercooled droplets. When encountering rime icing on an aircraft, it is critical to use de-icing equipment, if available, to remove the ice. This can include systems that heat the wings or propel de-icing fluids to prevent ice buildup. If you are on the ground and face rime icing on structures or vehicles, you must manually remove the ice or apply chemicals that lower the freezing point of water to prevent accumulation.