# What will happen to the energy of spring in the case if we kept it compressed forever and release after infinite time? [duplicate]

Just assume a case in which we have a spring with the spring constant '$$K$$' and made up of iron or steel and if we compress it with some distance '$$x$$' Then the potential energy stored in it will be like:-

$$U = \frac{1}{2} Kx^2$$

And kept just like that for an infinite amount time and with time this spring is going to be rusted and then after that when we will release this spring then it's not going to come back to its original mean position so my question is where did the potential energy stored in it go? According to the energy conservation there might be something which is taking that energy up or getting converted into some other kind of energy. if not, then the potential energy of the spring should be stored in it forever but this doesn't happens.

Edit:- this is not equal to the case when the compressed spring is immersed in some acid because the spring will get immediately dissolved in the acid and that energy might get converted into some other form and in this case the spring is still there and my question is regarding this