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.
the mutual penetration of adjoining substances because of the thermal motion of their particles. Diffusion occurs in the direction of decreasing concentration of a substance and leads to a uniform distribution of matter over the entire volume it occupies (to the equalization of the chemical potential of matter).