corrosion on rolling stocks

8/6/2019 Corrosion on Rolling Stocks

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CORROSION ON

BOX/BOXN/BOBRNWAGONS


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Corrosion is the general phenomenon for

all types of wagons.

FACTORS RELATED TO

CORROSION :-1. Types of commodities loaded

2. Pattern of loading

3. Running through coastal areas

4. Contamination of rain water with the

Chemical substance.5. Staging of rain water.

6. Overlapping of panel plates.

7. Improper painting without surface prep.


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REASONS FOR CORROSION

1.END PANELS AND STANCHIONS DUE TO

BAD LOADING OF MATERIAL AND LOOSE

SHUNTING.2. DEPOSITION OF RAIN WATER

CONTAMINATED WITH CHEMICAL

PROPERTIES OF MATERIAL LOADED.

3. STAGING OF RAIN WATER ON THE FLOOR.4. FLOWING OF DEPOSITED WATER FROM

FLOOR TO THE SOLEBAR NEAR DOOR WAY.

5. DOOR HINGES IN CONTACT WITH MOISTURE


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CORROSION PRONE AREA ON

BOX,BOXN,BOBRN WAGONS

1. End Panels

2. Side panels

3. Floor

4. Door panels, hinges, frames

5. Body and end stanchions

6. Sole bar near door way7. Bulging out of side panels.

8. Corner and Top copings


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CORROSION PRONE AREA

BOXN Side panel

Overlapping joint

Juggle angle

Reasons for corrosion

1.Contaminated water mixed withchemical substances of loaded

Materials.

2. Running through coastal areas.

3. Deposition of rain water.


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End stanchion

Tarpaulin

cleats

1.Corrosion takes place

Due to pitting during

Loose shunting.2. In contact with

Rain water and exposed

Weather.


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End panels

adjoining with

floor plates

Deposition of rain water

Mixed with the chemical

Substances of loaded

Commodities.


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CORODED AND FINALLY BROKEN

Corrosion took place on the side coping channels due to rain water

Contamination. During unloading by tipplers the weaken portion

Broken.


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Intermediate

copings

Corrosion takes place due

To sagging of rain water.


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Sole bar

Door Hinge Floor

Corrosion causes

Due to flowing of rain water

From floors near door way.

2. Door hinges get corroded

In contact with flowing rain water

From floor.

3. Floor gets corroded due to deposition

Of rain water and water mixed with

Chemical substances contaminated with

Chemical substances of loaded materials.


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CORROSION PRONE AREA ON

BOXN

Insideendpanel


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Corrosion Prone Area On

BOXN Corner

angles

Side andend topChannels


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BOXN

Joint area

between

middle

cerb angle

with side

stanchion


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Corrosion Prone Area on

BOXN

Door

frame Door

Hinge


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BOX

Plate over

joint of

side panel

and floor.


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BOX

Joint area

of top sidepanel and

top end

panel


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Corrosion on BOXN

Side panel


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BOXN Side

Stanchion


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Corrosion Prone Area On BOX

Corner

Angle


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BOX Middle

curb

angle


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BOBRN

Top

Side

Plate


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BOBRN

Door


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Prevention of Corrosion On BOXN wagon

1. IRS M-41 Cu bearing M.S.Plates are used.

2. No small patches are used. Only standard panel

patches from pillar to pillar are used.

3. Full size, Half size and 1/3rd size body stanchionsare used by riveting with sole bar.

4. Joint of stanchions are strengthened by providing

Doom over the joints and inside patches with proper

Welding.5. Replacement of floor by removing old floor.

6. Replacement of full sole bar.


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7. Fitment of Drip trip arrangement near Door ways.

8. Provision of angles over side top Copings to

avoid bulging of side panels.

9. Drain out holes on the floor have been blocked.10.L type bracket is provided in betweens floor

And body stanchions and welded to avoid distortion

11.Surface preparation is being done before painting


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Corrosion on coaches/VPUs


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CORROSION AFFECTED

AREA ( TROUGH FLOOR) LUGGAGE PORTION IN SLR,VPU.

TOILET AREA (BEML).

NEAR TOILET PORTION (ICF/RCF).

DOOR WAY PORTION

Trough floor


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A view of corroded

coach(BEML)


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Corroded Sole Bar( BEML)


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Corroded ICF Head Stock


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Corroded BEML Head Stock


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Corroded Centre Stiffener


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Cracked Center pivot Bkt(BEML)


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91805 WCB

Due to Heavy corrosion of under frame members the coach

was sagging at the ends and in the middle. Entire under

frame is renewed.


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VPH Coaches are received with Sole bar cracks near lifting pad

inspite of Sole bar strengthening


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CORROSION IN

DIESEL LOCOMOTIVE


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Corrosion prone areas

Heat exchangers

a) Radiator

b) Lube oil cooler

c) After Cooler


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Corroded Radiator


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Corroded Lube oil Cooler


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Corroded After Cooler


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Corroded Cylinder Liner

corrosion on rolling stocks

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