标准施工手册 STANDARD PRACTICES MANUAL 20-00-02/70-00-01(65)

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WARNING: USE EXTREME CAUTION TO PREVENT CONTACT WITH SKIN.  IF POWDER OR MIXED SOLUTION COMES IN CONTACT WITH SKIN, FLUSH OFF IMMEDIATELY WITH WATER. DO NOT INHALE DUST FROM POWDERS OR VAPORS FROM THE SOLUTION.
Prepare magnesium touch-up solution (Dow 19) as follows:
WARNING: USE CORRECT PERSONAL PROTECTION.  THIS CHEMICAL SOLUTION CAN CAUSE SKIN, EYE AND LUNG DAMAGE. THE DANGER AND PRECAUTIONS FOR EACH CHEMICAL IS DIFFERENT.
(1)  
Mix 1.3 ounces (38,44 mL) of chromic acid flake (SECTION VII) and one ounce of calcium sulfate (SECTION VII) with enough distilled or de-ionized water to make one gallon (3,78 L) of solution.

(2)  
Stir solution vigorously for at least 15 minutes to ensure saturation of the solution with calcium sulfate.

(3)  
Maintain solution at 160 to 200F (71 to 93C).

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I.  Method No. 402J: Primer Mixing Instructions
Prepare primer as follows:

(1)  
Mix equal parts, by volume, of primer (flat green) (535K020/930K097, Color # 34151) (SECTION VII).

(2)  
Allow to stand 30 minutes before use.

J.  Method No. 402K: Color-coat Mixing Instructions
Prepare color-coat as follows:

(1)  
Light Green Coating

(a)  
Mix equal parts, by volume, of paint, color-coat enamel (535K022/930K105, Color # 14670) (SECTION VII).

(b)  
Allow to stand 30 minutes before use.

 

(2)  
Gloss Blue Coating

(a)  
Mix equal parts, by volume, of paint, color-coat enamel (536K004/930K105, Color # 15187) (SECTION VII).

(b)  
Allow to stand 30 minutes before use.

 

(3)  
Black Coating

(a)  
Mix equal parts, by volume, of paint, gloss black (538K008/930K105, Color # 17038) (SECTION VII).

(b)  
Allow to stand 30 minutes before use.

 

3.  Repair and Application of Protective Coatings and Plating
A.  Method No. 403A: Anodized Aluminum and Aluminum-alloy Repair
Repair anodized aluminum and aluminum-alloy parts as follows:

(1)  Remove anodize.
WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE.  DO NOT INHALE VAPORS. OBSERVE FIRE PRECAUTIONS.
(a)  Clean part with solvent (Federal Specification P-D-680, Type I) (SECTION VII) to remove oil and grease contamination.
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WARNING: USE CORRECT PERSONAL PROTECTION.  ALKALINE CLEANING SOLUTIONS ARE HAZARDOUS. AVOID INHALING FUMES OR MIST. AVOID CONTACT WITH SKIN. AFTER USE, WASH HANDS AND FACE THOROUGHLY.
(b)  
Immerse part in alkaline cleaner solution (Method No. 402A) for five minutes minimum.

(c)  
Scrub surface with a stiff bristled brush to remove surface contamination.

NOTE:  If old gaskets or sealing compound are present, lift softened gaskets with a knife blade and scrape surface clean.

(d)  
Rinse part with water at 80 to 110F (27 to 43C).

WARNING: USE CORRECT PERSONAL PROTECTION.  COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. COMPRESSED AIRFLOW CAN CAUSE CUTS, DO NOT POINT IT AT YOUR SKIN.

(e)  
Use low pressure air (20 psig (137,89 kPa) maximum) to dry part.

(f)  
Immerse part in anodize stripper solution (Method No. 402B) until anodize finish is removed.

(g)  
Repeat Sub-steps (b), (c) and (d) to clean part.

CAUTION: DO NOT ALLOW PART TO REMAIN IN CONTACT WITH DE-OXIDIZING SOLUTION LONGER THAN THREE (3) MINUTES OR CHEMICAL ETCHING WILL OCCUR.

(h)  
Immerse part in de-oxidizer solution (Method No. 402C) for one to three minutes.

(i)  
Repeat Sub-step (c) and (d) to rinse and dry part.

　
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