Method of producing fusion coated metal base

Claim 1

A PROCESS FOR MAKING A NICKEL-CHROMIUM ALLOY COATED STEEL BASE HAVING SUFFICIENT DUTILITY AND FORMABILITY FOR FABRICATING PURPOSES WHICH COMPRISES APPLYING TO A STEEL BASE IN COLD HARD SHEET OR STRIP FORM A POWDERED ALLOY OF NICKEL, CHROMIUN, AND PHOSPHORUS IN AN AMOUNT TO PROVIDE FROM ABOUT 1 TO ABOUT 4 GRAMS OF SAID ALLOY PER SQUARE FOOT OF COATED SURFACE, SAID ALLOY CONSISTING ESSENTIALLY OF FROM ABOUT 5 WT. PERCENT OT ABOUT 20 WT. PERCENT CHROMIUM, FROM ABOUT 7 WT. PERCENT TO ABOUT 13 WT. PERCENT PHOSPHORUS, AND THE BALANCE NICKEL, HEATING THE STEEL BASE IN A PROTECTIVE NON-OXIDIZING ATMOSPHERE AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO MELT THE POWDERED ALLOY, CONTROLLING THE MOISTURE CONTENT OF SAID ATMOSPHERE TO MAINTAIN A DEW POINT NOT GRATER THAN ABOUT -5*F. WHEREBY TO PROVIDE A CONTINUOUS FUSION COATING OF SAID ALLOY ON THE SURFACE OF SAID BASE, AND SUBSEQUENTLY TREATING THE COATED BASE TO THE PHYSICAL OR MECHANICAL PROPERTIES OF THE STEEL BASE WITHOUT IMPAIRMENT OF THE DUCTILITY AND FORMABILITY OF SAID COATING.