Metal cleaning composition and process

Claim 2

DESCALING AND DEGREASING COMPOSITION FOR GREASE AND SCALE COATED ALKALI RESISTANT METALS FOR USE IN MOLTEN BATH FORM COMPRISING A MIXTURE OF ABOUT NINETEEN PARTS BY WEIGHT OF ALKALI METAL HYDROXIDE, ABOUT NINETEEN PARTS BY WEIGHT OF ALKALI METAL NITRATE AND ABOUT ONE PART BY WEIGHT OF ALKALI METAL CHLORIDE.

Claim 3

A TWO STEP NON-ELECTROLYTIC PROCESS FOR CLEANING THE SURFACES OF ALKALI RESISTANT METALS, HAVING SUBSTATIAL AMOUNTS OF OXIDIZABLE ORGANIC MATERIALS THEREON, SUCH AS OILS, GREASES ETC., AS WELL AS OXIDIZED PORTIONS OF THE METAL, SUCH AS SCALE ETC., TO BE REMOVED, WHEREIN EACH STEP IS IN THE NATURE OF A CHEMICAL REACTION, AND WHEREIN THE SECOND STEP LEAVES NO ADDED FINISH TO THE SURFACE, AND WHEREIN THE FIRST STEP COMPRISES IMMERSING THE METAL IN A BATH COMPRISING A MOLTEN MIXTURE OF APPROXIMATELY 19 PARTS BY WEIGHT OF ALKALI METAL NITRATE, APPROXIMATELY 19 PARTS BY WEIGHT OF ALKALI METAL HYDROXIDE AND APPROXIMATELY 1 PART BY WEIGHT OF ALKALI METAL CHLORIDE, FOR A PERIOD OF TIME SUFFICIENT TO REMOVE ANY ORGANIC SURFACE IMPURITIES AND CONVERT INORGANIC SURFACE IMPURITIES TO AN OXIDIZED COATING, MORE READILY SOLUBLE THAN WERE THE ORINGAL INORGANIC IMPURITIES, THE OPERATING TEMPERATURE OF THE FIRST BATH BEING ABOVE THE MELTING POINT OF THE MOLTENE MIXTURE, AND WHEREIN THE SECOND STEP COMPRISES IMMERSING THE METAL IN A BATH OF A DILUTE ACID SELECTED FROM THE CLASS CONSISTING OF HYDROCHLORIC AND SULPHURIC ACIDS, WHEREBY WHEN THE METAL IS IMMERSED THEREIN FOR A PROPER PERIOD OF TIME, THE BATH WILL REACT CHEMICALLY WITH THE OXIDIZED COATING TO REMOVE IT, SO AS TO LEAVE THE SURFACE FREE OF THE ORIGINAL IMPURITIES AND OF THE OXIDIZED COATING AS WELL, THE SECOND STEP, HOWEVER, BEING SUCH AS NOT TO EXPOSE AT THE SURFACE OTHER IMPURITIES, NOT PREVIOUSLY EXISTENT, OR NOT PREVIOUSLY EXPOSED, THUS LEAVING THE SURFACE FREE OF ALL INPURITIES AND CONSISTING OF SOLELY OF THE METAL, THE IMMERSION IN THE SECOND BATH BEING SUFFICIENTLY BRIEF SO AS NOT TO PERMIT THE ACID TO ATTACK THE METAL, BUT MERELY TO REMOVE THE OXIDIZED COATING FORMED BY THE FIRST STEP.

Claim 4

A TWO STEP NON-ELECTROLYTIC PROCESS FOR CLEANING THE SURFACES OF ALKALI RESISTANT METALS, HAVING SUBSTATIAL AMOUNTS OF OXIDIZABLE ORGANIC MATERIALS THEREON, SUCH AS OILS, GREASES ETC., AS WELL AS OXIDIZED PORTIONS OF THE METAL, SUCH AS SCALE ETC., TO BE REMOVED, WHEREIN EACH STEP IS IN THE NATURE OF A CHEMICAL REACTION, AND WHEREIN THE SECOND STEP LEAVES NO ADDED FINISH TO THE SURFACE, AND WHEREIN THE FIRST STEP COMPRISES IMMERSING THE METAL IN A BATH COMPRISING A MOLTEN MIXTURE OF APPROXIMATELY 19 PARTS BY WEIGHT OF ALKALI METAL NITRATE, APPROXIMATELY 19 PARTS BY WEIGHT OF ALKALI METAL HYDROXIDE AND APPROXIMATELY 1 PART BY WEIGHT OF ALKALI METAL CHLORIDE, FOR A PERIOD OF TIME SUFFICIENT TO REMOVE ANY ORGANIC SURFACE IMPURITIES AND CONVERT INORGANIC SURFACE IMPURITIES TO AN OXIDIZED COATING, MORE READILY SOLUBLE THAN WERE THE ORINGAL INORGANIC IMPURITIES, THE OPERATING TEMPERATURE OF THE FIRST BATH BEING ABOVE THE MELTING POINT OF THE MOLTENE MIXTURE, AND WHEREIN THE SECOND STEP COMPRISES IMMERSING THE METAL IN A BATH OF A DILUTE ACID SELECTED FROM THE CLASS CONSISTING OF HYDROCHLORIC AND SULPHURIC ACIDS, WHEREBY WHEN THE METAL IS IMMERSED THEREIN FOR A PROPER PERIOD OF TIME, THE BATH WILL REACT CHEMICALLY WITH THE OXIDIZED COATING TO REMOVE IT, SO AS TO LEAVE THE SURFACE FREE OF THE ORIGINAL IMPURITIES AND OF THE OXIDIZED COATING AS WELL, THE SECOND STEP, HOWEVER, BEING SUCH AS NOT TO EXPOSE AT THE SURFACE OTHER IMPURITIES, NOT PREVIOUSLY EXISTENT, OR NOT PREVIOUSLY EXPOSED, THUS LEAVING THE SURFACE FREE OF ALL INPURITIES AND CONSISTING OF SOLELY OF THE METAL, THE IMMERSION IN THE SECOND BATH BEING SUFFICIENTLY BRIEF SO AS NOT TO PERMIT THE ACID TO ATTACK THE METAL, BUT MERELY TO REMOVE THE OXIDIZED COATING FORMED BY THE FIRST STEP.