BD−700 STRUCTURAL REPAIR MANUAL

APPLICATION OF WATER DISPLACING CORROSION - INHIBITING COMPOUND

1. General

Water displacing corrosion−inhibiting compound (CIC) is a barrier coating applied over a paint
system to optimize corrosion resistance in regions prone to corrosion, condensation and
drainage areas.

This procedure establishes the requirements for the application of a water displacing
corrosion−inhibiting compound, following application of surface finishes. It is also used as a
supplementary corrosion protection, where penetration is required. The thixotropic material
combines good penetration and a thicker barrier for the internal protection of fuselage,
tailcone, wings and stabilizers. This leaves a tack−free waxy film which is transparent, fully
elastic and non−cracking.

Water displacing corrosion−inhibiting compounds (CIC) are volatile liquids which may be
sprayed or brushed on the surfaces treated. The liquid carrier evaporates quickly to leave a
thin film of wax−like residue over the coated surface. The material has the ability to penetrate
into extremely small cavities and to displace water.

The corrosion−inhibitor is able to enter between faying surfaces or between fasteners and
holes, where finish has been broken.

Although this material is durable and not easily removed by normal use, it is possible that
re−application is required. For intervals, which will vary according to the aircraft’s
environment, refer to scheduled maintenance requirements per Time Limits/Maintenance
Checks Manual (TLMC). These compounds tend to dry out and deteriorate depending on
environmental effects and time factors making re−treatment essential.

Apply CIC after repairs and inspections if it was removed.

To establish the impact of the environment in which the aircraft operates, refer to
(SRM 51−27−02), environmental factors section. For other corrosion prevention methods
refer to (SRM 51−27−08).

NOTE: Each operator should evaluate their aircraft’s environment, the inhibitor used, and
the application requirements to ensure adequate corrosion protection. For
assistance in this process, the operator can contact Bombardier Aerospace by
e−mail at:

SRPSA@aero.bombardier.com (prefered), or
Contact Bombardier Aerospace, by Phone at:
Customer Response Center (CRC)
Local and International: 514−855−2999
North America only: 1−866−JET−1247 (1−866−538−1247) Toll Free

EFFECTIVITY: ALL

51−27−16 Page 1
Jul 31/2018
 BD−700 STRUCTURAL REPAIR MANUAL

2. Reference Information, Tools and Equipment, Consumable Materials

A. Reference Information

Reference Designation

SPM−MM 51−25−00−110−801 Solvent Cleaning

SPM−MM 51−25−00−110−802 Detergent (Alkaline) Cleaning

SPM−MM 51−25−00−120−802 Abrasive Cleaning

SRM 51−27−02 Corrosion Types and Identification

SRM 51−27−08 Corrosion Prevention Procedures

SRM 51−31−00 Consumable Materials

B. Tools and Equipment

Reference Designation

Spray Gun WA 1,2,3,4,6,7 and EMS TOGO, Dinol Products from Vendors:
11 Nordsand Corporation or DeVilbiss Company or
Graco Incorporated

Spray Gun Pressure Aviation Compact System (ACS)

Container of One Liter Cans of
Dinitrol, That Can Be
Discarded

NOTE: For ground support equipment (GSE), refer to the ILLUSTRATED TOOL &
EQUIPMENT MANUAL and/or ENGINE MANUAL.

C. Consumable Materials

Reference Designation Specification and/or Manufacturer

Aliphatic Naphtha Specification TT−N−95

Corrosion−Inhibiting MIL−PRF−16173
Compound Type I Lear Chemical Research Co., Dinol
(Penetrating) − Dinitrol AV−8 International

Corrosion−Inhibiting MIL−PRF−16173
Compound Type II Lear Chemical Research Co., Dinol
(Thixotropic) − Dinitrol AV−30 International

EFFECTIVITY: ALL

51−27−16 Page 2
Aug 06/2015
 BD−700 STRUCTURAL REPAIR MANUAL

Reference Designation Specification and/or Manufacturer

Corrosion−Inhibiting MIL−C−81309
Compound Type III Lear Chemical Research Co., Dinol
(Ultra−Thin) − Dinitrol International
AV−ACF 50

Corrosion−Inhibiting MIL−PRF−16173
Compound Type IV (Heavy Lear Chemical Research Co., Dinol
Duty Super Penetrating) − International
Dinitrol AV−15 (Acceptable
Alternative to Types I and II)

Corrosion−Inhibiting
Compound Type V (Ultra−Thin Zip−Chem Products, San Jose, CA
Heavy Duty Super
Penetrating) − Cor−Ban 23
(acceptable alternative to
Types I, II or IV)

Cotton Cloths, Lint Free Commercially Available

Cotton Swabs Commercially Available

Dry Cleaning Solvent MIL−PRF−680

Kraft Paper Commercially Available

Lacquer Thinner Specification A−A−857

Masking Tape Commercially Available

Paint Brush Commercially Available

Plastic Film Commercially Available

Protective Gloves Commercially Available

Safety Glasses/Goggles/Face Commercially Available

Shield

White Spirit Commercially Available

NOTE: For more detailed information, refer to Consumable Materials

(SRM 51−31−00) .

EFFECTIVITY: ALL

51−27−16 Page 3
Aug 06/2015
 BD−700 STRUCTURAL REPAIR MANUAL

3. Limitations and Inspection

A. Limitations

WARNING: OBEY THE PRECAUTIONS THAT FOLLOW WHEN YOU USE

CORROSION PREVENTIVE COMPOUNDS:
- PUT ON APPROVED EYE, MOUTH AND BODY PROTECTION.
- DO THE WORK IN AN AREA THAT HAS A GOOD FLOW OF CLEAN
AIR.
- MAKE SURE THAT THE AREA HAS NO SPARKS, FLAME, OR HOT
SURFACES. THERE MUST BE SUFFICIENT FIRE PROTECTION
AVAILABLE.
- OBEY THE MANUFACTURER'S INSTRUCTIONS.
- DO NOT LET THE CORROSION PREVENTIVE COMPOUND GET
ON THOSE SURFACES THAT ARE LUBRICATED. YOU COULD
CHANGE THE LUBRICANT'S PROPERTIES.
- DO NOT LET THE COMPOUND TOUCH ELECTRICAL
CONNECTIONS. THE COMPOUND IS DIELECTRIC AND CAN
CAUSE AN ELECTRICAL MALFUNCTION.
- DO NOT LET THE COMPOUND GET ON THE OXYGEN SYSTEM
COMPONENTS. THIS COULD CAUSE AN EXPLOSION AND/OR A
FIRE.
- DO NOT BREATHE THE FUMES OR LET THE COMPOUND
TOUCH YOUR SKIN. GET MEDICAL AID IMMEDIATELY IF
IRRITATION OCCURS.

CORROSION PREVENTIVE COMPOUNDS CAN BE FLAMMABLE,

POISONOUS AND DANGEROUS.

(1) Hydrocarbon compounds can be dangerous when mixed with oxygen. Shield
oxygen system components to protect them from direct or indirect contamination.

WARNING: AS A FIRE SAFETY PRECAUTION, MATERIAL SHOULD BE KEPT

AWAY FROM SURFACES THAT WILL GET HOTTER THAN 300
DEGREES FAHRENHEIT (149 DEGREES CELSIUS) IN SERVICE.
THE DRY FILM FLASH POINT IS 500 DEGREES FAHRENHEIT
(260 DEGREES CELSIUS).

CORROSION INHIBITOR CONTAINS FLAMMABLE

COMPONENTS. DO NOT EXPOSE THESE MATERIALS TO OPEN
FLAME, ACTIVE CIRCUITS, OR OTHER COMPONENTS WHERE
A POTENTIAL FIRE HAZARD WOULD EXIST. THE VOLATILE
CARRIER IS ALSO FLAMMABLE. MAINTAIN SAFETY
PRECAUTIONS UNTIL THE CARRIER HAS FULLY EVAPORATED.

(2) Take all precautions with these materials which can constitute a fire hazard when
subjected to high temperature.

EFFECTIVITY: ALL

51−27−16 Page 4
Jul 31/2018
 BD−700 STRUCTURAL REPAIR MANUAL

(3) Mask electrical connectors where there is a possibility of contamination of electrical

contacts.

CAUTION: DO NOT ALLOW COMPOUND TO COME IN CONTACT WITH

WIRING OR ELECTRICAL CONNECTORS. AVOID DIRECT
APPLICATION TO PULLEYS, TEFLON BEARINGS, AND
LUBRICATED SURFACE.

CAUTION: REMOVE EXCESS CORROSION-INHIBITING COMPOUNDS

FROM MECHANISMS AND MOVING PARTS WITH A CLEAN, DRY
CLOTH. THE RESULTANT THIN FILM IS ADEQUATE FOR
CORROSION PROTECTION. EXCESSIVE BUILDUP COULD
HARDEN AT LOW TEMPERATURES AND CAUSE OPERATING
DIFFICULTIES.

(4) Avoid direct application of CIC compounds on pulleys, teflon−lined bearings and
lubricated surface. Mask with Kraft paper and/or tape to protect these components.

CAUTION: THE COMPOUND CAN CAUSE SILICONE RUBBER AND

HYDRAULIC FLUID RESISTANT SEALS TO SWELL.

(5) Take all precautions when CIC is applied near door or emergency hatch seals.
Protect grease seals in bearing assemblies or rubber−lined clamps for tubing or
wiring. It is possible to affect hydraulic seals, so these corrosion inhibitors are not
suitable for use on actuator rods. Masking is recommended.

(6) Do not apply CIC on grease joints or sealed bearings. These compounds dissolve
greases and other lubricants. They are penetrating compounds and can get around
the seals and into the bearings.

(7) Do not apply CIC on insulating blankets. The compound reduces the
water−repellant quality of the blankets.

(8) Do not apply these compounds on interior materials such as cargo liners. The
compounds change the flammability properties of these materials.

(9) Do not apply these compounds near engines, cowling, or related areas of high
temperature or where firewall sealant is used. The high temperature can cause
deterioration of the compounds. CIC can cause damage to the sealant.

B. Inspection

(1) Allow primers and enamels to cure 8 hours minimum. The evaporation of volatile
solvents takes approximately 6−8 hours at an ambient temperature of 70°F (21°C).

(2) Sealants must be tack−free before the application of the corrosion−inhibiting

compound.

(3) The compound leaves a transparent film. The condition of the metal surfaces can
easily be inspected without destroying the protective film.

EFFECTIVITY: ALL

51−27−16 Page 5
Jul 31/2018
 BD−700 STRUCTURAL REPAIR MANUAL

4. Compatibility of Compounds

Since these materials are usually all hydrocarbons, it is possible to apply new applications of
a different compound over existing corrosion inhibitors without adverse effects. It is permitted
to use the compound on fiberglass fairings and ducts if the temperature of the duct is not
hotter than 104°C (220°F).

5. Application

A. General

Refer to Figure 1 and Figure 5 and Table 1.

Water−displacing CIC is an added protection against corrosion, usually on assembled

aircraft structures.

The fuselage floor structure, fuselage interior, tailcone and wing areas of the aircraft are
protected with these materials (Refer to Figure 1 and Figure 5 and Table 1).

Table 1 − Structural Application Requirement

Zone Requirement

Front wing spar and leading edge Apply to forward face of wing front spar and all
WS47.00 to WS544.00 internal structure aft of the shroud, including
attaching hardware.

Fuselage interior from FS202.75 to Apply to all fuselage internal structure.

FS861.00
NOTE: Avoid spraying C.I.C. on the following
parts; electrical connections, oxygen
components, pulleys, teflon bearings,
lubricated surfaces, hot air ducts,
door mechanisms and
transparencies (windows etc.)

Tailcone interior from FS1017.87 to Apply CIC on forward and aft tailcone internal
FS1167.30 skins and all flanges of structural components
attached to the tailcone skins.

NOTE: Protect the seals before you apply

CIC. Do not apply CIC to the APU
unit components.

Apply CIC manually. Do not use

spray guns.

EFFECTIVITY: ALL

51−27−16 Page 6
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

FS 861.00

FS 280.00

WL 79.50

FS 202.75

LEGEND
Apply water−displacing corrosion−inhibiting compound,
type 1, level 1 to the shaded area.
− All internal structure between FS 202.75 and FS 861.00.
GSR5127160_001

Corrosion−Inhibiting Compound−Fuselage
Figure 1

EFFECTIVITY: ALL

51−27−16 Page 7
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

B. Preparation

To achieve the best coverage of the specified structure perform the procedure that
follow:

(1) Before applying the CIC, vacuum−clean and/or use a clean cloth to remove
moisture and any unwanted materials from the surfaces to be coated.

(2) When necessary, it is permitted to remove the CIC by solvent cleaning with dry
cleaning solvent, refer to paragraph 6 and (SPM−MM 51−25−00−110−801).

(3) Mask or cover the following areas to avoid direct contact with compound during
application. Use masking tape and a non adherent material, such as Kraft paper or
plastic film:
− limit switches
− limit switch operating mechanisms
− dump valves
− open electrical connectors
− electrical or electronic equipment
− relay bases
− windows
− oxygen pipes and fittings
− all non−oxygen system piping open ends and loose fittings.

(4) When spraying is used as a method of application, direct spray on the following
items must be avoided:
− bearings
− pulleys
− rubber items
− system components
− ducts
− non−oxygen systems piping

(5) Sealants must be tack−free, before the application of the CIC.

(6) Mask faying surfaces that require faying surface sealant for assembly after
application of water displacing compound.

(7) The preferred application method is with specialized pressurized spray guns, such
as Dinitrol applicators or by aerosol can.

(8) Do not connect air hose to spray gun.

(9) Too high pressure increases fogging.

EFFECTIVITY: ALL

51−27−16 Page 8
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

(10) Too low pressure will cause product to stream or puddle.

(11) Adjust pressure to optimal atomization without fogging or dripping.

(12) The extent of compound application is defined as Level 1 or Level 2.

C. Level 1 Application

Refer to Figure 1, Figure 2 and Figure 3.

In level 1, the CIC is applied to all structural surfaces within a given area. Do the
following for Level 1 CIC application:

(1) Spray application is recommended, use specialized spray guns, such as Dinitrol
applicators, or aerosol containers (Refer to Figure 2).

(2) Apply compound type as required to all structural surfaces.

(3) For the following specific locations, first apply Type I (AV8) compound followed by a
second coat of Type II (AV30) (Refer to Figure 3):

(a) Stringers, profiles and ribs

(b) Narrow closed cavities

(c) Cavities and box sections

(d) Tubular and angled sections

(e) Seatrails

(4) Spray the coating to increase its penetrating properties.

(5) If no penetration is required, it is permitted to apply the coating by brushing.

(6) For small holes, application by brush is preferred.

(7) Apply the coatings as a full wet coat to get the following dry film thickness:

(a) Type I − 0.25 to 0.50 Mils (0.00025 to 0.0005 inch)

(b) Type II − 0.80 to 1.60 Mils (0.0008 to 0.0016 inch)

(c) Type III − 0.20 Mils Max (0.00020 inch max)

(d) Type IV − 0.80 Mils (0.0008 inch) Max (acceptable alternative to Types I and
II)

EFFECTIVITY: ALL

51−27−16 Page 9
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

(e) Type V − 0.40 Mils (0.0004 inch Max (acceptable alternative to Types I, II or
IV)

NOTE: Coating thickness in recesses or other areas, which present

difficulties in access, may be outside of the ranges shown above.

(8) Allow the compound to remain as applied for a minimum of 30 minutes soak period.

(9) After application, the viscosity of the compound increases.

(10) Use dry rags and wipe up puddles after the 30 minutes soak period.

(11) Allow the CIC compounds to cure for 8 hours minimum.

(12) Ventilate all enclosed areas of the aircraft, before closing or covering, to allow for
evaporation of volatile solvents.

EFFECTIVITY: ALL

51−27−16 Page 10
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

WA 1 No 7200 WA 2 No 7201

WA 3 No 7202

WA 4 No 7203

WA 11 No 7210

WA 6 No 1178

WA 7 No 5062

GSR5127160_002

BODY
CUP F. HOUSING
FILTER NIPPLE
JET

Dinol Spray Guns

Figure 2

EFFECTIVITY: ALL

51−27−16 Page 11
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

NOTE
First application with AV8 and let it cure,
followed by a second application with AV30

WA 1,2,3
STRINGERS, PROFILES,
RIBS, OPEN SURFACES

WA 4
NARROW CLOSED CAVITIES

WA 11
CAVITIES AND BOX SECTIONS
WHERE SPRAYING BACKWARDS
IS REQUIRED

GSR5127160_031

WA 7
TUBULAR AND ANGELED SECTIONS,
PROFILES AND LONGERONES

How to Apply Corrosion−Inhibiting Compound (Level 1)

Figure 3 (Sheet 1 of 3)

EFFECTIVITY: ALL

51−27−16 Page 12
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

WA7
TUBULAR AND ANGLED SECTIONS,
SEAT RAILS, PROFILES AND LONGERONS
GSR5127160_032

NOTE
Fill with low density wax to top of rail,
followed by an application of AV30

How to Apply Corrosion−Inhibiting Compound (Level 1)

Figure 3 (Sheet 2 of 3)

EFFECTIVITY: ALL

51−27−16 Page 13
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

LEADING EDGE

FRONT SPAR

WA 6 No 1178

GSR5127160_033

B−B

How to Apply Corrosion−Inhibiting Compound (Level 1)

Figure 3 (Sheet 3 of 3)

EFFECTIVITY: ALL

51−27−16 Page 14
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

D. Level 2 Application

Refer to Figure 4 and Figure 5

(1) In level 2, the compound is applied to the seams of all the structure parts in a given
area.

NOTE: This method is best for small confined areas or where caution is
necessary to keep CIC away from adjacent equipment.

(2) Use an ordinary paint brush and apply compound type as required, to the seams of
all structure parts within indicated areas.

(3) Allow the CIC compounds to cure for 8 hours minimum.

E. Application to Control Cables

(1) Before the CIC is applied, vacuum−clean and/or use a clean cloth to remove
moisture and any unwanted materials from the surfaces to be coated.

(2) Apply CIC compound to required areas with brush, spray or wipe on the cable so it
penetrates into the strands. Cover the cable surfaces, they will dry tack free in
approximately 24 hours.

EFFECTIVITY: ALL

51−27−16 Page 15
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

CORROSION−INHIBITING COMPOUND APPLICATION

ON EXTRUDED OR FORMED SECTION ASSEMBLIES

3.00 in MIN
STRUCTURE (76.0 mm)

3.00 in MIN 3.00 in MIN 3.00 in MIN

(76.0 mm) (76.0 mm) (76.0 mm)

CORROSION−INHIBITING
COMPOUND (TYPICAL) CORROSION−INHIBITING
COMPOUND (TYPICAL)
GSR5127160_041

STRUCTURE

How to Apply Corrosion−Inhibiting Compound (Level 2)

Figure 4

EFFECTIVITY: ALL

51−27−16 Page 16
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

FS1168.00

FS1168.00

FS1106.46

FS1017.87 FS1103.00

EFFECTIVITY
1 A/C POST IS700−53−0020 BL0.00
1

FS1106.46

FS1017.87
1

GSR5127160_051

LEGEND

Apply water−displacing corrosion−inhibiting compound,

type IV or V, Level 2 to the shaded area.
Apply CIC on skins and all lower flanges of structure elements
attached to skin between FS1017.87 to FS1167.30.

Corrosion−Inhibiting Compound−Tailcone
Figure 5 (Sheet 1 of 2)

EFFECTIVITY: ALL

51−27−16 Page 17
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

FS1167.30

WL113.43

BL0.00 FS1103.00

FS1167.30

WL113.43

FS1103.00 BL0.00
GSR5127160_052

NOTE

1 Do not apply corrosion−inhibiting compound on the fireshields.

Corrosion−Inhibiting Compound−Tailcone
Figure 5 (Sheet 2 of 2)

EFFECTIVITY: ALL

51−27−16 Page 18
Feb 07/2019
 BD−700 STRUCTURAL REPAIR MANUAL

6. Removal of Corrosion−Inhibiting Compound

A. General

(1) Remove the CIC before finish is apply.

(2) Before a penetrant inspection is performed, remove the CIC compound with dry
cleaning solvent MIL−PRF−680, ((SPM−MM 51−25−00−110−801)).

NOTE: Do not use methyl ethyl ketone (MEK), acetone or chlorinated solvents.

(3) When solvents are used to remove CIC, allow a good flow of air in the area until the
solvents evaporate.

7. Touch−up

A. General

(1) It is permitted to repair or apply coating by localized spraying with aerosol cans or
by hand pump application.

(2) Application by paint brush to small voids or defects is also acceptable.

(3) Keep repair area dimension to a minimum with sufficient overlap onto the existing
coating to ensure continuity.

(4) When coating is removed for inspection purposes, do touch−up.

8. Exterior Discoloration by Water Displacing Corrosion Inhibiting Compound

A. Because of the excellent penetrating properties of these materials, the use of water
displacing CIC on the internal surfaces of the airplane can “bleed through” at fasteners
that are not fluid tight. This is normal, and does not indicate a requirement to replace or
redrive the fasteners. The tiny passages should seal themselves within a short time.
Clean exterior surfaces with solvents to remove any material that can have bled through,
((SPM−MM 51−25−00−110−801)).

EFFECTIVITY: ALL

51−27−16 Page 19
Feb 07/2019