A 320 SRM 51-21-11 APLICATION OF PROTECTIVE TREATMENT TO METAL PARTS

Customer : ENV
Type : A320
Rev. Date : Nov 01, 2016
51-21-11 Application of Protective Treatment to Metal Parts
Manual : SRM
Selected effectivity :
- Apply passivating solution (Item 11) with a brush or swab to the plated surface. Allow
the solution to remain in until a yellow or gold appearance is obtained.
- Rinse the area with clean cold running water.
- Dry the repair area with an air blast or with a hot air dryer at a maximum temperature
of 50° C (122° F) or gently dab the surface with soft clean tissues, absorbent paper or
clean cotton wool.
- Inspect the treated areas as described in 2.B.(1).(e).5.e Paragraph 4.
NOTE: Make sure that the required paint coatings are applied within 16 hours.
NOTE: Do not return used solutions in original containers. The solutions, rinsing water
and used bonnets must be processed or destroyed by an approved organization.
Contaminated packaging if not re-used with the same product is also special
waste to be sent to an approved organization for recycling or disposal.
(f)
Cadmium brush plating (or pad cadmium plating DALIC process) for stainless steels with
maximum tensile strength of 1100 N/mm² (159 KSI).
NOTE: This process must be carried out by trained and approved personnel. An operator training
service is available from the solution suppliers.
1 Equipment
- Power supply: variable rectifier minimum fitted with voltmeter, ammeter, ampere-hour
meter, reversing switch and on/off switch.
- Dishes for solutions glass polyethylene or porcelain flat bottom dishes of convenient size.
- Electrodes: Use DALIC, DALIC UK or SIFCO tampons which have to be prepared in
accordance with the material manufacturer's instructions. For optimum deposit speed area
and shape of the anode must be determined by the area and the shape of the part to be
plated. The size should be s/6 < S < s/3 where "s" is the area to be treated and "S" the
area of the anode.
- Hot air dryer (oil free).
2 Repair Materials
ITEM NOMENCLATURE QTY MATERIAL/REMARKS
1 Cleaning Agent AR Material No. 11-003 or 11-026 (Refer to
CML)
2 Lint free cloth, cotton wool AR Local Purchase
3 Abrasive Paper - Silicon Carbide
(grade 120)
4 Abrasive Paper - Aluminum Oxide
AR Local Purchase
(grade 320 - water resistant)
or finer or red SCOTCH-BRITE
pads
5 Masking Tape AR PVC insulating tape or 3M No. 470 or aluminum
tape Material No. 08-052 (Refer to
CML)
6 Brush or Swab AR Local Purchase
7 De-mineralized Water AR
8 Aluminium Oxide Powder (80 microns)
AR DALIC Reference CC115
9 Brush Plating Tools (use graphite
anode) and Bonnets
AR
Separate anodes, bonnets and solution
must be used at each stage of the
Print Date: December 29, 2016 Page 15 of 29
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