Mobile Facility Corrosion Control

1. Mobile FacilityCorrosion Control Prepared by SSgt Napolitano 14 March 2014

2. ISO Corner Evaluation Touch-up Work Only Only Surface Corrosion Present Complete Resurface Recommended Pitting, Exfoliation, and/or Polyurethane Compromise

3. Side Rail/End Rail Evaluation Considerable corrosion is present all along the side rail (pictured) indicates a full resurfacing required. If light surface corrosion exists on any side/end rail, the portion of the rail affected must be treated appropriately. It is recommended that all 8802 seals be treated and redone if any compromise to the seal is found.

4. Step 1:Evaluate the ISO Corner The example prior to work being performed. Significant surface corrosion is evident and likely pitting and/or exfoliation. Extensive compromise to the polyurethane is present. Exfoliation and pitting are occurring though not completely visible. Take note of the identified areas. No pitting is apparent.

5. Step 2:Remove All Surface Contaminates An External View of the same ISO Corner Properly Cleaned to the Bare Metal An Internal View of an ISO Corner Properly Cleaned to the Bare Metal Once the contaminated surface layers are removed, the pitting is significant. Elapsed Time ~4 hours for a proper surface cleaning.

6. Step 3: Corrosion Preventative Compound • Clean the surface thoroughly with isopropyl alcohol or fresh water. Let it dry completely. • Using a paint brush (not acid brush) apply successive Stop Rust! layers. • Allow each layer to dry to the touch before applying a new layer. • Continue applying layers until the Stop Rust! remains a blue or purplish color. This indicates that no further corrosion is chemically reacting with the Stop Rust! • The image to the right is a good example of a proper ‘Rust Stopped’ ISO corner. Ensure all associate areas around the ISO corner are not ignored. This MF was DRMO approved and utilized as an example only. Process Step should take ~1 hour.

7. Step 4: Apply Weather Protection • The 2 part Epoxy Primer Polyurethane (MIL-STD-23377J) is the authorized weather protection applied. • Blue/Grey PWC 277 is an alternate only if 2 part Epoxy Primer is not available. • Apply successive layers of the primer until you can’t see black through the yellow. • Use only paint brushes, not acid brushes. • The image to the right is a good example of a properly primed ISO corner. Example of a properly coated ISO corner 6 months after completion. Process Step should take ~1 hour.

8. Step 5: Application of Final Coating • In order to reduce the damage which occurs during typhoon season, the utilization of Tectyl 2423 is applied as the external coating over the epoxy primer. • Tectyl 2423 is applied like paint using paint brushes. Not acid brushes. • Application of Tectyl should be applied in successive layers. Each layer should be dry to the touch prior to additional layers being applied. • Once the yellow polyurethane is completely obscured, the protective layer should be sufficient. • Work centers may utilize 2 part white polyurethane as an final top coat in lieu of Tectyl or apply the 2 part white polyurethane over the Tectyl. Example of a properly coated ISO corner 10 months after completion. Process Step should take ~1 hour.

9. What’s in it for me? (WIFM) • Better deployment and readiness posture for expeditionary operations. • Less Van CC work required annually. • Less ‘inspection prep’ and more sustainable results. • Better material condition of the mobile facilities. • Significantly improved resistance to the weathering that occurs during Typhoons.