(i)  
Use a clean cheesecloth that is moist with naptha to remove all remaining particles.

 (j)  
If microscopic or small holes show on the 8-W-5 surface: 1) Rub the surface smooth. 2) Clean the surface to remove remaining particles. 3) Apply Magan 28-C-1 static conditioner again. 4) Immediately apply the subsequent layers.

 S 107-025-B00
 (6)  Do these steps for surfaces with no paint and for surfaces without surface porosity.
 (a)  
Use Scothchbrite sheets and clean water to make the surface rough.

 (b)  
Use a cheesecloth that is moist with water to clean the surface. Clean the surface again to remove all remaining particles.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 51-21-21
 ALL  ú ú B01 Page 709 ú Jul 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 CORROSION REMOVAL AND CONTROL - CLEANING/PAINTING
_________________________________________________
 1.  General_______
 A.  This procedure contains one task. The task is the removal and control of corrosion.
 TASK 51-21-31-307-001-B00
 2.  Remove and Control Corrosion____________________________
 A.  General
 (1)  
The procedures in the maintenance manual are for light corrosion only. Refer to the Structural Repair Manual for heavy corrosion.

 (2)  
It is important to carefully examine all structural parts for corrosion.

 (3)  
You must replace or repair all parts that have corrosion. If you cannot remove the part from the airplane, use the applicable procedure to remove the corrosion.

 (4)  
When you remove corrosion, make sure you remove all the corrosion. Failure to remove all the corrosion permits corrosion to start again.

 (5)  
If you cannot remove the light corrosion immediately, apply BMS 3-23 to help prevent more corrosion. Then you must remove the corrosion at the first available opportunity. BMS 3-23 should not be used on surfaces where more than light corrosion is involved.

 (6)  
Acid brighteners for aluminum can cause illness and you must use them only when it is necessary. Phosphoric acid type corrosion remover is weak and will not affect metal surfaces.

 B.  Equipment
 (1)  Cleaning brushes, nylon and wire
 C.  Consumable Materials
 (1)  
B00002 Metal Glo No. 6

 (2)  
B00137 Abrasive paper, aluminum oxide, 220 and
 400-grit

 (3)  
B00312 Aluminum wool

 (4)  
B00446 Stainless steel wool

 (5)  
C00064 Coating - Surface Treatment -MIL-C-5541, Type II, Grade C. Class 1
 for Aluminum or Aluminum Alloys (Alodine
 Coating) Alodine 1000 Clear, Alodine
 1200.

 (6)  
G00034 Cheesecloth - New, Clean, Dry, Lint Free

 (7)  
E00079 Stripper - Inorganic, Chromic Acid

 (8)  
G00009 Compound - Corrosion Inhibiting BMS 3-23

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 51-21-31
 ALL  ú ú B02 Page 701 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (9)  
B00047 Remover - Corrosion Spec. 0-A-88 Nitric
 acid

 (10)
 Remover - Corrosion, Phosphoric Acid Type
 (For aluminum):

 (a)  B00285 Kelite Process K
 NOTE: Add 8 parts (by volume) of water.
____
 (b)  B00288 Turco W.O.1
 NOTE: Add 6 parts (by volume) of water.
____
 (c)  B00162 Oakite 36
 NOTE: Add 4 parts (by volume) of water.
____
 (11) Remover - Corrosion, Phosphoric Acid Type
 (For steel):

 NOTE: Add 3 parts (by volume) of water.
____
 (a)  
B00046 GMC 801

 (b)  
B00285 Kelite Process K

 (c)  
B00170 Oakite 31

 (d)  
　
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