Abstract 1. A HEDAVALENT CHROMIUM-FREE PULVERULENT COMPOSITION FOR DISSOLUTION IN WATER TO RPOVIDE A BRIGHT DIP FOR ZINC AND CADMIUM SURFACES, SAID COMPOSITION CONSISTING ESSENTIALLY OF (A) FROM 15% TO 99.8% BY WEIGHT OF A WATER-SOLUBLE NITRATE SALT; (B) UP TO 80% BY WEIGHT OF AN ACID SALT SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM AND AMMONIUM BISULFATES AND SULFAMIC ACID; (C) FROM .2% TO 15% BY WEIGHT OF A WATER-SOLUBLE FLUORIDE SALT; (D) UP TO 15% BY WEIGHT OF CITRIC ACID; (E) UP TO 15% BY WEIGHT OF A TRIVELENT CHROMIUM COMPOUND; (F) UP TO 15% BY WEIGHT OF AN ACID SOLUBLE OXIDATION RESISTANT ORGANIC SYE; WHEREIN THE AMOUNT OF ACID SALT IN COMPOSITION IS ALWAYS SUFFICIENT TO PRODUCE A PH OF FROM 4.0 TO 0.5 UPON ADDITION OF FROM 0.3 TO 6 OZS. OF SAID COMPOSITION PER GALLON OF WATER.
A HEDAVALENT CHROMIUM-FREE PULVERULENT COMPOSITION FOR DISSOLUTION IN WATER TO RPOVIDE A BRIGHT DIP FOR ZINC AND CADMIUM SURFACES, SAID COMPOSITION CONSISTING ESSENTIALLY OF (A) FROM 15% TO 99.8% BY WEIGHT OF A WATER-SOLUBLE NITRATE SALT; (B) UP TO 80% BY WEIGHT OF AN ACID SALT SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM AND AMMONIUM BISULFATES AND SULFAMIC ACID; (C) FROM .2% TO 15% BY WEIGHT OF A WATER-SOLUBLE FLUORIDE SALT; (D) UP TO 15% BY WEIGHT OF CITRIC ACID; (E) UP TO 15% BY WEIGHT OF A TRIVELENT CHROMIUM COMPOUND; (F) UP TO 15% BY WEIGHT OF AN ACID SOLUBLE OXIDATION RESISTANT ORGANIC SYE; WHEREIN THE AMOUNT OF ACID SALT IN COMPOSITION IS ALWAYS SUFFICIENT TO PRODUCE A PH OF FROM 4.0 TO 0.5 UPON ADDITION OF FROM 0.3 TO 6 OZS. OF SAID COMPOSITION PER GALLON OF WATER.
Claim 2
Dependent Claim
141 words
A HEDAVALENT CHROMIUM-FREE PULVERULENT COMPOSITION FOR DISSOLUTION IN WATER TO RPOVIDE A BRIGHT DIP FOR ZINC AND CADMIUM SURFACES, SAID COMPOSITION CONSISTING ESSENTIALLY OF (A) FROM 15% TO 99.8% BY WEIGHT OF A WATER-SOLUBLE NITRATE SALT; (B) UP TO 80% BY WEIGHT OF AN ACID SALT SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM AND AMMONIUM BISULFATES AND SULFAMIC ACID; (C) FROM .2% TO 15% BY WEIGHT OF A WATER-SOLUBLE FLUORIDE SALT; (D) UP TO 15% BY WEIGHT OF CITRIC ACID; (E) UP TO 15% BY WEIGHT OF A TRIVELENT CHROMIUM COMPOUND; (F) UP TO 15% BY WEIGHT OF AN ACID SOLUBLE OXIDATION RESISTANT ORGANIC SYE; WHEREIN THE AMOUNT OF ACID SALT IN COMPOSITION IS ALWAYS SUFFICIENT TO PRODUCE A PH OF FROM 4.0 TO 0.5 UPON ADDITION OF FROM 0.3 TO 6 OZS. OF SAID COMPOSITION PER GALLON OF WATER.