Preliminary Requirements

Safety Requirements

WARNING

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

CAUTION

THE ALKALINE RUST REMOVER CLEANING SOLUTION TANKS USED FOR TITANIUM MUST BE USED ONLY FOR PARTS MADE OF TITANIUM BECAUSE NON-TITANIUM PARTS CAN CAUSE CHEMICAL CHANGES IN THE SOLUTION THAT CAN CAUSE THE SOLUTION TO DAMAGE TITANIUM PARTS.

CAUTION

THE ALKALINE RUST REMOVER TANK USED IN THIS PROCEDURE MUST HAVE A TIMER TO PREVENT TOO MUCH LOSS OF STOCK LOSS BECAUSE OF UNCONTROLLED IMMERSION TIMES.

CAUTION

IF YOU DO THIS PROCEDURE MORE THAN THE NUMBER OF TIMES SPECIFIED AT THE END OF THIS PROCEDURE DURING EACH SHOP VISIT, TOO MUCH STOCK LOSS CAN OCCUR.

Procedure

1. SUBTASK 70-11-06-300-001 Remove the Grease

   1. If there is loose or powdery soil on the part, use a high pressure water spray unit to remove the loose or powdery soil from the part. Refer to SPM TASK 70-10-00-100-501 for high-pressure water spray unit (power washer) information.

   2. If there is grease or oil on the part, degrease the part as specified in SPM TASK 70-11-03-300-503.

2. SUBTASK 70-11-06-300-002 Soak the Part in the Alkaline Rust Remover Solution

   1. Parts should be fully put in to the solution only long enough to get satisfactory cleaning.

      NOTE

      Use Method 1 (Step) or Method 2 (Step) to clean titanium parts.

3. SUBTASK 70-11-06-300-002-A01 Method 1: High Concentration, Short Soak

   1. Soak the part in one of the prepared alkaline rust remover solutions in the subsequent list at a temperature of 180 to 200 deg F (82 to 93 deg C) for one to four minutes. Refer to TASK 70-11-06-100-501 for the solution make-up instructions.

      1. Solution Code 20

      2. Solution Code 23

      3. Solution Code 24

      4. Solution Code 97

4. SUBTASK 70-11-06-300-002-A02 Method 2: Low Concentration, Long Soak

   1. Soak the part in one of the prepared alkaline rust remover solutions in the subsequent list at the applicable temperature 15 to 30 minutes. Refer to TASK 70-11-06-100-501 for the solution make-up instructions.

      1. Solution Code 106 at 176 - 194 deg F (80 - 90 deg C)

      2. Solution Code 108 at 160 - 170 deg F (71 - 77 deg C)

      3. Solution Code 109 at 160 - 170 deg F (71 - 77 deg C)

      4. Solution Code 111 at 160 - 170 deg F (71 - 77 deg C)

      5. Solution Code 192 at 160 to 170 deg F (71 - 77 deg C).

5. SUBTASK 70-11-06-300-003 Clean and Dry the Part

   1. Use pressure to flush the part with water, above the alkaline solution tank.

   2. Flush the part momentarily in cold water.

   3. Use pressure to flush the part with cold water.

   4. Do an inspection of the part to make sure that the part is clean.

      1. Use a Nylon brush, a Tampico brush, a CoMat 05-125 ABRASIVE PAD, SILICON CARBIDE, ULTRA-FINE, or a CoMat 05-126 ABRASIVE PAD, ALUMINUM OXIDE, VERY FINE to clean the part surfaces that are not clean.

      2. If the part is not clean, then it is permitted to do this procedure again one more time only.

      3. It is permitted to do this procedure a maximum of two times during each shop visit.

   5. Flash Dry the Part

      1. Parts to be Stress-Relieved

         1. 

            CAUTION

            PARTS THAT ARE TO BE STRESS-RELIEVED MUST BE FLUSHED IN HOT DE-IONIZED WATER ONLY. THIS IS TO PREVENT THE RISK OF STRESS CORROSION CRACKING.

            Put the part fully in CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER distilled or deionized water at a temperature of 150 to 200 deg F (66 to 93 deg C) to increase the temperature of the part sufficiently to flash dry.

            NOTE

            If the part is cleaned in preparation for thermal heat treatment, then the water in the CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER distilled or deionized water tank must be controlled to 10 PPM maximum of chloride and/or halogens, or 20 microSiemens/centimeter maximum conductivity.

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

            1. If the water on the part does not flash off when the part comes out of the hot water, then the time in the hot water was not sufficient.

      2. Parts that do not require Stress-Relief

         1. Put the part fully in clean hot water (see note) or CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER at a temperature of 150 to 200 deg F (66 to 93 deg C) to increase the temperature of the part sufficiently to flash dry.

            NOTE

            The clean hot water rinse should be made up with water that contains not more than 100 PPM chloride or halide and must be discarded if the concentration of chloride or halide in the clean hot water rinse becomes more than 250 PPM.

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

            1. If the water on the part does not flash off when the part comes out of the hot water, then the time in the hot water was not sufficient.