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Old September 10th, 2013, 12:18 AM
CaptMidnite
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Daniel Choi
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galvanic corrosion

There are many previous threads on this forum about galvanic corrosion on doors and other body parts, etc, and how repairs are simply about peeling back the aluminum, welding in new steel channels and putting it all back together. But how reversible is the corrosion on the aluminum skin: the blistering paint, the orange rust that has seeped through the metal apparently and/or the white oxidation residue? If the aluminum skin hasn't rusted through (can it do this?), is it a matter of sanding the nasty stuff away and repainting?

Or, does the old aluminum have to be cut away and new stuff welded back in?
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Old September 10th, 2013, 01:04 AM
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evilfij
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evilfij
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Quote:
Originally Posted by CaptMidnite View Post
There are many previous threads on this forum about galvanic corrosion on doors and other body parts, etc, and how repairs are simply about peeling back the aluminum, welding in new steel channels and putting it all back together. But how reversible is the corrosion on the aluminum skin: the blistering paint, the orange rust that has seeped through the metal apparently and/or the white oxidation residue? If the aluminum skin hasn't rusted through (can it do this?), is it a matter of sanding the nasty stuff away and repainting?

Or, does the old aluminum have to be cut away and new stuff welded back in?
If you don't have holes, it should not get worse and should be fine with a repaint and isolate the aluminium and steel. At least that is my experience with door bottoms.
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Old September 10th, 2013, 06:37 AM
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Bill Adams
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I'll take flak for this, but the aluminum can be repaired with that aluminum solder stuff. It goes by many names, Luma-weld, etc.
You have to grind out the oxidation with a Dremel, then use a MAPP torch to heat the area and melt new metal into the divot. Sand or file smooooothe. Even if it is perforated it will fill gaps up to a quarter inch.
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