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Vehicle & Component Manufacturers

The effectiveness for corrosion protection on a vehicle was put to test with the following experiment :



Vehicle
(1A) A Corrosion coupon was placed in front door
      showing a sachet of VCI product mounted on a
      panel at the lower left side.


Vehicle
(1B) Corrosion coupon in front door - after an
      installation period of 317 days.


Vehicle
(2A) A Corrosion coupon placed in rear door,
       without any VCI corrosion protection.


Vehicle
(2B) Corrosion coupon in rear door - after an
       installation period of 317 days.


Vehicle
(3) Visual inspection of the coupons shows serious
     and substantial corrosion, of the unprotected
     coupon. There are only marks on the
     protected coupon, but no visual metal loss.


Conclusion:

Every tack weld or crimp in the panel or any unprotected metal is at risk of serious corrosion, including any holes cut or fasteners installed which were not passivated or treated on installation. Noticeable, corrosion starts inside the panels and is only seen when the outer paint surfaces break up. Corrosion protection sachets installed in the door panels and in other hollow sections will greatly reduce corrosion and will increase the life of the vehicle.



Also see the following case studies:

Chemical & Petrochemical and other
Military
Buildings







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