The fuel tank was cleaned in a 15-gallon electrolysis tank. It was not quite deep enough for complete coverage but helps to demonstrate the process. By attaching the negative lead directly to the cast iron part, a better connection was made and the bubbling action was vigorous. The sacrificial metal was two inch wide flat metal plate about 1/16" thick. The vertical members extending into the solution are bolted to another metal strip that is bent into a box shape that surrounds the part to be cleaned.

The fuel tank was cleaned in the electrolysis bath for 24 hours. The image on the left clearly shows the process worked well to remove the rust. The extreme edge of the leg that is not clean is the section that extended above the water level. The inside of the fuel tank is a testimony to the cleaning capacity of this method. This part was removed from the solution and scraped with a putty knife and wire brushed a couple of times during the 24 hour period. Electrolysis is an excellent method to remove rust and certainly is not as abrasive as sand blasting or muriatic acid.