the invention refers to the electrolytic deposit of a tin - and ruthenium - based alloy having good features of corrosion resistance . in particular , the invention refers to an ecologically compatible process to achieve the electrolytic deposit of the alloy and to the operative conditions to make the deposit . moreover , the invention refers to the electrolytic bath from which the alloy is caused to electro - deposit . in particular , the electrolytic bath is advantageously distinguished by the total absence of toxic metals and cyanides . the invention refers also to the alloy obtained through that process , as well as to the object / manufactured article covered with the alloy obtained through that process .