Preliminary Requirements

Safety Requirements

WARNING

IT IS THE RESPONSIBILITY OF THE OPERATOR TO OBTAIN AND OBSERVE THE MANUFACTURERS MATERIAL SAFETY DATA SHEETS FOR CONSUMABLE MATERIALS INFORMATION SUCH AS, HAZARDOUS INGREDIENTS, PHYSICAL/CHEMICAL CHARACTERISTICS, FIRE, EXPLOSION, REACTIVITY, HEALTH HAZARD DATA, PRECAUTIONS FOR SAFE HANDLING, USE AND CONTROL MEASURES AND ALSO TO TAKE LOCAL REGULATIONS INTO CONSIDERATION.

WARNING

THIS PROCEDURE INCLUDES THE USE OF SODIUM CYANIDE. CYANIDE SALTS AND/OR SOLUTIONS ARE VERY POISONOUS AND WORK VERY QUICKLY. THEY GIVE OFF HYDRO-CYANIC GAS, WHEN MIXED WITH ACID, WHICH CAN KILL. THE PRECAUTIONS THAT FOLLOW MUST ALWAYS BE OBEYED.

WARNING

CYANIDE SALTS AND SOLUTIONS MUST ALWAYS BE KEPT AWAY FROM ACIDS.

WARNING

THERE MUST BE SUFFICIENT VENTILATION.

WARNING

YOU MUST NOT LET NICKEL STRIPPING SALTS TOUCH PAPER, WOOD, CLOTH, OR ANY ORGANIC MATERIAL OTHER THAN NEOPRENE.

WARNING

YOU MUST USE STEEL, STAINLESS STEEL OR NEOPRENE SCOOPS AND CONTAINERS.

WARNING

THE USUAL PRECAUTIONS FOR HOT CYANIDE SOLUTIONS ARE APPLICABLE TO THESE SOLUTIONS.

WARNING

OPERATORS MUST ALWAYS USE THE APPROVED PROTECTIVE CLOTHING SUPPLIED.

WARNING

FINGER NAILS MUST BE KEPT SHORT AND MUST ALWAYS BE FULLY CLEANED BEFORE YOU EAT, DRINK OR SMOKE.

WARNING

ITEMS THAT ARE USED TO EAT OR DRINK WITH MUST NOT BE KEPT AT LOCATIONS WHERE CYANIDE IS KEPT OR USED. ALSO, YOU MUST NOT EAT, DRINK OR SMOKE, AT SUCH LOCATIONS.

WARNING

CYANIDE MUST ALWAYS BE KEPT AT A SAFE LOCATION, WHERE ACCESS IS ONLY AVAILABLE TO APPROVED PERSONS.

WARNING

CYANIDE SOLUTION PRECAUTIONS:

POISONING WILL OCCUR IF YOU SWALLOW CYANIDE, BREATHE HYDROCYANIC GAS OR IF CYANIDE OR HYDROCYANIC GAS ABSORBS THROUGH YOUR SKIN.

WARNING INDICATIONS OF POISONING ARE DIZZINESS, NAUSEA, GENERAL WEAKNESS AND HEADACHE, PALPITATIONS, FEELING OF SUFFOCATION AND TIGHTNESS IN THROAT, PALLOR, DEEP BREATHING AND UNCONSCIOUSNESS.

WARNING

A SUPPLY OF CYANIDE ANTIDOTE MUST ALWAYS BE EASILY AVAILABLE.

WARNING

ALL INSTRUCTIONS GIVEN BY THE SAFETY OFFICER MUST BE OBEYED.

Procedure

1. SUBTASK 70-33-80-100-001 The Make-up of the PS 316 Nickel Strip Solution

   1. The nickel strip solution consists of the following:

      1. CoMat 01-178 NICKEL STRIP SALT, CoMat 01-179 NICKEL STRIP SALT, CoMat 01-180 NICKEL STRIP SALT, CoMat 01-181 NICKEL STRIP SALT, or CoMat 01-182 NICKEL STRIP SALT at a concentration of 8 oz/gal (60 g/l).

      2. CoMat 01-063 SODIUM CYANIDE NaCN at a concentration of 16 oz/gal (120 g/l).

         1. The permissible limits for sodium cyanide are 12 to 18 oz/gal (90 to 135 g/l).

   2. Preparation.

      1. Fill the tank with the required amount of tap water.

      2. Heat the water to a temperature of 130 to 175 deg F (54 to 79 deg C).

      3. Add the required amount of the selected nickel strip salt.

      4. Stir the solution to mix.

      5. Slowly and cautiously add the required amount of the CoMat 01-063 SODIUM CYANIDE NaCN.

      6. Stir the solution to mix.

         NOTE

         When the stripping rate becomes impractical, 2 oz/gal (15 g/l) of the nickel strip salt can be added to the solution to improve the rate.

         Discard the solution when additions of the nickel strip salt no longer improve the solution.

      7. Heat the solution to the temperature of 90 to 110 deg F (32 to 43 deg C).

   3. Test the solution weekly for free sodium cyanide (refer to SUBTASK 70-33-80-200-001).

2. SUBTASK 70-33-80-100-002 The Make-up of the SPS-26 Nickel Strip Solution

   1. The nickel strip solution consists of the following:

      1. CoMat 01-192 NICKEL STRIP COMPOUND or CoMat 01-194 NICKEL STRIP COMPOUND at a concentration of 25 oz/gal (187.5 g/l).

      2. The operating limits of CoMat 01-063 SODIUM CYANIDE NaCN must be 12 to 18 oz/gal (90 to 135 g/l).

   2. Preparation.

      1. Fill the tank with the required amount of water.

      2. Heat the water to a temperature of 130 to 175 deg F (54 to 79 deg C).

      3. Slowly and cautionsly add the required amount of the selected nickel strip compound.

      4. Stir the solution to mix.

         NOTE

         When the stripping rate becomes impractical, 5 oz/gal (37.5 g/l) of the nickel strip compound can be added to the solution to improve the rate.

         Discard the solution when additions of the nickel strip compound no longer improve the solution.

      5. Heat the solution to the temperature 90 to 110 deg F (32 to 43 deg C).

   3. Test the solution every two weeks for free sodium cyanide (refer to SUBTASK 70-33-80-200-001).