For a time there were people who manufactured a device that they claimed would prevent the build up of scale on piping and components in water systems and would also work to remove or "descale" and accumulation prior to the installation of their device. Some electric power was provided. I wasn't convinced they did anything and others who bought the things eventually regretted making the purchase.
At a basic level it seems reasonable that an electric current could impact the formation of scale but there is so much variability in a normal water system that it might help to remove scale in one place and deposit twice as much in another.
As I understand it, this is quite different that systems that use electric current to slow or stop corrosion.