Getting rid of humidity inside walls with electricity?
Apart from cutting the wall at the base and putting an insulating layer or making holes and pouring synthetic resins to isolate the section, all complicated and expensive procedures, he found an interesting system (called kalibradry, with some copycats around) that fights the capillary action of water by breaking up water dipoles through a magnetic field.
Here is a link to the company's explanations on how the thing works : http://http://www.skm-italia.eu/skm/DocumentiProfessionisti/14_ITA.pdf (it is in Italian, but it has lots of pictures plus a simple google translate should do most of the job)
and here is the link to the company website: http://translate.google.com/translate?client=tmpg&hl=en&u=http%3A%2F%2Fwww.skm-italia.eu%2Fskm%2Fit%2Fdefault.aspx&langpair=it|en
The system, to my surprise, seems to be quite effective, so much that it is being used all over Europe (mainly Germany, Austria, Italy), even in valuable historical buildings, such as the Unesco recognised Palazzo del Te in Mantua with frescoes of the Renaissance master Mantegna. I doubt they would allow anything dodgy or dangerous plus I called directly and the museum confirmed they are using the system succesfully and plan on expanding experimantation.
I was wondering if anyone could think of a DIY version of the system, since the price for one is around 5000 USD, way above my friend's budget.
As a secondary note, there is an even more astonishing system, although much more dodgy, called aquapol that seems to be using electrostatic electricity to deflect water, making it more difficult for water to "climb up" walls
this also seems quite effective and is being used in historical buildings as well, but I wonder how it could ever work without an energy source.