Process for applying fused metal coating onto metal base and adhesive used therein

Claim 1

A PROCESS FOR FUSION BONDING A METAL COATING ONTO A METAL ARTICLE HAVING A RELATIVELY HIGHER MELTING POINT WHICH INCLUDES THE STEPS OF APPLYING TO ANY SURFACE OF SAID ARTICLE DESIRED TO BE COATED A FILM OF LIQUID ADHESIVE CONSISTING ESSENTIALLY OF WATER SOLUBLE PROPORTION OF WATER GLASS AND BORAX INTO WHICH A METAL POWDER HAVING A MAXIMUM PARTICLE SIZE IN THE ORDER OF 20 MICRONS AND A MELTING POINT ABOVE THE FUSION BONDING TEMPERATURE HAS BEEN MIXED IN SUFFICIENT QUANTITY AND WITH SUFFICIENT WATER TO PROVIDE A PAINT, CONSISTENCY, APPLYING TO SAID LIQUID ADHESIVE FILM AN EXCESS OF A NONEUTECTIC METAL ALLOY COATING IN GRANULATED PARTICLES EXCEEDING THE THICKNESS OF SAID ADHESIVE FILM AND WITHIN A RANGE OF THROUGH 30 RETAINED ON 325 MESH HAVING A SUBSTANTIAL PLASTIC TEMPERATURE RANGE BETWEEN LIQUIDUS AND SOLIDUS POINTS BELOW THE MELTING POINT OF SAID METAL ARTICLE AND WITHIN A TEMPERATURE RANGE OF 1500* TO 2500* F., REMOVING FROM SAID ARTICLE THE EXCESS OF GRANULATED COATING ALLOY OTHER THAN THE SUBSTANTIALLY SINGLE LAYER RETAINED BY SAID ADHESIVE FILM, DRYING SAID ADHESIVE, AND HEATING SAID SURFACE TO A TEMPERATURE WITHIN SAID PLASTIC RANGE AT WHICH SAID COATING ALLOY WILL DISPLACE THE NONVOLATIEL WATER GLASS AND BORAX INGREDIENTS AND FUSION BOND WITH SAID METAL ARTICLE BY SUBMERGINE SAID ARTICLE IN A FUSED BATH OF BORIC OXIDE HAVING A CORRESPONDING TEMPERATURE.