To mimic what happens in reality, when rust flakes off the surface of iron or steel, do the following.
-
Set the IRON-BLOCK-GEOMETRY to 9x9 Middle Box
-
Press the SETUP button
-
Press the GO/STOP
Let the model run until most of the edges are covered in rust.
3. Press the USE MOUSE button (it will stay black when pressed once)
4. Set the MOUSE-INTERACTION chooser to [drag away rust]
5. Then, using your mouse, left click and hold the button down when you point at a rust molecule. With the button on the mouse pressed down, drag the rust molecule away from the iron block.
In reality, the rusting process does not occur very quickly. In the model, the current setting for ACTIVATION-ENERGY of 400 is too low. The low setting of this slider is to help show you how rust would react if it required a small amount of kinetic energy to occur.