Removal of "White Rust" from Galvanized Steel
Background: Volvo would like to find a corrosion remover that will remove "white rust" from a galvanized steel part without removing the zinc coating.
Purpose: Determine if VpCI-422 will remove the "white rust" on galvanized steel and if VpCI-422 will affect the zinc coating on the parts.
Materials: VpCI-422
VpCI-415
Assorted Galvanized Steel pieces
Methods: ASTM-D-1748
Procedure: The following procedure was followed:
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- Assorted galvanized steel parts were placed in the modified ASTM-D-1748 chamber for 64 hours to create "white rust".
- The parts were removed from the chamber and immersed in VpCI-422 for 25-45 minutes.
- Next the parts were rinsed with deionized (DI) water to remove residual VpCI-422 and then immersed in VpCI-415 to neutralize the surface and provide corrosion protection.
- The parts were allowed to dry, inspected, and a report was written.
Results: VpCI-422 removed the "white rust" from galvanized steel and did not affect the zinc coating on the metal.
Conclusion: VpCI-422 is an excellent product for removing "white rust" from galvanized steel and it should not affect the zinc coating on the surface of the steel.
Project #: 02-270-1625
Estimated Cost of Project: 4.5 Hours
To: Lasse Hellberg, Tribotec AB
For: Volvo
From: Brian L. Wuertz
Date: 01-07-2003
cc: Boris Miksic
Anna Vignetti
Rita Kharshan
Art Ahlbrecht
Cliff Cracauer
Vanessa Schultz
Dario Dell’Orto