Mid 19th century; earliest use found in The Penny Cyclopaedia. From electro- + deposit.
electrodeposit2
/ɪˌlɛktrəʊdɪˈpɒzɪt/
Manufacturing Technology
verb
[with object]To cause (a metal) to be deposited from solution by electrolytic action; to apply (a coating of a metal) in this way, by making the article to be coated act as the cathode in an electrolytic cell where the metal forms the anode.
Origin
Mid 19th century. From electro- + deposit. Compare earlier electrodeposit and electrodeposition.