Phase Transformations in the Metallic Materials Being Electrodeposited and their Application for the Development of Advanced Technologies for Anticorrosive Protection of Canned-Food Steel Sheet

Abstract

It has been found that during the electrodeposition of metallic material a supercooled metallic liquid is being formed that is solidified at the deposition temperature in the form of a crystalline or amorphous phase. These phase transformations are proved by the existence in the electrodeposited metals of metastable structures that correspond to: the amorphous structure of the solidified metallic liquid, the highly defective crystalline structure of the metal quenched from the liquid state, and the intermediate modifications that had appeared during the fast crystallization of the liquid phase of the polymorphous metal. On the basis of this phenomenon there have been developed the technologies for producing of protective texturally-composite tin electrocoat, nanostructurally-texturally-composite chromium electrocoat, and amorphous composite chromium electrocoat on canned-food steel sheet.