Interface characteristics and corrosion behaviour of oriented bulk Fe₂B alloy in liquid zinc

The interface characteristics and corrosion behaviour of oriented Fe₂B in liquid zinc have been investigated. The results indicate that Fe₂B with preferential growth direction parallel to corrosion interface displays better corrosion resistance to liquid zinc. The Fe₂B/FeB phase transition occurs due to gradient of chemical potential in solid Fe₂B-liuqid zinc system. The liquid zinc corrosion is competition process of dissolution, Fe₂B/FeB transition and fracture-spalling. The fracture-spalling dominates corrosion process when preferred direction of Fe₂B is perpendicular to corrosion interface while Fe₂B/FeB transition plays a role in liquid zinc corrosion as preferred direction of Fe₂B is parallel to corrosion interface.