Look on the hoses and gaskets to find from where the fluid could be leaking. Add power steering stop leak additive to your power steering fluid. Lucas Power Steering Stop Additive is 100 percent guaranteed to stop seal leaks. In older cars, the seals shrink, causing leaks.
Diffusion is the net movement of molecules or atoms from a region of high concentration with high chemical potential to a region of low concentration with low chemical potential.
A membrane can allow molecules to be passively transported through it in three ways: diffusion, osmosis, and filtration. 1  Diffusion: Sometimes organisms need to move molecules from an area where they are highly concentrated to an area where the molecules are less concentrated.