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Mfgr. asks if ground current causes corrosion of aluminum garage doors

We have an Aluminum garage sliding screen door unit, which is installed in the Garage door opening section with a header a track and side jambs, and the door panels will be lifted into the installed tracks and slide across the opening along the 3 to 4 panel track. Now my question is we have homeowners call a few months after about a bubbling looking coating of sometimes powdery substance appear on their sliding door panels. We were told this may be a form of Oxidation. Formed by an electrical current running underground, that affects the aluminum. And is the remedy to connect a ground wire to the side of the main frame to a grounding rod in the ground?

Dominick Gerard
- Nokomis, FL, USA
2004

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Corrosion of bare aluminum is to be expected if frequently wet. Most patio type sliding aluminum door frames are anodized, which prevents the problem.

Jeffrey Holmes, CEF
Spartanburg, South Carolina
2004