Preliminary Requirements

Safety Requirements

WARNING

YOU MUST HAVE ON PROTECTIVE GLOVES TO MAKE SURE THESE MATERIALS DO NOT TOUCH YOUR SKIN. APPROVED HAND CREAMS MUST BE USED BEFORE AND AFTER WORK.

WARNING

YOU MUST IMMEDIATELY REMOVE SMALL AMOUNTS OF UNWANTED PAINT FROM YOUR SKIN WITH AN APPROVED CREAM AND THEN IMMEDIATELY WASH YOUR SKIN.

WARNING

YOU MUST GET IMMEDIATE MEDICAL HELP IF SMALL AMOUNTS OF UNWANTED PAINT GO INTO YOUR EYES OR MOUTH.

WARNING

THESE MATERIALS ALL HAVE FLASH POINTS BELOW 73 DEG F (23 DEG C) AND ARE HIGHLY INFLAMMABLE. FULLY FLAME-PROOF EQUIPMENT AND EQUIPMENT TO REMOVE UNWANTED GAS MUST BE USED WHEN THE MATERIALS ARE MIXED OR APPLIED.

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 CHARACTERISITSC, 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 70-38-07-380-001 The Procedure to Apply a General Protective Layer

   1. Prepare the parts.

      1. Remove paint from the parts as given in the SPM TASK 70-11-10-300-503.

      2. Magnesium parts must be chromated as given in TASK 70-38-33-300-503. Then oven dry at a temperature of between 250 and 300 deg F (120 to 150 deg C) for 1 hour.

      3. Aluminum parts must be prepared as given in the SPM TASK 70-38-02-300-503. Then put the parts in to an oven to dry at a temperature of between 250 and 300 deg F (120 to 150 deg C) for 1 hour.

      4. Abrasive blast steel parts as given in the SPM TASK 70-12-01-120-501. Then put the parts in to an oven to dry at a temperature of between 250 and 300 deg F (120 to 150 deg C) for 1 hour.

   2. Vapor degrease the parts as given in the SPM TASK 70-11-01-300-503.

   3. Apply CoMat 02-019 TAPE, ADHESIVE PAPER HEAT RESISTING MASKING or the correct covers to areas which are not to be painted. Unwanted paint can be removed with the use of a lint-free cloth which is moist with CoMat 07-031 PRIMER THINNERS.

   4. Mix the primer.

      1. Mix together equal volumes of the two materials of CoMat 07-030 TWO-PACK EPOXY AIR DRYING PRIMER, GREY. Make sure the compound is fully mixed.

      2. NOTE

         To prevent a problem in very hot temperatures the primer can be applied immediately after it is mixed.

         Do not use the primer for approximately 30 minutes.

      3. If you use a spray gun, the viscosity of the primer is to be between 16 and 20 seconds B.S.3900 Part 6 Flow Cup Type B4 at 68 deg F (20 deg C) and must be measured before use. The viscosity can be changed with the use of CoMat 07-031 PRIMER THINNERS.

      4. Immediately clean all equipment with CoMat 07-034 BRUSH WASH after use.

   5. NOTE

      It is not necessary to let the parts become dry before polymerization in conveyor ovens. It is essential to let them become dry before polymerization in a static oven.

      Apply the primer.

      1. Apply with a spray gun one layer of the primer compound. Let the primer become dry for 10 minutes.

      2. If only a thin layer of primer is permitted on a part, remove unwanted primer as follows:

         1. Remove unwanted primer from the part with a lint-free cloth which is moist with CoMat 07-031 PRIMER THINNERS. Do not apply one more layer of primer to these parts.

      3. Apply with a spray gun one more layer of primer to give a minimum dry layer thickness of 0.001in (0.025 mm). Let the part become dry for 15 to 20 minutes if necessary.

      4. Do steps E.(1) and E.(3) again if it is necessary to give magnesium parts maximum protection. Let the parts become dry for 10 minutes if necessary.

      5. To polymerize the primer, heat the parts to between 248 and 266 deg F (120 to 130 deg C) and maintain this temperature for a minimum of 30 minutes. Alternatively let the parts become dry at a minimum temperature of 60 deg F (16 deg C) for 4 hours.

   6. Mix the enamel.

      1. Mix together two volumes of enamel base FE93 with one volume of activator No. 93 from CoMat 07-032 ENAMEL, POLYURETHANE, AIR-DRYING, TWO-PART, GREY.

      2. NOTE

         To prevent a problem in very hot temperatures the enamel can be applied immediately after it is mixed.

         Do not use the enamel for approximately 30 minutes.

      3. NOTE

         The thinners used are not interchangeable between primer and enamel.

         All equipment used must be clean and dry. Moist equipment will have an effect on the activator used.

         If you use a spray gun, the viscosity of the enamel is to be between 14 and 18 seconds B.S.3900 Part A6 Flow Cup Type B4 at 68 deg F (20 deg C) and must be measured before use. The viscosity can be changed with the use of CoMat 07-033 POLYURETHANE THINNER.

   7. NOTE

      It is not necessary to let the parts become dry before polymerization in conveyor ovens. It is essential to let them become dry before polymerization in a static oven.

      Apply the enamel finish.

      1. Apply with a spray gun one layer of the enamel compound. Let the part become dry for 10 minutes if necessary.

      2. Apply with a spray gun one more layer of the enamel to give a minimum dry layer thickness of 0.001in (0.025 mm). Let the part become dry for 10 minutes if necessary.

      3. Do Step and Step again if it is necessary to give magnesium parts maximum protection. Let the parts become dry for 10 minutes if necessary.

      4. To polymerize the enamel, heat the parts to between 248 and 266 deg F (120 to 130 deg C) and maintain this temperature for a minimum of 30 minutes. Alternatively let the parts become dry at a minimum temperature of 60 deg F (16 deg C) for 6 hours.

   8. Inspect the protective layer.

      1. The protective layer must be a constant color and fully cover all necessary surfaces. There must be no runs, drops, tears, blisters or equivalent defects in the protective layer.

      2. The protective layer thickness (primer and enamel) on magnesium parts which have had maximum protection applied must be between 0.004 and 0.008in (0.101 to 0.203 mm). On all other parts this thickness must be between 0.002 and 0.004in (0.050 to 0.101 mm). This thickness must be measured with an approved instrument.

      3. If the general protective layer is unsatisfactory remove the layer as given in the SPM TASK 70-11-10-300-503, then do steps 4.B. to H. again. If only small areas are unsatisfactory, refer to Step.

2. SUBTASK 70-38-07-380-002 The Procedure to Apply a Local Protective Layer

   1. Use CoMat 05-021 WATERPROOF SILICON CARBIDE to prepare the area where the protective layer is to be applied.

   2. Make sure you do not damage the metal pre-treatment. If it is necessary to repair the metal pre-treatment refer to the applicable Standard Process.

   3. Cold liquid degrease the parts as given in the SPM TASK 70-11-14-300-503.

   4. Mix the primer.

      1. Mix together equal volumes of the two materials of CoMat 07-030 TWO-PACK EPOXY AIR DRYING PRIMER, GREY. Make sure the compound is fully mixed.

         NOTE

         To prevent a problem in very hot temperatures the primer can be applied immediately after it is mixed.

      2. Do not use the primer for approximately 30 minutes.

      3. If you use a spray gun, the viscosity of the primer is to be between 16 and 20 seconds B.S.3900 Part 6 Flow Cup Type B4 at 68 deg F (20 deg C) and must be measured before use. The viscosity can be changed with the use of CoMat 07-031 PRIMER THINNERS.

      4. Immediately clean all equipment with CoMat 07-034 BRUSH WASH after use.

   5. Use a spray gun or CoMat 02-004 PAINT BRUSH to apply one layer of primer. Let the part become dry for 10 minutes.

   6. Heat the part to between 248 and 266 deg F (120 to 130 deg C) and maintain at this temperature for a minimum of 30 minutes. Alternatively let the parts become dry at a minimum temperature of 60 deg F (16 deg C) for 4 hours.

   7. Mix the enamel.

      1. Mix together two volumes of enamel base FE93 with one volume of activator No. 93 from CoMat 07-032 ENAMEL, POLYURETHANE, AIR-DRYING, TWO-PART, GREY.

      2. NOTE

         To prevent a problem in very hot temperatures the enamel can be applied immediately after it is mixed.

         Do not use the enamel for approximately 30 minutes.

      3. NOTE

         The thinners used are not interchangeable between primer and enamel.

         All equipment used must be clean and dry. Moist equipment will have an effect on the activator used.

         If you use a spray gun, the viscosity of the enamel is to be between 14 and 18 seconds B.S.3900 Part A6 Flow Cup Type B4 at 68 deg F (20 deg C) and must be measured before use. The viscosity can be changed with the use of CoMat 07-033 POLYURETHANE THINNER.

      4. Immediately clean all equipment with CoMat 07-034 BRUSH WASH after use.

   8. Use a spray gun or CoMat 02-004 PAINT BRUSH to apply one layer of enamel. Let the part become dry for 10 minutes.

   9. Heat the part to between 248 and 266 deg F (120 to 130 deg C) and maintain at this temperature for a minimum of 30 minutes. Alternatively let the parts become dry at a minimum temperature of 60 deg F (16 deg C) for 6 hours.