Preliminary Requirements

Safety Requirements

WARNING

IT IS THE RESPONSIBILITY OF THE OPERATOR TO OBTAIN AND OBSERVE THE MANUFACTURERS 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.

Procedure

1. SUBTASK 70-11-39-100-001 Make-up of the Solution

   1. NOTE

      Alternative solutions can be used, when specified in the related Engine Manual.

      Composition.

      1. This procedure uses CoMat 01-103 FERRIC CHLORIDE HEXAHYDRATE and CoMat 01-099A HYDROCHLORIC ACID to make a solution that has a nominal concentration of 270 g/l ferric chloride (anhydrous) and 110 g/l hydrochloric acid. The operation limits of the solution are 250 to 300 g/l ferric chloride (anhydrous) and 100 to 120 g/l hydrochloric acid.

   2. Make-up.

      1. NOTE

         It is known that impurities in the form of arsenic, molybdenum and sulfur, in the etching solution can accumulate to an amount that will prevent a satisfactory etch. Therefore, rubber containing a high percentage of sulfur must not be used for jigs, tank linings or baskets.

         A grade of ferric chloride containing the lowest possible amount of arsenic should be chosen for making up the solution. Build up of molybdenum (Which is a constituent of some blades) can be avoided by frequent renewal of the solution.

         The solution must be discarded and renewed when 4 sq. meters of surface area have been processed for each 5 liters of solution. It is therefore recommended that the tank size be just sufficient for the quantity of parts to be processed.

         To make 1 liter of solution, use the subsequent procedure:

         1. Put approximately 650 ml water in a satisfactory container.

         2. Add 417 - 499 g CoMat 01-103 FERRIC CHLORIDE HEXAHYDRATE. Mix the solution to fully dissolve the CoMat 01-103 FERRIC CHLORIDE HEXAHYDRATE.

         3. Carefully add 313 - 376 ml CoMat 01-099A HYDROCHLORIC ACID. Mix the solution.

         4. Carefully add water to increase the volume of the solution to 1 liter.

      2. To make 1 gallon of solution, use the subsequent procedure:

         1. Put approximately 2/3 gal water in a satisfactory container.

         2. Add 56 - 66 oz CoMat 01-103 FERRIC CHLORIDE HEXAHYDRATE. Mix the solution to fully dissolve the CoMat 01-103 FERRIC CHLORIDE HEXAHYDRATE.

         3. Carefully add 40 - 48 oz CoMat 01-099A HYDROCHLORIC ACID. Mix the solution.

         4. Carefully add water to increase the volume of the solution to 1 gallon.