The utility model discloses a corrosion resistant closed ware that melts absolutely, including porcelain base, the terminal, the pipe cap, a spring, the shrinkage insulating tube, the downlead, the fuse egress line, the insulator, a sealing cover, anticorrosive adventitia, copper sheet and fusion tube, one side of porcelain base is provided with the terminal, the terminal is connected with the pipe cap, pipe cap and spring coupling, porcelain base's top is provided with the insulator, the insulator is connected with the shrinkage insulating tube, the inside of shrinkage insulating tube is provided with the downlead, downlead and fuse tube connected, the fusion tube is connected with the fuse egress line, the surface of fusion tube is provided with the copper sheet, the surface of copper sheet is provided with anticorrosive adventitia, the copper sheet is connected with sealed lid, the copper skin external side on fusion tube surface is provided with the anticorrosive adventitia that the one deck is fine and closely woven, this anticorrosive adventitia comprises inorganic coating, the long -term closed fuse's who uses under humidity or low temperature environment part can prevent effectively owing to receiving the corruption, and prolonging the service lifetime of the device, and minimizes safety hidden troubles.