Preliminary Requirements

Safety Requirements

WARNING

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

WARNING

MATERIALS USED TO APPLY OR REMOVE THE CONVERSION SOLUTIONS MUST NOT BECOME DRY BECAUSE THEY CAN CAUSE A FIRE. FULLY FLUSH ALL SUCH MATERIALS IN COLD WATER, THEN DISCARD THEM.

Procedure

1. SUBTASK 70-38-02-300-001 Immersion Procedure for Conversion Dipping Solutions

   1. NOTE

      If the parts have been abraded or wet or dry blasted (to the remove surface oxide layer), it is not necessary to acid etch.

      Put the part on to a rack, or into a basket (made of aluminum or stainless steel) and clean the part with one of these tasks: SPM TASK 70-11-03-300-503, SPM TASK 70-11-01-300-503 or SPM TASK 70-11-26-300-503.

   2. Acid Etch:

      NOTE

      To make sure all the surfaces of the part are fully wet, brush the part in the solution.

      1. Put the part fully into one of the solutions made up as specified in SPM TASK 70-38-02-100-501, SUBTASK 70-38-02-160-001.

      2. Flush the part in a flow of clean, cold, water.

      3. Put the part into the phosphoric acid solution (made up to SPM TASK 70-38-02-100-501, SUBTASK 70-38-02-160-002), for 20 to 30 seconds, at ambient temperature (that is, of approximately 68 deg F (20 deg C)).

      4. Flush the part in a flow of clean, cold water.

   3. Put the part into the conversion dipping solution in accordance with the conversion coating chemical manufacturer's instructions. Use one of the solutions in SPM TASK 70-38-02-100-501, SUBTASK 70-38-02-160-004.

   4. Flush the part in a flow of clean, cold water for 15 to 30 seconds.

   5. Do the following to dry the part:

      NOTE

      The necessary time in the solution depends on the number of parts in the tank, and on the size and mass of the parts.

      1. Put the part in one of the solutions in the subsequent list for the time that is necessary to increase the part temperature sufficiently to flash dry:

         1. Deionised water at 60 - 70 deg C (140 - 158 deg F).

         2. A low-strength solution of the applied conversion coating chemical (typically 0.06 - 0.3 g/l (0.01 - 0.04 oz/gal)) at 60 - 70 deg C (140 - 158 deg F).

         3. Clean hot water at 65 deg C (149 deg F) maximum. It is necessary to use continuous overflow to keep the hot water clean, and the hot water must agree with the Potable Water Quality Specifications in TASK 70-10-00-100-501

      2. Remove the part from the solution. If the part has cavities and recesses, rotate the part as soon as possible to flash off the solution.

         1. If the solution on the part does not flash off when the part comes out of the solution, then the time interval that the part stayed in the solution was too short.

   6. Visually examine the part for a constant coating. The color range for the different alloys must be between an iridescent gold and a light golden-brown.

2. SUBTASK 70-38-02-300-002 Brushing Procedure for Brushing Conversion Solutions

   1. If there is grease or oil on the repair area surface, remove the grease or oil. Refer to SPM TASK 70-11-26-300-503.

   2. Rub the repair area surface with a CoMat 05-125 ABRASIVE PAD, SILICON CARBIDE, ULTRA-FINE or CoMat 05-126 ABRASIVE PAD, ALUMINUM OXIDE, VERY FINE to remove oxides from the repair area surface.

   3. Clean the repair area surface with a clean cloth that is wet with solvent. Refer to SPM TASK 70-11-26-300-503.

   4. Use a brush to apply one of the brushing conversion solutions in TASK 70-38-02-100-501, SUBTASK 70-38-02-160-003 until the surface color becomes an iridescent gold to light golden-brown color. The change in color takes approximately two to seven minutes.

   5. Flush the area with clean, cold water.

   6. Dry the area with a warm air-flow or with a clean cloth.

3. SUBTASK 70-38-02-300-003 Touch-up Pen Procedure

   1. If there is grease or oil on the repair area surface, remove the grease or oil. Refer to SPM TASK 70-11-26-300-503.

   2. Rub the repair area surface with a CoMat 05-125 ABRASIVE PAD, SILICON CARBIDE, ULTRA-FINE or CoMat 05-126 ABRASIVE PAD, ALUMINUM OXIDE, VERY FINE to remove oxides from the repair area surface.

   3. Clean the repair area surface with a clean cloth that is wet with solvent. Refer to SPM TASK 70-11-26-300-503.

   4. Apply chromate conversion coating using CoMat 01-574 CONVERSION COATING APPLICATOR PEN pen per manufacturer's instructions.

      1. Check the shelf life of the pen before you use it.