The document summarizes the rust remediation and preservation methodology for rotating spares at Sahara Petrochemical's Al Waha plant. The methodology involved cleaning rust from carrier stator blades and bearings using VpCI corrosion inhibitors, applying a temporary coating, drying, and wrapping in VpCI film. This process was used to preserve 4 spare parts during outdoor storage.

1. RUST REMEDIATION AND OUTDOOR
PRESERVATION OF ROTATING SPARES
Client: Sahara Petrochemical, Al Waha Plant
FEBRUARY 12, 2015
YUSUF BIN AHMED KANOO CO LTD
Ahmed Waqas

2. Working methodology for Sahara Petrochemical preservation job.
1. Unboxed the carrier stator blade and blew away all of dust, debris and all other loose surface
contamination with the aid of compressed air.
2. Inspected the carrier stator blade surface to locate the corroded portion and took pictures of
the areas that were corroded.
3. It was then placed in the container which was filled with VpCI-422 to 20% of tank volume.
4. Sprayed VpCI-422 with the help of compressed air including all the inaccessible areas of stator
blade.
5. For the exposed portion we applied VpCI-423 gel and left it for about 2-3 hours.
6. After this time Power washed it with VpCI-418L 20% mixed with water to neutralize.
7. Reapplied 422/423 until wherever the corrosion was not removed to ensure the complete
removal of corrosion from the outer & inner surface.
8. After corrosion removal took pictures again.
9. Then left it for air dry.
10. After complete drying we applied VpCI-368 temporary coating with the help of spray gun to all
the inner and outer surface ensuring that all the area is covered, with a proportion of 3 parts of
VpCI 368 to 1 part of mineral spirit.
11. Left the stator blade for indoor drying for about 24hrs.
12. After complete drying of the coating applied, wrapped it in Milcorr-VpCI shrink film and heat
shrink it to tight fit.
13. Lastly, placed this wrapped stator blade in a closed wooden box.
Note: This methodology was applied for all the carrier stator blades & Bearings available as
shown in the table below.
Sr.
No
Type
Storage
Bin
Material
No.
Short Text
Actual
Qty
42 OLG Y201D01 90000063 Carrier,Stator Blade,10343631 1
118 OLG Y201D01 90000067 Carrier,Stator Blade,10349008 1
110 OLG Y201D01 30014883 Set:Axial Roller Bearing,POS#2620,RENK 2
114 OLG Y201D01 30020008 Assembily:Complete Annulus Wheel Carrier 1

3. Material No: 90000063
Material No: 90000067
Before After
Coating Applied Final Wrapping
Before After
Coating Applied Final Wrapping

4. Material No: 30014883
Material No: 30020008
Before Before
Final Wrapping Final Wrapping
Before After
Coating Applied Final Wrapping