Cessna 510 Mustang Structural Repair Manual page 36

5. Manual Deoxidizing
A. General Requirements
(1) Whenever possible use ScotchBrite to abrade surfaces.
(2) Use 320 grit or finer abrasive cloth or sandpaper with either power or hand tools.
(3) If heavy layers of scale or oxide are to be removed and the surface finished by subsequent operations or processes,
a metallic brush (Refer to Table 2) or 150 grit (maximum) abrasive cloth or sandpaper may be used for cleaning.
(4) Assemblies fabricated from dissimilar metals must not be wire brushed with the same brush or cleaned with the
same abrasive cloth or paper.
(5) Parts and assemblies must be cleaned after abrasive cleaning to make sure of removal of all dirt.
(a) All loose particles must be immediately removed from parts by a jet of air and cloth wiped upon completion of
abrasive cleaning. Care must be taken to make sure that surfaces next to the surface to be abrasively cleaned
are not damaged by any part of the cleaning process.
(b) If that part is to receive corrosion protective treatment, manual deoxidizing must be done next and loose
particles removed by flushing the part with water. Keep the part wet with water.
(6) Blast cleaning is not recommended for aluminum parts. Steel parts which have been removed from the airplane may
be blast cleaned with glass or grit.
B. Wire Brushing
(1) Wire brush parts for a period of time no longer than necessary to produce a clean surface.
(2) Wire brushing materials must be in accordance with Table 2.
(3) Wire brush speeds and pressure must be such that obvious surface smearing and excessive heating and wearing of
the part surface does not occur.
Table 2. Abrasives and Their Usage for Manual Deoxidizing
Abrasives
Emery paper or
cloth (silica
carbide)
Aluminum oxide
paper or cloth
Steel wool
Aluminum wool
Stainless steel
wool
Carbon steel brush Recommended
ScotchBrite
Stainless steel
brush
6. Pretreatment Priming
A. Procedure
(1) Pretreatment primer is a primer containing phosphoric acid. It is applied to clean, dry metal to prepare a base for fuel
and corrosion resistant primer.
NOTE:
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Carbon and Corrosion
Low Alloy Steel Resistant Steel
Recommended Acceptable
Acceptable Recommended
Acceptable Prohibited
Prohibited Prohibited
Acceptable Recommended
Prohibited
Recommended Recommended
Acceptable Recommended
Pretreatment primer is not recommended for areas exposed to fuel, oils and/or phosphate
ester hydraulic fluid unless some topcoat is applied. Refer to individual metal paragraph for
alternatives.
FOR TRAINING PURPOSES ONLY
ISSUE 02 , JAN 2018
Model 510 Structural Repair Manual (Rev 2)
Aluminum Magnesium
Alloys Alloys
Acceptable Acceptable
Recommended Acceptable
Prohibited Prohibited
Acceptable Prohibited
Prohibited Prohibited
Prohibited Prohibited
Recommended Acceptable
Prohibited Prohibited
Print Date: Wed Mar 21 05:10:02 CDT 2018
51-20-01-0 (Original Issue)
Copper Alloys
Acceptable
Recommended
Prohibited
Prohibited
Acceptable
Prohibited
Recommended
Acceptable
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