A bolt from a river boat that sank in the Missouri River in 1820, cleaned of rust by electrolysis.	The gentle cleaning of rust from a  flat washer by the electroysis method has revealed file marks where the flat washer hole was enlarged. This washer was from an iron mine hoist site on Ruffner  Mountain, Birmingham, AL.
Mining tram car bumper piece cleaned by electroylsis.	Carbide insert rock drill bit, notice the brass shim surrounding the carbide insert, that has not been damaged by cleaning.
Railroad track component from the Dago Iron Mine site, Birmingham, AL Historic Machinery Services rust removal by electrolysis uses low current densities that retain fine detail that would otherwise be obilterated by more aggressive cleaning methods.