Method for galvanizing

Abstract

Abstract A METHOD AND APPARATUS FOR GALVANIZING WIRE, IN WHICH THE WIRE RECEIVED DIRECTLY FROM THE DRAWING OPERATION AND WITHOUT ANY ANNEALING OR ACID CLEANING IS PLACED IN CONTACT WITH AN ELECTRIC CHARGE BAR OR IS OTHERWISE HEATED TO A RELATIVELY HIGH TEMPERATURE SUCH AS OF THE ORDER OF 1500 DEGREES F. THE HEATED WIRE IS THEN PASSED THROUGH A MOLTEN ZINC BATH, THE TEMPERATURE OF WHICH MAY BE ABOUT ONE-HALF OF THAT OF THE WIRE OR OF THE ORDER OF 850-900 DEGREES F. THE TEMPERATURE OF THE MOLTEN ZINC BATH IS MAINTAINED AS LOW AS POSSIBLE SO AS TO OBTAIN THE GREATEST TEMPERATURE DIFFERENTIAL BETWEEN THE OUTER SURFACE OF THE WIRE AND THE TEMPERATURE OF THE MOLTEN ZINC BATH. AFTER HAVING BEEN PASSED THROUGH THE ZINC BATH TO RECEIVE A PRIMARY COATING OF THE ZINC THE WIRE IS PASSED OUT OF THE BATH IN A VERTICAL DIRECTION, AGAIN PLACED IN CONTACT WITH AN ELECTRIC CHARGE BAR WHICH MAINTAINS THE WIRE AT A HIGH TEMPERATURE DURING ITS VERTICAL TRAVEL, THEN CHANGING THE DIRECTION OF TRAVEL AND ALLOWING THE WIRE TO COOL. THEREAFTER IT IS AGAIN SUBJECTED TO IMMERSION IN A MOLTEN ZINC BATH FOR A RELATIVELY SHORT TIME TO RECEIVE FROM ITS FIRST IMMERSION. THE TWICE-COATED WIRE IS THEN TREATED TO AN ELECTRICAL CHARGE AND IS THEN COOLED AND MOVED AWAY FOR FURTHER DISPOSITION.

Inventors

• 👤 J Herman

Bibliographic Details